This standard specifies mechanical and electrical protocols and data formats for the purpose of enabling the online transmission of digital color proofing data between a color electronic prepress system (CEPS) and a direct digital color proofing system (DDCP). This transmission protocol uses the Small Computer System Interface (SCSI). GB/T 17156.2-1997 Printing technology Prepress data exchange Online transmission from electronic prepress systems to color hard copy equipment GB/T17156.2-1997 Standard download decompression password: www.bzxz.net
This standard specifies mechanical and electrical protocols and data formats for the purpose of enabling the online transmission of digital color proofing data between a color electronic prepress system (CEPS) and a direct digital color proofing system (DDCP). This transmission protocol uses the Small Computer System Interface (SCSI).

CB/T 17156.2—1997
This standard is equivalent to IS010758.1994 Printing Technology—Prepress Data Exchange—Online Transmission from Electronic Prepress System to Color Hard Copy Equipment. The equivalent conversion of standards follows the principles of fidelity, limited scope and inheritance. This standard is formulated to enable the online transmission of digital color proofing data between the Color Electronic Prepress System (CEPS) and the Direct Digital Color Proofing System (DDCP). This standard separates the data format and transmission protocol of the application layer from the data format and transmission protocol of the transport layer, mainly because it is hoped that this standard will be easily applicable to non-SCSI transmission. This standard was proposed by the Press and Publication Administration of the People's Republic of China. This standard is under the jurisdiction of the National Printing Standardization Technical Committee. The drafting unit of this standard is: Institute of Computer Science and Technology, Peking University. The main contributors to this standard are: Li Xiaonan and Xiao Jianguo. (B/T17156.2--1997
ISO Foreword
ISO (International Organization for Standardization) is a worldwide specialized standardization organization composed of national standardization bodies (ISO member bodies). The work of formulating international standards is usually completed by ISO's technical committees. If a member body is interested in a standard project established by a technical committee, it has the right to participate in the work of the committee. International organizations (official or unofficial) that maintain contact with ISO may also participate in the relevant work. In the field of electrotechnical standardization, ISO maintains a close relationship with the International Electrotechnical Commission (IFC). Closely discuss cooperation. The draft international standard proposed by the technical committee is submitted to the member bodies for voting. The international standard can only be formally adopted if it obtains the consent of at least 75% of the member bodies participating in the voting.
International Standard IS010758 is an American standard code: ANSI1I8.4--1989) developed by the American Standards Association. It was adopted by the IS0/TC130 Printing Technical Committee using the fast track review method and was also adopted by the ISO member body. ISO Introduction
The technical content of this international standard is the same as that of the American National Standard IT8.1-1989. At the request of the 1989 IS0)/TC130 plenary meeting, its A was circulated to ISO members as a fast track document for comments. After soliciting comments, the text was widely adjusted according to the third part of ISO/IE: Working Guidelines IT8.A is the result of joint efforts of ISO and international industrial organizations including all major prepress equipment manufacturers in the world. The industry group was originally known as the TDD EStd Digital Data Exchange Standards Committee and later became the founding ANSLIT8 (Image Technology Standards Committee) responsible for the promotion of standards for electronic data interchange in the prepress industry. The data formats in this International Standard are defined in accordance with International Standards ISO 10755 and ISO 10756 for transmission through [ISO 9316]. This International Standard separates the application layer data formats and transmission protocols from the transport layer data formats and transmission protocols, primarily in the hope of making it easier to adapt this standard to non-SCSI transports. Chapter 1 contains the definitions, and Chapters 7 and 8 describe the application layer protocols and application layer data formats used for the proofing transport. These specifications remain valid for connections from FPS to IP using other transport methods. Chapter 9 describes the SCS1 transport mechanism used in this standard for communication from CEPS to IDDCP. Chapter 10 describes the SCSI transport used to implement this standard. command.
National Standard of the People's Republic of China
Graphic lechnologyPrepress digital data exchange-Online transmission from electronic prepress systems to color hardcopy devicesCB/T17156.2—1997
idtIS010758:1994
Graphic lechnologyPrepress digital data exchange-Online transmissionfrom cleetronic prepress systems to celour hardcopy devices1Scope
This standard specifies mechanical and electrical protocols and data formats to enable online transmission of digital color proofing data between color electronic prepress systems (CFPS) and direct digital color proofing systems (IIXCP). This transmission protocol neither requires nor provides a mechanism to guarantee a sustained data transfer rate. These mechanical, electrical characteristics and transmission protocols use the Small Computer System Interface (SCSI).
When the standards mentioned in Chapter 3 conflict with this standard, the following shall apply: This standard shall prevail. 2. Conformity requirements
Any IES that complies with the requirements of Chapters 6 to 10 must be consistent with this standard. 3. Referenced standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards will be revised, and parties using the standards should explore the possibility of using the latest versions of the following standards. GB1988-89 Information Processing: Seven-bit Coded Character Set for Information Interchange (egvIS0/1EC646:1983) GB/T 15533--[995 Information Processing Systems Small Computer System Interface (id1 TSO 9316:1989) GB/T17156.3--1997 Printing Technology Prepress Data Exchange Tape Color Line Drawing Data (idt ISO 10756:1994) GI3/T17156-4--1997 Printing Technology Prepress Data Exchange Tape Color Image Data (idt ISO 10755:1992) 4 Definitions
This standard uses the following definitions:
4.1 Digital Data Exchange Specification Digital Data Exchange Specification (DEs) A method for using digital data between cooperating systems to share digital information. 4.2 Decimal Point Numbering Method notation A decimal number in the form of a numeric character in a numeric field (position 3/0 to 3/9 in GB1988), with an optional decimal point (position 2/14 in GB1588). 4.3 Continuous tone (colour picture) data conione (colour picture) data: A rectangular array of picture elements (pixels). Note: An image is represented by a set of values ​​corresponding to its colour components. For a colour image, a pixel consists of 8 bits, representing cyan (C), magenta (M), yellow (Y) and black (B). 4.4 Line graph data linegrt data
Approved by the State Administration of Technical Supervision on December 16, 1997 and implemented on August 1, 1998
GB/T 17156.27997
refers to a rectangular array of image elements (pixels), each of which has a color. These colors are defined in a color table, which defines the value of the color separation component for each table entry. Note: Line drawing data has a continuous area composed of many patterns with the same color value, which is different from the more colors formed by "dithering" or "error diffusion" technology. Therefore, it is suitable to use run encoding technology to reduce file length and speed up processing. 4.5 Vendor-specific data vendor-specific data sent according to the manufacturer's wishes: 4.6 Proof
A replica or sample of an image obtained through a graphic printing process. 4.7 Direct digital color proofer Direct Digital Proofer is an output device that can directly use mathematical data to produce proofs. 4.8 Image set imageset
A group of logically related data used to generate a proofreading frequency region (can be reverse modulation data, line image data, or commercial data).
