GB/T 42650-2023 English PDF

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GB/T 42650-2023: Space data and information transfer systems - Lossless and near-lossless multispectral and hyperspectral image compression
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42650-2023	1159	Add to Cart	7 days	Space data and information transfer systems - Lossless and near-lossless multispectral and hyperspectral image compression	Valid

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Basic data

Standard ID: GB/T 42650-2023 (GB/T42650-2023)
Description (Translated English): Space data and information transfer systems - Lossless and near-lossless multispectral and hyperspectral image compression
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: V75
Classification of International Standard: 49.140
Word Count Estimation: 57,526
Date of Issue: 2023-05-23
Date of Implementation: 2023-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42650-2023: Space data and information transfer systems - Lossless and near-lossless multispectral and hyperspectral image compression

---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 49:140 CCSV75 National Standards of People's Republic of China Space Data and Information Transmission System Lossless and near-lossless compression of multispectral and hyperspectral images Released on 2023-05-23 2023-09-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Symbols and abbreviations1 4:1 Symbol 1 4:2 Abbreviations 3 5 General 3 5:1 Composition and principle of compression system 3 5:2 Compression mode 3 6 image representation 4 6:1 Overview 4 6:2 Dimension 4 6:3 Dynamic range 4 6:4 Sample coordinate index 4 7 Predictor 4 7:1 General 4 7:2 Predicting the number of spectral segments 6 7:3 Full prediction mode and simplified prediction mode 6 7:4 Local and 6 7:5 Local differences 7 7:6 Weighting8 7:7 Predictive Computing 9 7:8 Quantization 10 7:9 Sample representative value 11 7:10 Weighted value update 11 7:11 Mapped Quantization Index 12 8 encoder 12 8:1 Overview 12 8:2 Compressed image data structure 13 8:3 Frame header 13 8:4 Compressed code stream 24 Appendix A (Informative) Partial Symbol Calculation Instructions 31 Appendix B (Informative) Low Entropy Coding Table 32

foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting: This document refers to "ISO 18381:2013 "Lossless compression of multispectral and hyperspectral images in spatial data and information transmission systems"" Grass, the degree of consistency is non-equivalent: Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying these patents: This document is proposed and managed by the National Aerospace Technology and Its Application Standardization Technical Committee (SAC/TC425): This document is drafted by: Xi'an Institute of Space Radio Technology, China Aerospace Standardization Institute, Xidian University, 21 Century Space Technology Application Co:, Ltd:, Ningde Standardization Science and Technology Research Institute, Beijing Remote Sensing Equipment Research Institute, China Resources Satellite Application Center, Beijing Institute of Electronic Engineering, Qingdao Guoce Haiyao Information Technology Co:, Ltd: The main drafters of this document: Hou Shuwei, Zhang Jianhua, Zhou Yuxia, Li Li, Shao Yingzhao, Zheng Xiaosong, Xing Mengdao, Yuan Suchun, Li Xiaobo, Fang Huoneng, Wang Qi, Xu Dongyan, Ding Yueli, Wang Yuanle, Zhang Shoujuan, Gou Baowei, Li Hongjuan, Chen Ting, Su Dongwei, Wang Haibo, Lin Ying, Ke Tenglun, Wei Yufei, Han Zhen: Space Data and Information Transmission System Lossless and near-lossless compression of multispectral and hyperspectral images

1 Scope

This document specifies the lossless and near-lossless compression methods for multispectral and hyperspectral images in spatial data and information transmission systems, specifically including compression General principles of compression, image representation, predictors, encoders, and more: This document is applicable to the design and application of lossless and near-lossless compression of spacecraft multispectral and hyperspectral images:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date applies to this document: For undated reference documents, the latest version (including all amendments) applies to this document: GB/T 42041 Terminology for Space Data and Information Transmission in Aerospace

3 Terms and Definitions

The terms and definitions defined in GB/T 42041 apply to this document:

4 Symbols and abbreviations

4:1 Symbols The following symbols apply to this document: A*---absolute error limit constant; az---absolute error limit value; B--- output word size, in bytes, should be an integer from 1 to 8; Cz --- the number of local differences used for prediction in the spectral segment z; D---The dynamic range of the image, represented by the number of bits; DA---absolute error limit bit depth; DR---relative error limit bit depth; dz,y,x,dz(t)---central local difference; dNz,y,x,dWz,y,x,dNWz,y,x,dNz(t),dWz(t),dNWz(t)---direction local difference; Fy --- image frame; J --- block size; K---initial constant of accumulator; k'z, k″z---initial parameter of accumulator; Li --- low entropy coding input symbol limit; lz(t) --- low entropy encoding input symbols; ......

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