This part of GB/T 20494 specifies the characteristics of software test targets that are electronically generated and will be used in COM recording systems that accept electronic forms. The components of the target can be used to verify or test certain functions of the COM recorder so that the image quality can be evaluated or maintained. The determination of the components of the software test target is independent of the recording method (i.e. laser scanner, cathode ray tube, light emitting diode, etc.). GB/T 20494.1-2006 Microfilming Quality control of COM recorders using a single internal display system to generate images Part 1: Characteristics of software test targets GB/T20494.1-2006 Standard download decompression password: www.bzxz.net
This part of GB/T 20494 specifies the characteristics of software test targets that are electronically generated and will be used in COM recording systems that accept electronic forms. The components of the target can be used to verify or test certain functions of the COM recorder so that the image quality can be evaluated or maintained. The determination of the components of the software test target is independent of the recording method (ie, laser scanner, cathode ray tube, light emitting diode, etc.).

1CS37.080
National Standard of the People's Republic of China
GB/T 20494. 1—2006/ISO 14648-1:2001Micrographics-
Quality control of CoM recorders that generate images usinga single internal display-Part 1: Characleristics of the test target(IS0) 14648-1:2001,IDT)
2006-D8-23Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
2007-02-01Implementation
GB/T20494.1—2006/IS0 14648-1:2001GB/T20494 Quality control of COM recorders using a single internal display system to generate images using microfilm technology" is divided into two parts:
Part 1: Characteristics of software test standards: Part 2: Method of use
This part is the first part of GB/T20494, which is equivalent to ISO14648-1:2001 "Quality control of COM recorders using a single internal display system to generate images using microfilm technology Part 1: Characteristics of software test standards" (English version). This part is proposed and coordinated by the National Technical Committee for Standardization of Document Imaging Technology (SAC/TC86). This part was drafted by the National Technical Committee for Standardization of Document Imaging Technology. The main drafters of this part are: Li Ming, Zhang Bin, Kou Ruichai. This part is published for the first time.
GB/T 20494.1-—2006/IS014648-1:2001 Introduction
This part of GB/T 20494 provides specifications for the characteristics of software test standards used to evaluate the quality of images produced using COM recorders. 1 Scope
CB/T 20494.1—2006/IS0 14648-1.2001 Micrographics Quality control of COM recorders using a single internal display system to produce images Part 1: Characteristics of software test standards
This part of GR/I 20494 specifies the characteristics of software test standards for COM recording systems that are produced electronically and are to be used in electronically acceptable forms. The components of the target plate can be used to check or test certain dynamic functions of the recorder+ so that the quality of the virtual image can be evaluated or maintained. The determination of the components of the software test target plate is independent of the recording method (i.e. laser scanner, cathode ray tube, light emitting diode, etc.).
2 Normative references
The provisions in the following documents become the provisions of this part through reference to this part of GB/I20-494. For all dated referenced documents, all subsequent amendments (excluding errors) or revisions are not applicable to this part. However, the parties to the agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions apply to this part.|| GB/T6159.1-2003 Microfilm Vocabulary Part 1: -Terms (ISO6196-1:1993.MOD) (B/T6159.5-2000 Microfilm Vocabulary Part 5: Image quality, readability and inspection (ISO6196-1:1987) GB/T6159.6-2003 Microfilm Vocabulary Part 6: Equipment (ISO6196-6:1992, MOD) G13/T6159.7-2000 Microfilm Vocabulary Part 7: Computerized microfilming (ISO6196-7:1992) Part, Geometric conditions for transmission density ISO 5-2:1991
ISO5-3:1995
3 Terms and definitions
Photographic density measurement Part 3: Spectral conditions GB/T 6159.12003, GB/T6159.5—2000, GB/T6159.6—2000 and GB/T The following terms and definitions established in 6159.7-2000 and the following apply to this standard. 3.1
dot
The smallest unit that can be recorded on film by a COM recording system. 4 Test targets
Two test targets are specified. Target 1 (see Figure 2) is suitable for COM systems with limited bitmap memory. The number and complexity of components on the test target are limited to a few basic types. For COM systems with larger bitmap memory capacity, target 2 (see Figure 3) has more and more complex components. 4.2 Dot spacing
The center-to-center spacing of two consecutive dots on the film is related to the resolution specified by the original full size. For example, if the original specifies a resolution of 210 dpi, then the full-size dot spacing is 0.004 2 in (about 0.11 mm). If recorded at a reduction ratio of 48× to 1
GB/T 20494. 1-2006/ISO 14648-1:2001 microfilm, the pixel span on the film is 0.000087in (about 0.0022mm). As shown in Figure 1, the dot overlap is equal to the ratio of diameter to center-to-center span. The diameter of the dot is usually larger than the center-to-center span, so that the recording of consecutive dots is smoothed to form a pattern: the ratio of dot diameter to dot span is usually a factor selected by the manufacturer of the COM recording system between 1.3 and 1.5. In this way, the dot diameter varies with the reduction ratio and resolution. ——dot;
2—diameter;
3--center-to-center span.