5 Symbols and abbreviations
The following symbols and abbreviations are used in this standard: BP: The position of the byte in the label, which is consistent with (R/T15533, the byte position starts counting from 0, 1. The field length expressed in byte digits, SPACE 1:The encoding character for the 2/0 position in GB1988, 0, and the encoding character for the 3/0 position in G1988. h: Hexadecimal data represented by U--9 and A~F is marked with a lowercase "\h" at the end (for example, 36Ah). 6 General requirements
A sample should be a single output medium, containing one or more image sets, each image set contains a rectangular area whose edges are parallel to the edges of the media, and any two image sets do not intersect: Each image set should contain at least one of a continuous tone image data file, a line drawing data file or a manufacturer-specific data file, and there is only one of each type. When an image set contains both a line drawing file and a continuous tone image file, the line drawing file takes precedence (for example: the transparency or opacity of the line drawing file determines the visibility of the image data below). All files in an image set must have the same position, orientation, line length and area visibility (that is, to be accurate).
The data transmission between CEPS and DICP should be in accordance with the provisions of this standard (GB/T15533). The application needs to communicate with the transmission layer through application layer commands. The data descriptor is used to communicate with the transport layer. The data descriptor is used to transmit relevant information between the CEPS and the DCP. 7 Application layer protocol for sample transmission
The application layer communicates with the transport layer through application layer commands. These commands convert data attribute information into the form of data descriptors. There are two types of data descriptors used for sample transmission, one of which is used to summarize the information sent from the CEPS to the DCP, and the other is used to describe the information sent from the DDCP to the CEPS. The descriptors passed to the DLCP are: job descriptor, color plate descriptor, image set descriptor, continuous modulation image file descriptor, line image file descriptor, business-specific file descriptor and set device performance descriptor. The descriptors sent by the DLCP are: job status response, device status response, device capability response, current performance response and error response.
7.1 Application layer commands
The following commands are for communication with the DCP: SFVOB (send job) STOPIOR (stop job) GFTGB/T 17156.21997
JOBSTATUS (get job status), GETIEVICESTATUS (get device status), GETDEVCECAPABIL.I-TY (get device capability), SETDEVICEFEATLRE (set device performance), GETCURRENTFEATURE (get current performance), and REPORT STATUS (report status). The former should be used frequently and must be implemented, while the latter should support optional "user status reporting". The response to the command should be either GOOD (success) or ERROR (error. If the response is "success", the job continues; if the response is "error", the error information is stored in the error response data structure. The error response data structure will be described in 812. The way the transport layer executes the above application layer commands depends on the specific transmission media used. This standard introduces the SCSI implementation method 7.1.1 SENDJOB (send job)
A job is initiated by inserting the following information from the EPS IDKCF in the following order: a job descriptor (see 8.1)
a first separation descriptor (see 8.2)
a second separation descriptor;
a first image set descriptor (see 8.3), a first continuous tone image descriptor (see 8.1) and continuous tone image data if present); a first line drawing descriptor (see 8.5), a lookup table (see 8.5.1) and line drawing data (if present); a first vendor-specific descriptor (see 8.6) and vendor-specific data (if present): other image set descriptors, file descriptor data. The following example illustrates a relatively simple descriptor and data sequence consisting of two image sets. The first image set includes continuous tone image data and line drawing data. The second image set includes injection image data. Data transfer sequence example:
Job descriptor
---Color plate descriptor (color, 1)
Color plate descriptor (color 2)
--Color plate descriptor (color 3)
Color plate descriptor (color 4)
Image set descriptor (image set 1)
--Continuous tone image file descriptor
Continuous tone image data
": Line drawing file descriptor
Color definition table
Line drawing data
Image set descriptor (image set 2)
Continuous tone image file descriptor
Continuous tone image data
7. 1-2 STOP JOB (stop job)
A job that is currently transmitting data to the DDCP or is being released can be stopped by sending the "stop job" command. The CFP can send this command at any time.
7.1. 3 GET JOB STATUS (get job status) The status of the job can be obtained by sending the "get job status" command. 88 describes the job status data. 7.1. 4 GFT DFVICE STATUS (get device status) The status of the LCF device can be obtained by sending the "get device status" command. 8,! Block describes the device status data. 7.1. 5GE [DFVICE CAPABILITY (get device capability) DCE
GB/T 17156. 21997
7.1. 6 SET DEVICF FEATURE (Set device feature) II) The optional features of the DCP can be set by the "Set device feature\ command. The device feature description is shown in 8.7. 7.1.7 GETCURRENTFEATURE (Get current feature) The current status of the DCP optional features can be obtained by sending the "Get current feature" command. The response to this command is shown in 8.11. 7.1.8 RFPORT STATLS (Report Status) This optional command is used by the DDCP to report the status of a job. When this capability is used, it must be explicitly enabled (via the Set Device Capabilities command) by the CEPS after determining that the capability is supported (via the Get Device Capabilities command). The Job Status response data is described in 8.8.
7.2 Command Sequences
Figure 1 illustrates a typical Application Layer command sequence. The Get Device Capabilities command shall be available at Power Up and may be optional during system operation to determine the specific characteristics and capabilities of the device.
The normal sequence for transferring data to a device begins with the Get Device Status command. If an Error status is returned, no further data is sent until the Get Status is cleared; if the Return Status is Successful, a Send Job command is sent. This process may be repeated for all jobs sent to the device. The Get Job Status command may be used to determine the status of a job by determining the Proof Flags (see 8.1.21).
The "Stop Job" command can be used to stop the currently running job. When this command is used, the device will continue to run until an acceptable stop point is reached.
