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Technical specification of digital image authenticity indentification--Image resampling detection
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Basic data
| Standard ID | GA/T 917-2010 (GA/T917-2010) |
| Description (Translated English) | Technical specification of digital image authenticity indentification--Image resampling detection |
| Sector / Industry | Public Security (Police) Industry Standard (Recommended) |
| Classification of Chinese Standard | A92 |
| Classification of International Standard | 13.310 |
| Word Count Estimation | 4,432 |
| Date of Issue | 2010-12-02 |
| Date of Implementation | 2010-12-02 |
| Quoted Standard | GA/T 592-2006 |
| Regulation (derived from) | Industry Standard Record Announcement No |
| Issuing agency(ies) | Ministry of Public Security |
| Summary | This standard specifies the basic requirements for the detection of image resampling characteristics in image authenticity authentication techniques. This standard applies to China judicial organs in criminal, civil, judicial activities and state administrative organs in the administrative law enforcement and the handling of incidents and other activities in the image resampling detection. |
GA/T 917-2010: Technical specification of digital image authenticity indentification--Image resampling detection
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Technical specification of digital image authenticity indentification - Image resampling detection
ICS 13.310
A92
People's Republic of China Public Security Industry Standards
Image authenticity identification specifications
Image resampling detection
Issued on. 2010-12-02
2010-12-02 implementation
People's Republic of China Ministry of Public Security
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents.
This standard by the National Standardization Technical Committee of Criminal technical inspection camera Technical Committee (SAC/TC179/SC5) and proposed
Centralized.
This standard was drafted. Ministry of Public Security Evidence Identification Center, Institute of Automation.
The main drafters of this standard. Xu Xiaojing, Li Zhihui, Li Zhigang, PENG Si.
Image authenticity identification specifications
Image resampling detection
1 Scope
This standard specifies the basic requirements for image identification technology to detect the authenticity of the image resampling characteristics.
This standard applies to our judiciary in criminal, civil, and judicial activities in the state administration and administrative enforcement event dealing with accidents
And other activities in the image resampling testing.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GA/T 592-2006 Rules of Criminal digital imaging technology
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Image sampling imagesampling
Continuous image signal is converted into digital image coordinate values is called sampling. Each coordinate point is called a sampling point.
3.2
Image resampling imageresampling
To know when the value of the original image is not located on the sampling points, the need for interpolation, a process known as image resampling. Image
Scaling, rotation and other geometric transformation operation will have a re-sampling process. Resampling main feature is the relationship between the values of adjacent pixels, if
There are different areas of the image different resampling process, it may exist between different types of pixel relations.
3.3
Upsampling, downsampling upsampling, downsampling
Resampling the sampling density of the sample is divided into upper and lower sampling. the sample is (also called oversampling) sampling density higher than the original coordinates, sampling
For the next sampling (also known as the down-sampling, sub-sampling) at a density lower than the original coordinates. On the corresponding image to enlarge sampling, down-sampling the corresponding image reduction.
4 Equipment
4.1 image analysis system and inspection
4.1.1 can open at least BMP, TIFF, JPEG three general format digital images, can open a video file of standard AVI format
And convert video to continuous still images.
4.1.2 capable of a resolution of 128dpi × 128dpi image than the standard test set detected resampling characteristics.
4.1.3 can be re-sampled and stored in the form of characteristic performance values or map.
4.1.4 provide resampling feature differences between standard.
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