GB/T 20493.3-2018Electronic imaging -- Test target for scanning of office documents -- Part 3: Test target for use in lower resolution applications (English PDF)
电子成像 办公文件扫描用测试标板 第3部分：较低解像力应用测试标板
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Issued by
State Administration for Market Regulation, China National Standardization Administration
Level / Type
National · Recommended
Issue date
December 28, 2018
Implementation date
July 1, 2019
Scope
GB/T 20493.3-2018 is the English-translated version of 电子成像 办公文件扫描用测试标板 第3部分：较低解像力应用测试标板.
GB/T 20493.3-2018 is the Chinese standard "Electronic imaging -- Test target for scanning of office documents -- Part 3: Test target for use in lower resolution applications".
Its scope clause reads: This part of GB/T 20493 specifies a test target for evaluating lower resolution reflective scanning systems over time. Whether to maintain consistent output quality.
This section applies to the evaluation of the output quality of black and white, color scanners that scan black and white, color office documents with or without halftones.
This section does not apply to scanners that scan transparent or translucent documents. Its clauses include terms and definitions.
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Document preview — GB/T 20493.3-2018
National Standard of the People's Republic of China
- ICS
- 37.080
- Classification
- A 14
Issued by: State Administration for Market Regulation, China National Standardization Administration
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Use of this part
- 4.1 General
- 4.2 Factors affecting quality
- 5 test target
- 5.1 General
- 5.2 Description of test elements
- 5.3 Base
- 5.4 Double-sided scanner test target
- 6 Procedure
- 6.1 System Initial Settings
- 6.2 Use of image enhancement technology and image compression technology
- 6.3 Test Target Scan
- 6.4 Internal Test System
- 6.5 Frequency
- 7 Evaluation of the results
- 7.1 Evaluation
- 7.2 Screen resolution
- 8 Test Method
- 8.1 Test Element
- 8.2 Test procedure
1 Scope
This part of GB/T 20493 specifies a test target for evaluating lower resolution reflective scanning systems over time.
Whether to maintain consistent output quality.
This section applies to the evaluation of the output quality of black and white, color scanners that scan black and white, color office documents with or without halftones.
This section does not apply to scanners that scan transparent or translucent documents.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 6161-2008 Description and application of the ISO 2 resolution test chart for microfilming technology (ISO 3334.2006,
IDT)
GB/T 18405-2008 Characteristics of microfilming ISO characters and ISO 1 test charts and their use (ISO 446.
2004, IDT)
GB/T 20225.1-2017 Vocabulary of electronic document management - Part 1. Imaging of electronic documents (ISO 12651-1.2012, IDT)
GB/T 20493.1-2006 Test documentation for black and white scanning of electronic imaging office documents - Part 1. Characteristics (ISO 12653-1.
2000, IDT)
GB/T 20493.2-2006 Test documents for black and white scanning of electronic imaging office documents - Part 2 (ISO 12653-2.2000, IDT)
Photographic density measurement - Part 4. Reflection density geometry (Photography andgraphic technology-Densitymeasurements-Part 4. Geometricconditionsforreflectiondensity)
3 Terms and definitions
The following terms and definitions as defined in GB/T 20225.1-2017 apply to this document.
3.1 Test element
The pattern given on the label.
Examples. millimeter ruler, grayscale spectrum, circle.
3.2 Continuous tone
The hue changes in the document expressed in different density regions.
3.3 Lower resolution application
A scanning system configured to scan at a resolution of less than 300 dpi.
GB/T 16784 | WB/T 1120 | GB/T 21737 | GB/T 46917.1 | GB/T 13967 | […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 6161-2008Micrographics -- ISO resolution test chart No.2 -- Description and use
- GB/T 18405-2008Micrographics -- ISO character and ISO test chart No.1 -- Description and use
- GB/T 20225.1-2017Electronic document management -- Vocabulary -- Part 1: Electronic document imaging
- GB/T 20493.1-2006Electronic imaging -- Test target for the black-and-white scanning of office documents -- Part 1: Characteristics
- GB/T 20493.2-2006Electronic imaging -- Test target for the black-and-white scanning of office documents -- Part 2: Method of use
ISO 2 · ISO 3334.2006 · ISO 1 · ISO 446 · ISO 12651 · ISO 12653
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Related Standards
GB/T 18405-2008 — Micrographics -- ISO character and ISO test chart No.1 -- Description and use
GB/T 20225.1-2017 — Electronic document management -- Vocabulary -- Part 1: Electronic document imaging
GB/T 20493.1-2006 — Electronic imaging -- Test target for the black-and-white scanning of office documents -- Part 1: Characteristics
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