Get device capabilities
(y. 5. 5)
According to device status
(0. 5. 1)
Send job
(5. 5. 1)
Get non-use
c5. 5. a)
Stop operation
Reset equipment performance
Get current status
Error response
Figure 1 Application layer graphic equipment command sequence
Equipment performance response (8.10)
Change status response or (8.9)
Operation status response 8.B
Previous performance response (8-11)
Error response (9.12)
Report status 0.5.85
8 Application layer data format for proof transmission GB/T17156.21997
All values ​​in the descriptor should be displayed according to the requirements of GB1988. The digits are right-aligned. It can be filled with 0: the mixed field of letters and numbers should be left-aligned and filled with space. 8.1 Job Descriptor
Each job must have a job descriptor. The job description line must be the first data sent by CEPS to send a job. It is 512 bytes long. Table 1 gives the section positions of the job descriptor, the length and content of the field names in bytes. Table 1 Job Description
Field Name
00--05
07-~[2
53~-92
135-138
1349-~178
179--.218
219--224
225-230
231~232
233--234
235 --260
251~254
255-258
259--260
3G1262
263--264
265-387
388-~511
Consistency level
Job description identifier
Consistency level
Proofing identifier
Job name
Original! Stream name
Original location
Business type
Hanshan equipment type
Proofing number
Paper name
Disposable name
Vertical scale factor (decimal)
Horizontal scale factor (decimal)
File processing
Color separation number
0% dot
100% dot value
Continuous tone data format
Line data format
Image set number
Reserved for TES
Reserved for manufacturer
\[OPRF\
\T\,'N\\\
Conformance level\Specifies the version of this standard used for the job, "0\ indicates no specification, "1" indicates compliance with the current version of this standard 8.1. 2 Proofing ID II
GB/T 17156.2—1997
“Proofing ID” should be a unique identifier assigned to each proof and is the main mark of the proof. (FPS is responsible for ensuring the uniqueness of this identifier in a multi-machine environment.
8. 1. 3 Job Name
The Job Name shall be the string identifier corresponding to the set of copies of the proof. 8.1.4 Provide the manufacturer and location of the equipment. For convenience, the manufacturer and location shall be given. 8.1.5 Job Type Identifier
The Job Type Identifier usually specifies "N" for normal, "T" for test, and "V" for manufacturer-specific jobs. For "separation plates" and "image sets", it is valid only when the Job Type Identifier is not "\": for test images, XP can print out user data, including the IICP" manufacturer-defined test identification.
8.1.6 Output Device Type
The Output Device Type is used to identify the type of proofing equipment. The standard value "II" defined today means that the proofing equipment is providing data to be processed, so the information in the separation plate descriptor is meaningful at this time. All other alphabetic characters are reserved for 1SC). 8.1.7 Number of proofs
"Number of proofs" refers to the number of copies required. 8.1.8 Paper Name and Oil Name
provides a place to specify the name of the paper and oil used. The DDCP supplier will provide valid names. 8.1.9 Scale Factor
The vertical scale factor shall indicate the percentage of the output image size relative to the size of the supplied image. It specifies the desired scale. Each scale factor field shall be 6 bytes long and the range of values ​​is: 001.00*-999.00. Precision: 0.0[. The internal ratio is 100.00, which means that there should be no change in this direction.
8.1. 10 File processing
"File processing" determines how the data is processed after the proof is input. The built-in value should be "0", which means to delete the data on the DDCP; "1" means to save the data. The DDCP is responsible for the use and processing of the saved data. 8.1.11 Number of color separations
"Number of color separations" is the number of single color plates and should be located in BP233-~234. The valid values ​​are "01" (representing one color) to "16" (representing 16 colors). If the "Job Type Identifier" is not "V", "00" is a valid value, meaning there is no color separation descriptor. 8.1.12 Color sequence
The color sequence (maximum 16 colors) shall be defined at BP235-250. The valid values ​​of "color sequence" are as follows (any order): "Y", "M", "C", "K" - yellow, magenta, cyan and cyan; "R", "G", "B" - red, green, blue brightness; "1"-"g" - user-definable colors or printing colors, such as pink, printing ink, etc.; "Q" - colors with specified color attributes. The color descriptors shall be continuous, left-aligned, and padded with spaces. 8.1.13 Color value
The ratio of the color values ​​contained in the data shall be related to the percentage of printed dots. , these bytes are unsigned and should be any value from 0 to 255. The relationship between the alphanumeric value and the dither value (difference, slope, intercept) should be determined by the creator of the file, but this relationship should be the same for all color separations in the same file. The color value definition should be at RP251~251 and BP255~258, and represented by the corresponding 0% dot byte value in the form of a string of digital characters (3/0 to 3/9 in 1988). Figure 2 captures the conversion relationship of the color value range, the 0% dot color value is 20, and the 1% 0% dot color value is 220. 8.1.14 Continuous modulation data format
[Danjing.com
GB/T 17156. 2—1997
120%2203
Data value
Figure 2 Example of color value conversion
There are three formats for scanning image data: pixel scanning, line scanning, and color scanning. The gate of BP25926 should contain the following values: \00\pixel scanning; \01\line scanning, \02\color scanning 8.1.14.1 Pixel scanning
A color image pattern (two color data of one color separation plate represent one color pixel) forms one line of the image. These lines form the width of the image.
In order to ensure compatibility with 16-bit machines, the number of sections in each line is an even number. Therefore, if the number of color separation plates and the number of pixels in each line are both odd numbers, there should be an extra section at the end of each line. 8. 1. 14.2 Line Scanning
One line for each color. The next line is the data for the next color (n color separation plates must have 2 lines). To ensure compatibility with 16-bit devices, the number of bits in each line should be an even number. Therefore, if the number of pixels in each line is an odd number, each line should have 16 bits.
8.1.14.3 Color Scanning
The data of all lines of one color are followed by the data of all lines of the next color (n printing colors must have 1 image). To ensure compatibility with 16-bit machines, the number of bytes per line must be an odd number. Therefore, if the number of images per line is an odd number, there will be one extra byte per line.
