This standard specifies the characteristics of test slides and test data used to control the quality of alphanumeric COM microforms. This standard only applies to COM recorders using format slides. GB/T 17294.1-1998 Microfilming technology - Quality control of alphanumeric computer output microforms - Part 1: Characteristics of test slides and test data GB/T17294.1-1998 Standard download decompression password: www.bzxz.net
This standard specifies the characteristics of test slides and test data used to control the quality of alphanumeric COM microforms. This standard only applies to COM recorders using format slides.

GB/T17294.1—1998
This standard is equivalent to ISO8514-1:1992 Microfilm technology - Alphanumeric computer output microforms - Quality control Part 1: Characteristics of test slides and test data. The application methods of test slides and test data are specified in Part 2 of this standard. This standard was proposed by the National Technical Committee for the Promotion of Microfilm Technology Standardization. This standard is under the jurisdiction of the China Institute of Standardization and Information Classification and Coding. This standard was drafted by the Fourth Branch of the National Technical Committee for the Promotion of Microfilm Technology Standardization. The main drafters of this standard are: Liu Peiping, Zeng Jinxing, Ding Ling, Feng Wei, Liu Dingjun. GR/T17294.11998
ISO (International Organization for Standardization IS ()) is a global federation of national standardization organizations (ISO) member organizations. The drafting of international standards is usually carried out by ISO () technical committees. Any member organization that is interested in a research item of an established technical committee has the right to participate in the work of the committee. International organizations, governments and non-governmental organizations that have liaison with ISO can also participate in this cooperation. ISO has a close cooperative relationship with the International Electrotechnical Commission (IEC) in all aspects of standardization related to electrotechnical technology. The international standard drafts formally adopted by the technical committee are circulated among the member organizations for voting. The publication of an international standard requires at least 75% of the member organizations to vote in favor. The Internet standard ISO8514-1 was drafted by the ISO/TC171 Technical Committee, which is responsible for formulating international standards for microforms and optical storage for the recording, preservation and use of documents and images. Under the general title of Microfilming -- Digitally coded computer output microforms -- Quality control, ISO 8514 consists of the following parts:
Part 1: Characteristics of test slides and test data Part 2: Methods
GB/T 172941—1998
The continued development and expansion of alphanumeric computer output microforms (alphanumeric COM) for information storage has necessitated the establishment of effective and reliable methods by which the quality of images can be controlled. The development of these methods is essential if suitable output is to be obtained of consistent quality. In the production of microforms containing alphanumeric information, it is of paramount importance that the information presented to the user should be legible: this principle should be followed for all microforms used, whether original negatives (first generation) or copies. GB/T 172941 specifies methods for establishing and controlling the quality of computer output microforms (COM), together with detailed instructions for the standard test slide format and test data to be used in the application of the methods. It applies to microforms containing variable data generated by cathode ray arms, light emitting diodes or lasers and fixed data contained on format slides. In accordance with ISO 9923, the effective reduction ratio is 124 to 1:48. This series of standards applies only to COM recorders using format slides. Since it is impossible to provide a single standard for the various systems and equipment configurations in use, it is necessary to develop test specifications by which the user can establish and maintain a certain level of performance using a minimum of dedicated equipment. To perform the tests described in this standard, a densitometer and microscope are most required. If these equipment are not available, the tests can be performed using only a microform reader provided that a reference sample is established.
The method requires test slides and test data generated from a COM image generator. National Standard of the People's Republic of China
Micrographics
Quality Control of Alphanumeric Computer Output Microforms Part 1: Characteristics of the Test Slide and Test Data1 Scope
7B/117294.1 -1998
idtis08514-1:1992
This standard specifies the characteristics of the test slide and test data used to control the quality of alphanumeric COM microforms. This standard is only applicable to COM recorders using format slides: 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision. Parties using this standard should investigate the possibility of using the latest versions of the following standards. Members of IEC and ISO hold currently valid international standards. GB/T 17294.2--1998 Microfilming technology, quality control of digital computer output microfilms Part 1: Methods ISO 5-2:1991 Photography — Density measurement: Part 2: Geometric conditions for transmission density ISO 5-3:1984 Photography — Density measurement — Part 3: Spectral conditions ISO 5-4:1983 Photography — Density measurement — Part 4: Geometric conditions for reflection density ISO 446:1991 Microfilming technology — Characteristics and application of ISO characters and ISO 1 test charts ISO 3334:1989 Microfilming technology — ISO 2 resolution test chart — Characteristics and application ISO 6196-7:1992 Microfilming technology vocabulary Part 7: Computer microfilm ISO 9923:1994 Microfilming technology — Arrangement of images on A6 transparency microfilms 3 Definitions
This standard adopts the definitions in ISO 6196-7 and the following definitions. 3.1 Test slide: A format slide used to check the output quality of the COM system: 4 Description of the original drawing
The original drawing for making the test slide should be as shown in Figure 1 and comply with the descriptions of 4.1 to 1.6. 1) The drawing in Figure 1 is a positive image, while the actual test slide is a negative image. Approved by the State Bureau of Technical Supervision on March 27, 1998 and implemented on October 1, 1998. GB/T17294. 1 --1998. 2 31751606465 2sssae 88 ## 863 Figure 1 Original drawing (This drawing cannot be used for test) Note 1: All dimensions are specified in accordance with the common dimensions (270, am × 335.3 n) specified in 1.1. The values ​​given by the light sheet should be checked according to the ratio of 1:1. The method is to multiply these values ​​by the reduction ratio specified by the manufacturer (see 5.2). The quality of the original pattern shall be sufficient to enable the test slide to comply with the requirements of this standard. 4.1 Positioning grid (T
The positioning grid shall consist of a number of symbols in a standard grid of 6 lines of 132 characters per line, distributed on the edges and center lines of the test slide.