Figure 1 Dot weight and flexibility
4.3 Grid structure
The grid shall consist of 132 cells in the horizontal direction and 64 cells in the vertical direction, which form the columns and rows into which characters can be placed. The grid dimensions shall conform to the text dimensions, i.e. 335.3 mm horizontally and 270.9 mm vertically at full size.
4.4 Border
A line of a single point width shall enclose Plate 1 and Plate 2 at a distance of one unit size from the grid pattern, see Figures 2 and 3. In grid pattern terms, the border dimensions are 134 columns by 66 rows. The border shall be generated at the extreme edge of the unit specified in 4.3.
4.5 Test Pattern
The test pattern shall consist of five test patterns, each of which shall consist of two groups of perpendicular patterns, with the six lines and five spaces of equal width, the line widths in points, and numbered from 1 to 5, and each line shall be 48 points in length. The distances between the horizontal and vertical groups shall be 10 points and 27 points respectively. Plate 1 shall have two test patterns in the upper left and upper right corners of the plate. Six test patterns shall be provided on the standard plate 2, one at each corner and two near the center of the standard plate. The smallest pattern in each test pattern shall be located at the position specified in Table 1. NOTE: Depending on the adjustment of the COM recording system, the accuracy of the focusing, and the degree of point repetition designed for the system to make the recording of consecutive points disappear into lines (see Figure 1), one or more patterns of a test pattern may be indistinguishable. However, when there is a change in the performance of the system, one can use a microscope to distinguish them.
4.6 Density measurement area
Three density areas shall be provided, each of which is 40 columns wide and 24 rows high and is framed by a box with a line width of two dots. There shall be a blank area of ​​one column width between the sides of the box and the density area, and a blank area of ​​half a row height between the top and bottom of the box and the density area.
The measurement area on the right should be generated as a solid (all points are generated), the measurement area in the middle should be generated as an empty (no points are generated), and the measurement area on the left should be generated as a grid with a line width of one point and a spacing of two points. A border with a width of two points should be generated in the central measurement area to outline the blank area.
The position of each measurement relative to the upper left corner of the outer box should comply with the provisions of Table 2. Standard
EHNEHN10
EHNEHN12
EHNEHN18
GB/T 20494. 1--2006/IS0 14648-1:2001m
EHNEHN1OEHNEHN
FHNEHN 12EHNEHN
EHNEHNTSEHNEHN
Figure 2 Example of the structure of the target plate 1
The position of the test pattern
10 EHNEHN
I2.EHNEHN
ISEHNEHN
GB/T20494.1--2006/IS014648-1:200142)
FHNEHN10
EHNEHN12
4.7 Oblique lines
Blood measuring area type
Shadow proof
Figure 3 Structure example of plate 2
Table 2 Position of density measurement area
There are two oblique lines with one point in the scale, and their position is shown in Figure 3. The line is decomposed into the entire unit passing through the end point. Table 3 Position of the oblique line
4.8COM character readability zone
Upper position
22 columns.18 rows
11 columns,18
Upper left corner coordinate
90 columns,32 rows
2 columns-32 rows
46 columns,39 rows
10EHNEHN
EHNEHN
Lower position
8 columns 26 rows
[25 columns,26 rows
The basic character pattern used to judge readability should be composed of uppercase Dan E, H and N generated by the C()M recorder, with a character spacing of 0.394 characters, 0.472 characters and .591 characters per millimeter. The positions of the various areas are shown in Table 4 and Figures 2 and 3. 4
Center (two patterns, only for Plate 1)
4.9 Alternative font area
GB/T20494.1—2006/ISO14648-1:2001 Table 4 Character readability test positionwwW.bzxz.Net
Starting
Starting line
The area from row 16 to row 28 and from column 32 to column 102 should be reserved for alternative fonts. Other fonts suitable for typical purposes can be used.
4.10 Measuring scale
Plate 2 should contain two straight lines for measuring scale. The horizontal line should start from column 6, row 29: the length of the line should be such that the corresponding straight line length on the microfilm is 6.35 mm. If multiple reduction ratios are available, the lines should be marked so that the length of the relevant part of the straight line from the starting point on the microfilm image is 6.35 mm. The relevant reduction ratio (e.g. 1:24, 1:48) should be indicated on the test plate. The vertical line should start at column 27, row 65, and the length of the line should be such that the length of the corresponding straight line on the 1:24 microfilm image is 6.35 mm. If multiple reduction ratios are available, the lines should be marked so that the length of the relevant part of the straight line from the starting point on the microfilm image is 6.35 mm. If a reduction ratio of 1:48 is used, the marking should be such that the length of the relevant part of the straight line from the starting point on the microfilm image is 3.18 mm. The vertical line should be cut off in the middle so as not to penetrate the density measurement area or the horizontal scale. The cut should be at least one row below the closed side of the density measurement area and parallel to the top ten horizontal scales. 4.11 Title Area
When necessary: ​​White Rows 3 to 14 and columns 32 to 102 should be reserved for identification information.
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