8.1.15 Line Drawing Data Format
The data "30" is used at BP261~262 to represent color line drawing data. 8.1, 16 Image Set Number
"Image Set Number" should be the number of non-overlapping rectangular areas to be placed on the input page. The valid values ​​of the "Image Set Number" segment at BP262-~264 are "01\ to 99". If "job If the type identifier is not "N", "00" is a valid value, which means that there is no image set descriptor. 8.2 Color separation descriptor
Each color separation specified in the job descriptor has a color descriptor with a length of 128 bytes. Table 2 shows the byte position, field name, length in bytes and content of the color separation descriptor. 8.2.1 Dot expansion table reference identifier
*Dot expansion table reference identifier" should be passed from CEPS to DDCP, that is, to provide the dedicated dot expansion table of the color separation in DDCP for reference.
8.2.2 Solid area density
"Solid area density" is the density measurement value of a certain solid area, and the value range is 0.00~5.00. 8. 2.3 Screen Monthly Line Number
“Daily Line Number\ should be the number of lines or dots per unit (inch or millimeter) of screen length, ranging from 0.0 to 500.00, with an accuracy of .01.
8.2.4 Screen Angle
GB/T 17156.2—1997
\ Screen Angle\ (degree system) should be the angle between the screen and the common reference line (horizontal axis of the image set) in the counterclockwise direction, with a value range of 0.0 ~~360.0, and an accuracy of 0.1. 8.2.5 Dot Shape
“Dot Shape” should be a named description of the dot shape. Valid names are provided by ICP manufacturers. 8.2.6 Overprint Table Reference Identifier
Overprint Table Reference Identifier should be passed from CFPS to DDCP and provide DDXCP The dot gain table for this color version is for reference: Note: This is a measure of the transfer performance of an ink when printed on another substrate compared to the ink printed on a common substrate. Table 2 Color separation plate descriptors
OG--03
04~-05
06--07
08--11
19~-23
42--45
46-~23
84~-127
8.3 Image set descriptors
Field name
Separation plate identifier
Color separation plate number
Dot gain table reference identifier, etc.
Solid area density
Screen count unit
\I\-Number of lines/in\M\-Number of lines/m
Number of screen lines (decimal)
Screen angle (decimal)
Dot shape
Overprint table reference identifier
For reserved use, the following are reserved for use by other users:
\SEPh\
\01~16
\]\ or \M\bZxz.net
Each image set has an image set descriptor with a length of 128 bytes. Table 3 shows the byte position, field name, length in bytes, and content of the image set descriptor. Table 3 Image set descriptor
00-~03
C4 ·--05
28-~37
51~~77
78--127
Field Name
Image Set Descriptor Identifier
Image Set Number
Image Relative Horizontal Position (Decimal in Meters)Image Relative Vertical Position (Decimal in Millimeters)Orientation
Line Length (Decimal in Meters)Region Width (Decimal in Millimeters)Line in PF (Continuous Rate Modulation File)
Line in AF (Line Art File)
Exists in VSF ()Vendor Specific File
Reserved for DDES Variant
Business Specific Information
"IMGb\
\o1\-.\g9\
\y\or\N\
\y\or\N\
*y\or\N\
8.3.1 Horizontal position
GB/T 17156. 2.-- 1997
Relative horizontal position is the horizontal position of the upper left corner of the image set relative to the upper left corner of the proof image area. 8.3.2 Vertical position
Relative vertical position is the vertical position of the upper corner of the image set relative to the upper left corner of the proof image area. 8-3.3 Interval, length and width
BP28~47 define the length and width of the image. Figure 3 describes the relationship between these parameters and orientation. The position and direction of the header indicate the position of the first line of data in the file. The length refers to the length of the data line in the image file, and the width indicates the distance covered by these lines.
value:
first line of data. The relationship between the image orientation direction and the orientation code is defined as follows (see Figure 3):
\” Load horizontally from the upper left corner
\01” Load vertically from the upper left corner 8. 3. 4 Storage Field
"02\=Load horizontally from the lower left corner
"03\=Load vertically from the lower left corner
BP48~50 indicates whether a continuous tone image, line drawing or manufacturer-specific file is part of the image set. 8.4 Continuous Tone Image File Description
The continuous tone image file descriptor is always located: before a continuous tone image file and is 128 bytes long. Table 4 gives the byte position, field name, and length in bytes of the continuous tone image file descriptor. Table 4 Continuous Tone Image File Description
00~-03
06~11
26--31
78~-127
1) This item is optional.
Field name
Continuous image file descriptor identifier
Corresponding image set number
Number of pixels per line
Number of lines (width)
Median of line resolution1
\1\=pixel/in,\M\=pixel/mmUnit of width resolution
\\one line/in,\M\one line/mm
Line resolution\(decimal fraction)
Width grouping ratio1(decimal fraction)
Reserved for TS/ES use
Factory-specific information
IP18~31 define the resolution in length and width directions. These fields are optional. L
\01\--\99\
B.5 Line drawing file descriptor
GB/T 17156.2 1997
The line drawing file descriptor is located before a line drawing file (color table and run-length coded data, as defined in GB/T171.56.3), and is 128 bytes long. Table 5 gives the byte position, field name, length in bytes and content of the line drawing file descriptor. Table 5 Line drawing file descriptor
12 ~17
20--25
40 ~43
78~127
Field name
Line file descriptor identifier
Corresponding image set number
Number of pixels per line
Unit of line resolution1\
\=pixel/in.\M\-image/mm
Unit of width resolution11
\]\_line/in,\M\line/mn
Line resolution (decimal)
Width resolution (decimal)
Number of valid colors used
Number of digits to represent the number of colors
Number of digits for short stroke
Number of extended stroke
Reserved for 131>125: Use
"Business-only
1) This field is optional.
