Image-processing-technology-based plane footprint detection and analysis system and method thereof

An image processing and analysis system technology, applied in the field of trace detection of criminal investigation technology, can solve the problems of being unable to judge the deepest area and heavy pressure area of ​​the footprint, obtain the depth information of the footprint, and cannot be used directly, so as to achieve narrow screening The effect of object range

Inactive Publication Date: 2011-09-14
王靖中
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Problems solved by technology

Among them, the three-dimensional footprints collected by the gypsum molding method can only be manually measured and empirically analyzed in the inspection and appraisal. Therefore, there are defects in the footprint inspection and appraisal that are difficult to ensure quantitative and scientific requirements
The method of extracting three-dimensional footprints by laser irradiation can realize the application of digital acquisition and quantitative measurement of on-site three-dimensional footprint information, but it needs professional equipment, such as CCD cameras, stepping motors, and optical projectors (including laser light sources). )Wait
Therefore, many criminal investigation units are lim

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  • Image-processing-technology-based plane footprint detection and analysis system and method thereof
  • Image-processing-technology-based plane footprint detection and analysis system and method thereof
  • Image-processing-technology-based plane footprint detection and analysis system and method thereof

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[0066] The planar footprint detection and analysis system and its method of the present invention will be further described in detail below in conjunction with the accompanying drawings and the embodiments of the present invention.

[0067] The core idea of ​​the present invention is: by setting up 64 center points conversion (CEC64, Center Each Convert64) discrete transformation and the mathematical model of image data processing to source plane footprint image, then to every image data median value (PEDM, Pic Each Data Mid -value) for convolution algorithm processing, and then F1 mathematical image model (MATPIC-F1, F1 Math Pic Model) matrix data extraction algorithm, and finally E1-pixel center point conversion (PIXCC-E1, E1 Pixel Center Convert) algorithm, After the final processing, the target image that can clearly identify the gait characteristics such as the heavy pressure surface, the worn surface, and the landing foot is obtained, that is, the target image that restor...

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Abstract

The invention discloses an image-processing-technology-based plane footprint detection and analysis system and a method thereof. The system comprises an image processing subsystem used for extracting the footprint depth information of a source plane footprint image, and generating a target plane footprint image which carries the depth information. In such a way, by means of a computer system, the depth information in a restored plane footprint image is further analyzed to show a stress pressure, an abrasive surface, foot rising and falling and the like, reflecting the gait feature and the figure feature of a person, of a footprint; and specific indexes, such as the sex, the stature, the posture, the age, the step gait and the like, of a suspect are obtained by combining the footprint left on-site for performing contrastive analysis, and detecting aided with the functions such as butting, splicing, overlapping, gridding, measuring, feature marking and the like; therefore, the aims of reducing a screening object range and determining the identity of the suspect are fulfilled.

Description

technical field [0001] The invention relates to the field of trace detection of criminal investigation technology, in particular to a plane footprint detection and analysis system and method based on image processing technology. Background technique [0002] Footprints are the most traces and clues left at urban crime scenes, and they are also one of the common physical evidence at crime scenes. Although the discovery rate of footprints is high, there is a problem that the utilization rate is low and it is difficult to directly provide help for solving cases. [0003] Existing methods for extracting footprints to assist in solving crimes usually include plaster molding or laser light source irradiation to extract three-dimensional footprints. Among them, the three-dimensional footprints collected by the gypsum modeling method can only be manually measured and empirically analyzed in the inspection and appraisal. The method of extracting three-dimensional footprints by lase...

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Application Information

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IPC IPC(8): G06T7/00
Inventor 王靖中
Owner 王靖中
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