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GB/T 42978-2023 English PDF

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US$349.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42978-2023: Digital cameras - Shading measurements
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42978-2023	349	Add to Cart	4 days	Digital cameras - Shading measurements	Valid

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Basic data

Standard ID: GB/T 42978-2023 (GB/T42978-2023)
Description (Translated English): Digital cameras - Shading measurements
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: N46
Classification of International Standard: 37.040.10
Word Count Estimation: 18,189
Date of Issue: 2023-09-07
Date of Implementation: 2024-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42978-2023: Digital cameras - Shading measurements

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 37.040.10 CCSN46 National Standards of People's Republic of China Measurement of vignetting in digital cameras Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Preface III 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Test conditions and methods 1 4.1 General 1 4.2 Equipment and Hardware1 4.3 Light source 2 4.4 Test chart 2 4.5 Image/Camera Settings 2 5 Analysis method 3 5.1 Overview 3 5.2 Brightness unevenness 4 5.3 Brightness non-uniformity 4 5.4 Chroma unevenness 4 5.5 Overall color unevenness4 6 Results Report 5 Appendix A (informative) Recommended measurement conditions 6 Appendix B (informative) Example 7 of vignetting metric calculation B.1 Overview 7 B.2 Calculation of unevenness 7 Reference 12

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document has been modified to adopt ISO 17957.2015 "Measurement of Vignette in Photographic Digital Cameras". The technical differences between this document and ISO 17957.2015 and their reasons are as follows. ---Adjust ISO 7589, ISO 11664-2, ISO 11664-4, ISO 12231 and CIE15.2004 that are not specifically cited in the text. to references; ---Adjust the nature of Appendix A from normative to informative. The following editorial changes have been made to this document. ---Change the name of the standard to "Measurement of Vignette in Digital Cameras"; ---Adjusted the formula number. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Photographic Equipment Standardization Technical Committee (SAC/TC107). This document was drafted by. Chengdu Weiguang Collecting Technology Co., Ltd., Hangzhou Photographic Mechanical Research Institute Co., Ltd., Jiaxing Zhongrun Optical Technology Co., Ltd., University of Electronic Science and Technology of China, Hangzhou Guozhao Testing Technology Co., Ltd. The main drafters of this document. Wang Yong, Song Bo, Ge Shiqing, Zhang Jie, Chen Xiaobing, Li Jing, and Zeng Dan. Measurement of vignetting in digital cameras

1 Scope

This document describes a method for measuring vignetting in digital cameras. The test method includes independent measurement of color and luminance signal components. program. This document applies to vignetting measurements on digital cameras and camera phones.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. IEC 61966-2-1.1999 AMD1.2003 Color measurement and management of multimedia systems and equipment Part 2-1.Color tubes agement-Part 2-1.Colourmanagement-DefaultRGB colourspace-sRGB)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Luminance non-uniformityluminancenon-unifority luminanceshading A gradual change in the brightness signal component over the image range. 3.2 Color non-uniformitycolournon-unifority color vignettingcolourshading A gradual change in the components of the chrominance signal over the range of the image.

4 Test conditions and methods

4.1 General When measuring the vignetting of a digital camera, the test conditions in 4.2~4.5 should be used as standard conditions. If it is not possible or approximately achieved The standard operating conditions specified in 4.2~4.5 and the actual operating conditions should be listed together with the reported results. 4.2 Equipment and Hardware The following hardware is required to control and report test conditions. ---Even and flat test card; ---light source; ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 42978-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 42978-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 42978-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 42978-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.