BP18--31 is an optional field that specifies the resolution in the row and width directions. 8.5.1 Color Description
8. 5. 1. 1 Color table
\LAFI\
01\--\99"
"00\or\16"
The color table establishes the relationship between the serial number and the color value assigned to this serial number. It consists of a series of data items with a length of 20 bytes, and each item has a value from 2 to 256. See Table 6: Table 6 Color table format
Color serial number
Usage instructions
Transparency reserved
Single color description
The color serial number is a transparent color. For color serial number 0 or any other color defined as transparent, the value specified in the color table is reserved by the manufacturer (system) and is regarded as a non-printing color. The color serial numbers must be arranged in sequence from 1 to 255 and be in the appropriate position in the color table. For example, color serial number 1 is the second item, serial number 10 is the first item, and so on. The unused color numbers must be filled with 0s in bytes 0 to 19. Each 20-byte entry in the color table is a series of binary numbers, as shown in the table below.Note: Printing is a measure of the transfer performance of an ink when printed on another substrate, compared to the transfer performance of the ink when printed on a conventional substrate. Table 2 Color separation plate descriptors
OG--03
04~-05
06--07
08--11
19~-23
42--45
46-~23
84~-127
8.3 Image set descriptors
Field name
Separation plate number
Dot table reference identifier, etc.
Solid area density
Screen count|| tt||\I\-Number of lines/in\M\-Number of lines/m
Number of screen lines (decimal)
Screen line angle (decimal)
Dot shape
Overprint table reference identifier
For reserved use, part
is reserved for use by other users.
\SEPh\
\01~16
\]\or\
Each image set has
factory, an image set descriptor with a length of 128 bytes. Table 3 shows the byte position, field name, length in bytes, and content of the image set descriptor. Table 3 Image set descriptor
00-~03
C4 ·--05
28-~37
51~~77
78--127
Field Name
Image Set Descriptor Identifier
Image Set Number
Image Relative Horizontal Position (Decimal in Meters)Image Relative Vertical Position (Decimal in Millimeters)Orientation
Line Length (Decimal in Meters)Region Width (Decimal in Millimeters)Line in PF (Continuous Rate Modulation File)
Line in AF (Line Art File)
Exists in VSF ()Vendor Specific File
Reserved for DDES Variant
Business Specific Information
"IMGb\
\o1\-.\g9\
\y\or\N\
\y\or\N\
*y\or\N\
8.3.1 Horizontal position
GB/T 17156. 2.-- 1997
Relative horizontal position is the horizontal position of the upper left corner of the image set relative to the upper left corner of the proof image area. 8.3.2 Vertical position
Relative vertical position is the vertical position of the upper corner of the image set relative to the upper left corner of the proof image area. 8-3.3 Interval, length and width
BP28~47 define the length and width of the image. Figure 3 describes the relationship between these parameters and orientation. The position and direction of the header indicate the position of the first line of data in the file. The length refers to the length of the data line in the image file, and the width indicates the distance covered by these lines.
value:
first line of data. The relationship between the image orientation direction and the orientation code is defined as follows (see Figure 3):
\” Load horizontally from the upper left corner
\01” Load vertically from the upper left corner 8. 3. 4 Storage Field
"02\=Load horizontally from the lower left corner
"03\=Load vertically from the lower left corner
BP48~50 indicates whether a continuous tone image, line drawing or manufacturer-specific file is part of the image set. 8.4 Continuous Tone Image File Description
The continuous tone image file descriptor is always located: before a continuous tone image file and is 128 bytes long. Table 4 gives the byte position, field name, and length in bytes of the continuous tone image file descriptor. Table 4 Continuous Tone Image File Description
00~-03
06~11
26--31
78~-127
1) This item is optional.
Field name
Continuous image file descriptor identifier
Corresponding image set number
Number of pixels per line
Number of lines (width)
Median of line resolution1
\1\=pixel/in,\M\=pixel/mmUnit of width resolution
\\one line/in,\M\one line/mm
Line resolution\(decimal fraction)
Width grouping ratio1(decimal fraction)
Reserved for TS/ES use
Factory-specific information
IP18~31 define the resolution in length and width directions. These fields are optional. L
\01\--\99\
B.5 Line drawing file descriptor
GB/T 17156.2 1997
The line drawing file descriptor is located before a line drawing file (color table and run-length coded data, as defined in GB/T171.56.3), and is 128 bytes long. Table 5 gives the byte position, field name, length in bytes and content of the line drawing file descriptor. Table 5 Line drawing file descriptor
12 ~17
20--25
40 ~43
78~127
Field name
Line file descriptor identifier
Corresponding image set number
Number of pixels per line
Unit of line resolution1\
\=pixel/in.\M\-image/mm
Unit of width resolution11
\]\_line/in,\M\line/mn
Line resolution (decimal)
Width resolution (decimal)
Number of valid colors used
Number of digits to represent the number of colors
Number of digits for short stroke
Number of extended stroke
Reserved for 131>125: Use
"Business-only
1) This field is optional.
BP18--31 is an optional field that specifies the resolution in the row and width directions. 8.5.1 Color Description
8. 5. 1. 1 Color table
\LAFI\
01\--\99"
"00\or\16"
The color table establishes the relationship between the serial number and the color value assigned to this serial number. It consists of a series of data items with a length of 20 bytes, and each item has a value from 2 to 256. See Table 6: Table 6 Color table format
Color serial number
Usage instructions
Transparency reserved
Single color description
The color serial number is a transparent color. For color serial number 0 or any other color defined as transparent, the value specified in the color table is reserved by the manufacturer (system) and is regarded as a non-printing color. The color serial numbers must be arranged in sequence from 1 to 255 and be in the appropriate position in the color table. For example, color serial number 1 is the second item, serial number 10 is the first item, and so on. The unused color numbers must be filled with 0s in bytes 0 to 19. Each 20-byte entry in the color table is a series of binary numbers, as shown in the table below.Note: Printing is a measure of the transfer performance of an ink when printed on another substrate, compared to the transfer performance of the ink when printed on a conventional substrate. Table 2 Color separation plate descriptors
OG--03
04~-05
06--07
08--11
19~-23
42--45
46-~23
84~-127
8.3 Image set descriptors
Field name
Separation plate number
Dot table reference identifier, etc.
Solid area density
Screen count|| tt||\I\-Number of lines/in\M\-Number of lines/m
Number of screen lines (decimal)
Screen line angle (decimal)
Dot shape
Overprint table reference identifier
For reserved use, part
is reserved for use by other users.
