Personnel trace extraction method

An extraction method and trace technology, which is applied in the field of personnel trace extraction, can solve problems such as weakening, insurmountability, and slow speed, and achieve the effects of reducing lighting requirements, reducing hardware costs, and reducing production costs

Active Publication Date: 2015-07-22
杭州创恒电子技术开发有限公司
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Problems solved by technology

[0005] However, for the above-mentioned personnel trace extraction scheme, it is still difficult to overcome the following shortcomings:
[0006] 1. The personnel trace texture extraction scheme has high requirements on lighting. Due to the feature requirement for the background to be weakened to the greatest extent, the requirements on lighting are greatly improved, especially the linear cracks on some floors are difficult to avoid, which leads to the use of this scheme to extract Increased difficulty, easy to extract too rough
[0007] 2. The speed is slow, the real-time performance is not strong, and the image processing algorithm is re

Method used

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Embodiment

[0037] Example: such as figure 1 with figure 2 A method for extracting human traces is shown, which mainly consists of several steps such as image acquisition, image registration, establishment of regions of interest, threshold difference images, and ecological processing. Specifically as figure 1 As shown, as follows:

[0038] 1. Image acquisition:

[0039] The present invention adopts two 5 million image collectors, which are located at different angles of view and under different directions of light, and the two 5 million image collectors both use high-definition wide-angle auto-focus lenses, and the image acquisition process is simultaneously photographed and collected. Two frames of graphics are obtained, which are respectively defined as image 1 and image 2, which are multi-view images.

[0040] 2. Image registration:

[0041] The image registration adopts the image registration method based on feature points, and uses the image local invariant feature extraction m...

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Abstract

The invention relates to a method for personnel trace extraction by utilizing image collecting and processing technology. The method mainly includes the steps of image collection, image registration, interested area creating, differential signal thresholding and ecological processing, wherein positioning detection and description of feature points are realized by utilizing a graphic local invariant feature extracting method during image registration; an interested area is created by utilizing a gradient field and a direction field of an integral image to determine trace texture and background image and then utilizing gray level; differential image thresholding refers to solving a maximum threshold value of the interested area through an OSTU algorithm and binarizing according to the maximum threshold value; ecological processing is performed finally. By the personnel trace extraction method, operation quantity can be reduced, and extraction accuracy can be improved; the personnel trace extraction method is suitable for various personnel traces, thereby being high in applicability.

Description

technical field [0001] The invention relates to an extraction method for extracting personnel traces by using image acquisition and processing technology. Background technique [0002] Personnel traces mainly refer to shoe sole trace patterns, barefoot trace patterns, fingerprints, and palm prints. They are image traces formed by people standing and walking in contact with the ground or other bearing surfaces. Patterns have also become an important physical evidence often used in criminal case investigations. [0003] At present, with the development of relevant research topics in my country's personnel trace extraction project, especially the extraction of trace texture images, colleagues engaged in trace inspection technology across the country have done a lot of summarization and research work. my country's trace inspection technology has initially formed its own system from basic theory to inspection methods. Whether it is the test object, test content, test method and...

Claims

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Application Information

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IPC IPC(8): G06K9/46
Inventor 王亮
Owner 杭州创恒电子技术开发有限公司
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