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GA/T 787-2021 English PDF

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GA/T 787-2021: Technical specifications for fingerprint and palmprint image data
Status: Valid

GA/T 787: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GA/T 787-2021	English	149	Add to Cart	3 days [Need to translate]	Technical specifications for fingerprint and palmprint image data	Valid	GA/T 787-2021
GA 787-2010	English	159	Add to Cart	3 days [Need to translate]	Technical requirement of data exchange of fingerprint image	Obsolete	GA 787-2010
GA 787-2008	English	159	Add to Cart	3 days [Need to translate]	Technical requirements of converting fingerprint image data	Obsolete	GA 787-2008

PDF similar to GA/T 787-2021

Standard similar to GA/T 787-2021

GA/T 424 GA 1210 GA 1051 GA/T 791 GA/T 790 GA 777.9

Basic data

Standard ID	GA/T 787-2021 (GA/T787-2021)
Description (Translated English)	Technical specifications for fingerprint and palmprint image data
Sector / Industry	Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard	A92
Word Count Estimation	6,683
Issuing agency(ies)	Ministry of Public Security

GA/T 787-2021: Technical specifications for fingerprint and palmprint image data

---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.
Technical specifications for fingerprint and palmprint image data ICS 13.310 CCSA92 People's Republic of China Public Safety Industry Standards Replacing GA 787-2010, GA 789-2008 Fingerprint image data technical specification Published on 2021-10-14 2022-05-01 Implementation Published by the Ministry of Public Security of the People's Republic of China

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 of Standardization Documents" drafted. This document replaces GA 787-2010 "Technical Conditions for Fingerprint Image Data Conversion" and GA 789-2008 "Palmprint Image Data Conversion" technical conditions". Compared with GA 787-2010 and GA 789-2008, the main technical changes are as follows. --- Changed the source of on-site fingerprint image (see 4.2, 4.2 of GA 787-2010 edition); --- Added "plane full palm pattern" (see 5.1); --- Changed the source of the palm print image (see 5.2, 4.2 of GA 789-2008 edition). Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is submitted by the Criminal Investigation Bureau of the Ministry of Public Security. This document is under the jurisdiction of the Criminal Information Sub-Technical Committee (SAC/TC179/SC2) of the National Criminal Technology Standardization Technical Committee. This document is drafted by. Criminal Investigation Bureau of the Ministry of Public Security, Physical Evidence Identification Center of the Ministry of Public Security, Beijing Railway Public Security Bureau, Tianjin Siyue Information System Technology Co., Ltd., Beijing Haixin Kejin High-tech Co., Ltd., Beijing Haixin High-tech Fingerprint Technology Co., Ltd. The main drafters of this document. Wang Zhiqiang, Ran Ran, Liu Huan, Han Ke, Wu Hao, Ouyang Yingchun, Yuan Quan, Xu Chunguang, Wang Gang. The previous versions of this document and its superseded documents are as follows. ---First published in.1997 as GA/T 162.1-1997; ---The first revision in.2003 was GA 425.9-2003; ---The second revision in.2008 was GA 787-2008; ---The third revision in.2010 was GA 787-2010; ---This is the fourth revision, incorporating the content of GA 789-2008 "Technical Conditions for Palmprint Image Data Conversion". Fingerprint image data technical specification

1 Scope

This document specifies the source, size and representation format of palmprint image data. This document is applicable to the palmprint image data of the automatic identification system of the public security organs.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GA/T 773 Terms for Automatic Fingerprint Identification System

3 Terms and Definitions

Terms and definitions defined in GA/T 773 apply to this document.

4 Fingerprint Image Sources

4.1 The source of the fingerprint image is black ink fingerprints or fingerprint images obtained with living body collection instruments, including three-sided fingerprints, flat fingerprints, Flat right four fingers, flat left four fingers and flat left and right thumb fingerprints. 4.2 The source of the on-site fingerprint image is the image extracted by photographic extraction, tape extraction, physical extraction and other methods.

5 Palmprint Image Sources

5.1 The source of the palm print image source is black ink palm print or palm print image obtained with a living body collection instrument, including. planar full palm print, planar palm print and outer palm lines. The plane palm pattern adopts the plane stamping; the outer palm print adopts the 45° plane stamping. 5.2 The source of the palmprint image on site is the image extracted by photographic extraction, tape extraction, physical extraction and other methods.

6 Fingerprint image grayscale data

The gray level of each pixel of the uncompressed palmprint image is quantized into 256 levels, represented by an unsigned 8-bit byte. black The pixel gray value is 0, and the white pixel gray value is 255.

7 Fingerprint Image Resolution

7.1 The resolution unit of palmprint image is dots per inch (abbreviated as dpi). 7.2 The resolution of the palmprint image is 500dpi, and the allowable error is within ±1%.

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