\SEPh\
\01~16
\]\or\
Each image set has
factory, an image set descriptor with a length of 128 bytes. Table 3 shows the byte position, field name, length in bytes, and content of the image set descriptor. Table 3 Image set descriptor
00-~03
C4 ·--05
28-~37
51~~77
78--127
Field Name
Image Set Descriptor Identifier
Image Set Number
Image Relative Horizontal Position (Decimal in Meters)Image Relative Vertical Position (Decimal in Millimeters)Orientation
Line Length (Decimal in Meters)Region Width (Decimal in Millimeters)Line in PF (Continuous Rate Modulation File)
Line in AF (Line Art File)
Exists in VSF ()Vendor Specific File
Reserved for DDES Variant
Business Specific Information
"IMGb\
\o1\-.\g9\
\y\or\N\
\y\or\N\
*y\or\N\
8.3.1 Horizontal position
GB/T 17156. 2.-- 1997
Relative horizontal position is the horizontal position of the upper left corner of the image set relative to the upper left corner of the proof image area. 8.3.2 Vertical position
Relative vertical position is the vertical position of the upper corner of the image set relative to the upper left corner of the proof image area. 8-3.3 Interval, length and width
BP28~47 define the length and width of the image. Figure 3 describes the relationship between these parameters and orientation. The position and direction of the header indicate the position of the first line of data in the file. The length refers to the length of the data line in the image file, and the width indicates the distance covered by these lines.
value:
first line of data. The relationship between the image orientation direction and the orientation code is defined as follows (see Figure 3):
\” Load horizontally from the upper left corner
\01” Load vertically from the upper left corner 8. 3. 4 Storage Field
"02\=Load horizontally from the lower left corner
"03\=Load vertically from the lower left corner
BP48~50 indicates whether a continuous tone image, line drawing or manufacturer-specific file is part of the image set. 8.4 Continuous Tone Image File Description
The continuous tone image file descriptor is always located: before a continuous tone image file and is 128 bytes long. Table 4 gives the byte position, field name, and length in bytes of the continuous tone image file descriptor. Table 4 Continuous Tone Image File Description
00~-03
06~11
26--31
78~-127
1) This item is optional.
Field name
Continuous image file descriptor identifier
Corresponding image set number
Number of pixels per line
Number of lines (width)
Median of line resolution1
\1\=pixel/in,\M\=pixel/mmUnit of width resolution
\\one line/in,\M\one line/mm
Line resolution\(decimal fraction)
Width grouping ratio1(decimal fraction)
Reserved for TS/ES use
Factory-specific information
IP18~31 define the resolution in length and width directions. These fields are optional. L
\01\--\99\
B.5 Line drawing file descriptor
GB/T 17156.2 1997
The line drawing file descriptor is located before a line drawing file (color table and run-length coded data, as defined in GB/T171.56.3), and is 128 bytes long. Table 5 gives the byte position, field name, length in bytes and content of the line drawing file descriptor. Table 5 Line drawing file descriptor
12 ~17
20--25
40 ~43
78~127
Field name
Line file descriptor identifier
Corresponding image set number
Number of pixels per line
Unit of line resolution1\
\=pixel/in.\M\-image/mm
Unit of width resolution11
\]\_line/in,\M\line/mn
Line resolution (decimal)
Width resolution (decimal)
Number of valid colors used
Number of digits to represent the number of colors
Number of digits for short stroke
Number of extended stroke
Reserved for 131>125: Use
"Business-only
1) This field is optional.
BP18--31 is an optional field that specifies the resolution in the row and width directions. 8.5.1 Color Description
8. 5. 1. 1 Color table
\LAFI\
01\--\99"
"00\or\16"
The color table establishes the relationship between the serial number and the color value assigned to this serial number. It consists of a series of data items with a length of 20 bytes, and each item has a value from 2 to 256. See Table 6: Table 6 Color table format
Color serial number
Usage instructions
Transparency reserved
Single color description
The color serial number is a transparent color. For color serial number 0 or any other color defined as transparent, the value specified in the color table is reserved by the manufacturer (system) and is regarded as a non-printing color. The color serial numbers must be arranged in sequence from 1 to 255 and be in the appropriate position in the color table. For example, color serial number 1 is the second item, serial number 10 is the first item, and so on. The unused color numbers must be filled with 0s in bytes 0 to 19. Each 20-byte entry in the color table is a series of binary numbers, as shown in the table below.3 Image set descriptor
Field name
Separation plate number
Dot protection table reference identifier
Solid area density
Screen screen number
\I\-number of lines/in\M\-number of lines/m
Number of screen lines (|decimal)
Screen angle (|decimal)
Dot shape
Overprint table reference identifier
For reserved use, part of the image set is reserved for use by other users.
\SEPh\
\01~16
\]\ or \M\
Each image set has a
factory, an image set descriptor, the length of which is 128 bytes. Table 3 shows the byte position, field name, length in bytes, and content of the image set descriptor. Table 3 Image set descriptor
00-~03
C4 ·--05
28-~37
51~~77
78--127
Field Name
Image Set Descriptor Identifier
Image Set Number
Image Relative Horizontal Position (Decimal in Meters)Image Relative Vertical Position (Decimal in Millimeters)Orientation
Line Length (Decimal in Meters)Region Width (Decimal in Millimeters)Line in PF (Continuous Rate Modulation File)
Line in AF (Line Art File)
Exists in VSF ()Vendor Specific File
Reserved for DDES Variant
Business Specific Information
"IMGb\
\o1\-.\g9\
\y\or\N\
\y\or\N\
*y\or\N\
8.3.1 Horizontal position
GB/T 17156. 2.-- 1997
Relative horizontal position is the horizontal position of the upper left corner of the image set relative to the upper left corner of the proof image area. 8.3.2 Vertical position
Relative vertical position is the vertical position of the upper corner of the image set relative to the upper left corner of the proof image area. 8-3.3 Interval, length and width
BP28~47 define the length and width of the image. Figure 3 describes the relationship between these parameters and orientation. The position and direction of the header indicate the position of the first line of data in the file. The length refers to the length of the data line in the image file, and the width indicates the distance covered by these lines.
value:
first line of data. The relationship between the image orientation direction and the orientation code is defined as follows (see Figure 3):
\” Load horizontally from the upper left corner
\01” Load vertically from the upper left corner 8. 3. 4 Storage Field
"02\=Load horizontally from the lower left corner
"03\=Load vertically from the lower left corner
BP48~50 indicates whether a continuous tone image, line drawing or manufacturer-specific file is part of the image set. 8.4 Continuous Tone Image File Description
The continuous tone image file descriptor is always located: before a continuous tone image file and is 128 bytes long. Table 4 gives the byte position, field name, and length in bytes of the continuous tone image file descriptor. Table 4 Continuous Tone Image File Description
00~-03
06~11
26--31
78~-127
1) This item is optional.