The height of the grid is 270.9 mm and the width is 335.3 mm. The permissible deviation of its size is ±0.1 mm1. The spacing of the symbols along the X-axis is 4.233 mm (1/6 mm) and the spacing between the symbols along the Y-axis is 4.233 mm (1/6 mm). GB/T 17294.11998
The center of each line of the grid shall be on the corresponding theoretical axis of the grid, with an permissible deviation of ±0.02 mm. The line width shall be between 0.12 mm and 0.17 mm; regardless of the line width selected, the permissible deviation shall be ±0.01 mm. 4.2 Density Measurement Base Area
The density measurement area shall consist of two circles, each with a minimum diameter of 95 mm, so that they can still be measured with a densitometer after a 1:48 reduction. One circle is a 50%* halftone screen pattern of 25 lines per centimeter (65 lines per inch) (A), and the other circle is completely opaque (B). The visual reflection density difference between the opaque circle and the original background shall be at least 2.0 when measured in accordance with ISO 5-3 and ISO 5-4. 4.3 Test Chart Area ③
Test Chart Area ISO 1 test chart and ISO 2 resolution test chart in accordance with ISO 3334 standard requirements. The number of characters that make up the ISO 1 test chart is 45 to 280 (an extension of the ISO 1 test chart specified in ISO 446), and the number of patterns of the ISO 152 test chart is 1 to 10.
4.4 Density Balance Area 4
The density balance area contains nine halftone images with 25 lines per centimeter (65 lines per inch) and 10% to 905% increments of 10%. Each halftone image has a number, half of which is white and half is black, which is used as a reference for gradient analysis. 4.5COM character clarity test area @
COM character clarity test area consists of five identical patterns, distributed in the center and near the four corners of the test slide: Each pattern contains two characters "E\ and \II\, and the same characters are arranged in pairs from 1 to 1 and H. The height and width of each two groups of characters increase according to the data shown in Table 1, and the width of the strips in the vertical direction increases inversely according to the data shown in Table 2. The height H of the character is the vertical distance between the bottom line and the back line of the character (see Figure 2), and the width L of the character is measured on the entire character in a similar way. The horizontal spacing between the characters is the distance of two characters, so that it is easier to align the image generator characters with the image of the test slide. 4.6 Control area of ​​test slide data @ The control area should contain data examples used to prepare the standard format. Characters without village lines and ink extensions should be used. Human handwritten letters The minimum spacing for heights of 1.60 mm, 1.85 mm, 2.10 mm, 2.35 mm and 2.60 mm should be 3/2 times the height of the capital letter. Do not use bold or light characters. E
Figure 2 Example of character measurement
Friends 1 Variation of character length and width
Character lengthbZxz.net
Character width
1) The maximum character width leaves enough space between two characters. 3
Table 2 Variation of line width
Line width
5 Quality of test slides
The information given in this clause can be used to guide the manufacturers and users of test slides in formulating technical specifications. 2) The ratio of the area of ​​50% of the color interval points to the total area. mn
5.1 Container
The test slide should be placed in a rigid container. 5.2 Reduction ratio
CB/T 17294-1—1998
The reduction ratio of the test slide relative to the 1:1 ratio shall be the nominal ratio indicated by the manufacturer of the COM recorder, and its permissible deviation is ± 0.05%.
5.3 Polarity
The test slide shall be a negative image, i.e. the background is black and the lines are transparent. 5.4 Degrees
Measured in accordance with the requirements of IS05-2 and ISO5-3, the visual transmission density of the transparent area shall not exceed 0.20 and the background density shall not be less than 2.0.
5.5 Defects
In the image area of ​​the test slide, there shall be no defects larger than 0.05 mm in size at a ratio of 1:1 to the original image (see Chapter 4). 5.6 Quality of reproduced graphics
The production quality of the test slide shall ensure that the characters with the identification number 80 in the IS01 test chart or the ISO 2 The pattern with a spatial frequency number of 5.0 in the resolution test chart can be distinguished on the test slide. The allowable deviation range of the rated width of the black and transparent lines on the test chart is 10%.
5.7 Grid Certificate
The manufacturer shall provide a certificate of conformity with the requirements of this standard for each test slide. 6 Description of test data (see Figure 3)
The data shall be generated in the following areas:
6.1 Positioning area
The positioning area consists of the letter "H" generated on the entire grid area. 6.2 COM character control area
The COM character control area consists of the letters "E\ and \H\, and their exact positions are shown in Figure 3. They should be parallel to the same characters on the test slide.
6.3 COM character group area)
In this area, according to the available space, there should be a group of typical C()M characters, including uppercase letters, numbers and symbols and appropriate lowercase letters, arranged in alphabetical order. Make a row of outer Symbols with similar shapes are also very useful, such as: I, 1, 0, 0, Q, B, 8, G, 6, 5, SZ, 7, 2, etc. The national standard for the diagnosis and treatment of diabetes mellitus is as follows: The national standard for the diagnosis and treatment of diabetes mellitus is as follows: The national standard for the diagnosis and treatment of diabetes mellitus is as follows: 17294- 1—1998
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GB/T 17294- 1—1998
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under the standard and sugar is different research and non-sugar adjustment relative treatment fine sugar guide sugar the main body sugar and sugar sugar sugar the main cause sugar call thyroid patients and the person's parameter related treatment figure 3 test data
national management of the value of the guide guide special guide complement bureau 1.1:48
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GB/T 17294- 1—1998
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under the standard and sugar is different research and non-sugar adjustment relative treatment fine sugar guide sugar the main body sugar and sugar sugar sugar the main cause sugar call thyroid patients and the person's parameter related treatment figure 3 test data
national management of the value of the guide guide special guide complement bureau 1.1:48
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