Field name
Continuous image file descriptor identifier
Corresponding image set number
Number of pixels per line
Number of lines (width)
Median of line resolution1
\1\=pixel/in,\M\=pixel/mmUnit of width resolution
\\one line/in,\M\one line/mm
Line resolution\(decimal fraction)
Width grouping ratio1(decimal fraction)
Reserved for TS/ES use
Factory-specific information
IP18~31 define the resolution in length and width directions. These fields are optional. L
\01\--\99\
B.5 Line drawing file descriptor
GB/T 17156.2 1997
The line drawing file descriptor is located before a line drawing file (color table and run-length coded data, as defined in GB/T171.56.3), and is 128 bytes long. Table 5 gives the byte position, field name, length in bytes and content of the line drawing file descriptor. Table 5 Line drawing file descriptor
12 ~17
20--25
40 ~43
78~127
Field name
Line file descriptor identifier
Corresponding image set number
Number of pixels per line
Unit of line resolution1\
\=pixel/in.\M\-image/mm
Unit of width resolution11
\]\_line/in,\M\line/mn
Line resolution (decimal)
Width resolution (decimal)
Number of valid colors used
Number of digits to represent the number of colors
Number of digits for short stroke
Number of extended stroke
Reserved for 131>125: Use
"Business-only
1) This field is optional.
BP18--31 is an optional field that specifies the resolution in the row and width directions. 8.5.1 Color Description
8. 5. 1. 1 Color table
\LAFI\
01\--\99"
"00\or\16"
The color table establishes the relationship between the serial number and the color value assigned to this serial number. It consists of a series of data items with a length of 20 bytes, and each item has a value from 2 to 256. See Table 6: Table 6 Color table format
Color serial number
Usage instructions
Transparency reserved
Single color description
The color serial number is a transparent color. For color serial number 0 or any other color defined as transparent, the value specified in the color table is reserved by the manufacturer (system) and is regarded as a non-printing color. The color serial numbers must be arranged in sequence from 1 to 255 and be in the appropriate position in the color table. For example, color serial number 1 is the second item, serial number 10 is the first item, and so on. The unused color numbers must be filled with 0s in bytes 0 to 19. Each 20-byte entry in the color table is a series of binary numbers, as shown in the table below.3 Image set descriptor
Field name
Separation plate number
Dot protection table reference identifier
Solid area density
Screen screen number
\I\-number of lines/in\M\-number of lines/m
Number of screen lines (|decimal)
Screen angle (|decimal)
Dot shape
Overprint table reference identifier
For reserved use, part of the image set is reserved for use by other users.
\SEPh\
\01~16
\]\ or \M\
Each image set has a
factory, an image set descriptor, the length of which is 128 bytes. Table 3 shows the byte position, field name, length in bytes, and content of the image set descriptor. Table 3 Image set descriptor
00-~03
C4 ·--05
28-~37
51~~77
78--127
Field Name
Image Set Descriptor Identifier
Image Set Number
Image Relative Horizontal Position (Decimal in Meters)Image Relative Vertical Position (Decimal in Millimeters)Orientation
Line Length (Decimal in Meters)Region Width (Decimal in Millimeters)Line in PF (Continuous Rate Modulation File)
Line in AF (Line Art File)
Exists in VSF ()Vendor Specific File
Reserved for DDES Variant
Business Specific Information
"IMGb\
\o1\-.\g9\
\y\or\N\
\y\or\N\
*y\or\N\
8.3.1 Horizontal position
GB/T 17156. 2.-- 1997
Relative horizontal position is the horizontal position of the upper left corner of the image set relative to the upper left corner of the proof image area. 8.3.2 Vertical position
Relative vertical position is the vertical position of the upper corner of the image set relative to the upper left corner of the proof image area. 8-3.3 Interval, length and width
BP28~47 define the length and width of the image. Figure 3 describes the relationship between these parameters and orientation. The position and direction of the header indicate the position of the first line of data in the file. The length refers to the length of the data line in the image file, and the width indicates the distance covered by these lines.
value:
first line of data. The relationship between the image orientation direction and the orientation code is defined as follows (see Figure 3):
\” Load horizontally from the upper left corner
\01” Load vertically from the upper left corner 8. 3. 4 Storage Field
"02\=Load horizontally from the lower left corner
"03\=Load vertically from the lower left corner
BP48~50 indicates whether a continuous tone image, line drawing or manufacturer-specific file is part of the image set. 8.4 Continuous Tone Image File Description
The continuous tone image file descriptor is always located: before a continuous tone image file and is 128 bytes long. Table 4 gives the byte position, field name, and length in bytes of the continuous tone image file descriptor. Table 4 Continuous Tone Image File Description
00~-03
06~11
26--31
78~-127
1) This item is optional.
Field name
Continuous image file descriptor identifier
Corresponding image set number
Number of pixels per line
Number of lines (width)
Median of line resolution1
\1\=pixel/in,\M\=pixel/mmUnit of width resolution
\\one line/in,\M\one line/mm
Line resolution\(decimal fraction)
Width grouping ratio1(decimal fraction)
Reserved for TS/ES use
Factory-specific information
IP18~31 define the resolution in length and width directions. These fields are optional. L
\01\--\99\
B.5 Line drawing file descriptor
GB/T 17156.2 1997
The line drawing file descriptor is located before a line drawing file (color table and run-length coded data, as defined in GB/T171.56.3), and is 128 bytes long. Table 5 gives the byte position, field name, length in bytes and content of the line drawing file descriptor. Table 5 Line drawing file descriptor
12 ~17
20--25
40 ~43
78~127
Field name
Line file descriptor identifier
Corresponding image set number
Number of pixels per line
Unit of line resolution1\
\=pixel/in.\M\-image/mm
Unit of width resolution11
\]\_line/in,\M\line/mn
Line resolution (decimal)
Width resolution (decimal)
Number of valid colors used
Number of digits to represent the number of colors
Number of digits for short stroke
Number of extended stroke
Reserved for 131>125: Use
"Business-only
1) This field is optional.
BP18--31 is an optional field that specifies the resolution in the row and width directions. 8.5.1 Color Description
8. 5. 1. 1 Color table
\LAFI\
01\--\99"
"00\or\16"
The color table establishes the relationship between the serial number and the color value assigned to this serial number. It consists of a series of data items with a length of 20 bytes, and each item has a value from 2 to 256. See Table 6: Table 6 Color table format
Color serial number
Usage instructions
Transparency reserved
Single color description
The color serial number is a transparent color. For color serial number 0 or any other color defined as transparent, the value specified in the color table is reserved by the manufacturer (system) and is regarded as a non-printing color. The color serial numbers must be arranged in sequence from 1 to 255 and be in the appropriate position in the color table. For example, color serial number 1 is the second item, serial number 10 is the first item, and so on. The unused color numbers must be filled with 0s in bytes 0 to 19. Each 20-byte entry in the color table is a series of binary numbers, as shown in the table below.4 Continuous tone image file description
The continuous tone image file descriptor is always located: before a continuous tone image file, with a length of 128 bytes. Table 4 gives the byte position, field name, and length in bytes of the continuous tone image file descriptor. Table 4 Continuous tone image file description
00~-03
06~11
26--31
78~-127
1) This item is optional.
Field name
Continuous image file descriptor identifier
Corresponding image set number
Number of pixels per line
Number of lines (width)
Median of line resolution1
\1\=pixel/in,\M\=pixel/mmUnit of width resolution
\\one line/in,\M\one line/mm
Line resolution\(decimal fraction)
Width grouping ratio1(decimal fraction)
Reserved for TS/ES use
Factory-specific information
IP18~31 define the resolution in length and width directions. These fields are optional. L
\01\--\99\
B.5 Line drawing file descriptor
GB/T 17156.2 1997
The line drawing file descriptor is located before a line drawing file (color table and run-length coded data, as defined in GB/T171.56.3), and is 128 bytes long. Table 5 gives the byte position, field name, length in bytes and content of the line drawing file descriptor. Table 5 Line drawing file descriptor
12 ~17
20--25
40 ~43
78~127
Field name
Line file descriptor identifier
Corresponding image set number
Number of pixels per line
Unit of line resolution1\
\=pixel/in.\M\-image/mm
Unit of width resolution11
\]\_line/in,\M\line/mn
Line resolution (decimal)
Width resolution (decimal)
Number of valid colors used
Number of digits to represent the number of colors
Number of digits for short stroke
Number of extended stroke
Reserved for 131>125: Use
"Business-only
1) This field is optional.
BP18--31 is an optional field that specifies the resolution in the row and width directions. 8.5.1 Color Description
8. 5. 1. 1 Color table
\LAFI\
01\--\99"
"00\or\16"
The color table establishes the relationship between the serial number and the color value assigned to this serial number. It consists of a series of data items with a length of 20 bytes, and each item has a value from 2 to 256. See Table 6: Table 6 Color table format
Color serial number
Usage instructions
Transparency reserved
Single color description
The color serial number is a transparent color. For color serial number 0 or any other color defined as transparent, the value specified in the color table is reserved by the manufacturer (system) and is regarded as a non-printing color. The color serial numbers must be arranged in sequence from 1 to 255 and be in the appropriate position in the color table. For example, color serial number 1 is the second item, serial number 10 is the first item, and so on. The unused color numbers must be filled with 0s in bytes 0 to 19. Each 20-byte entry in the color table is a series of binary numbers, as shown in the table below.4 Continuous tone image file description
The continuous tone image file descriptor is always located: before a continuous tone image file, with a length of 128 bytes. Table 4 gives the byte position, field name, and length in bytes of the continuous tone image file descriptor. Table 4 Continuous tone image file description
00~-03
06~11
26--31
78~-127
1) This item is optional.
Field name
Continuous image file descriptor identifier
Corresponding image set number
Number of pixels per line
Number of lines (width)
Median of line resolution1
\1\=pixel/in,\M\=pixel/mmUnit of width resolution
\\one line/in,\M\one line/mm
Line resolution\(decimal fraction)
Width grouping ratio1(decimal fraction)
Reserved for TS/ES use
Factory-specific information
IP18~31 define the resolution in length and width directions. These fields are optional. L
\01\--\99\
B.5 Line drawing file descriptor
GB/T 17156.2 1997
The line drawing file descriptor is located before a line drawing file (color table and run-length coded data, as defined in GB/T171.56.3), and is 128 bytes long. Table 5 gives the byte position, field name, length in bytes and content of the line drawing file descriptor. Table 5 Line drawing file descriptor
12 ~17
20--25
40 ~43
78~127
Field name
Line file descriptor identifier
Corresponding image set number
Number of pixels per line
Unit of line resolution1\
\=pixel/in.\M\-image/mm
Unit of width resolution11
\]\_line/in,\M\line/mn
Line resolution (decimal)
Width resolution (decimal)
Number of valid colors used
Number of digits to represent the number of colors
Number of digits for short stroke
Number of extended stroke
Reserved for 131>125: Use
"Business-only
1) This field is optional.
BP18--31 is an optional field that specifies the resolution in the row and width directions. 8.5.1 Color Description
8. 5. 1. 1 Color table
\LAFI\
01\--\99"
"00\or\16"
The color table establishes the relationship between the serial number and the color value assigned to this serial number. It consists of a series of data items with a length of 20 bytes, and each item has a value from 2 to 256. See Table 6: Table 6 Color table format
Color serial number
Usage instructions
Transparency reserved
Single color description
The color serial number is a transparent color. For color serial number 0 or any other color defined as transparent, the value specified in the color table is reserved by the manufacturer (system) and is regarded as a non-printing color. The color serial numbers must be arranged in sequence from 1 to 255 and be in the appropriate position in the color table. For example, color serial number 1 is the second item, serial number 10 is the first item, and so on. The unused color numbers must be filled with 0s in bytes 0 to 19. Each 20-byte entry in the color table is a series of binary numbers, as shown in the table below.
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