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Gait contour extraction method

A technology of contour extraction and extraction method, which is applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve problems affecting the extraction effect of gait contours, and achieve improved clarity, distinguishability, and good localization effects Effect

Inactive Publication Date: 2015-03-25
ANHUI COSWIT INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing gait contour extraction methods limit the same gray level in the image segmented by the evolution curve, and make different image information in different areas, which affects the effect of gait contour extraction

Method used

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Examples

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Embodiment Construction

[0011] The specific embodiment adopts the following technical scheme: its extraction method is: the level set function is expressed in a space-time discrete grid, the SDF function is first constructed, and the initialization is reset to zero with this, and the numerical solution of the partial differential equation is solved, and finally Reinitialize through the signed distance function of the curve, and determine whether the value is stable, if it is, stop the iteration, otherwise repeat the above process.

[0012] The principle of this embodiment is as follows: based on the CV model, a new variational level set model combining image edge and region information is adopted; for the external energy item, the original CV model energy is retained On the basis of the item, the gradient value of the image before and after the segmentation is added to obtain a new model function.

[0013] This specific embodiment has a better localization effect on the image boundary, and combin...

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Abstract

The invention discloses a gait contour extraction method, and relates to the technical field of gait contour extraction. The extraction method includes the steps that a horizontal set function is shown in a space-time discrete grid; an SDF function is firstly constructed; initialization for zero returning is accordingly carried out; a numerical solution of a partial differential equation is solved; reinitialization is carried out through a curvilinear symbol distance function; whether a numerical value is stable or not is judged; if iteration is stopped, the steps are repeatedly executed. The gait contour extraction method has the good localization effect on image boundaries, the image edges and regional information are combined, and the definition and the distinctiveness of the gait contour are improved.

Description

[0001] Technical field: [0002] The invention relates to the technical field of gait contour extraction, in particular to a gait contour extraction method. Background technique: [0003] Computer vision is to use various imaging systems instead of visual organs as input sensitive means, and use computers instead of brains to complete processing and interpretation; the ultimate research goal of computer vision is to enable computers to observe and understand the world through vision like humans, and have the ability to autonomously adapt to the environment. Ability. [0004] Gait feature recognition is different from other biological feature recognition technologies (such as face, iris, fingerprint, etc.), gait is an external and dynamic performance of people, and is closely related to time and space. Compared with recognition technology, gait recognition has significant advantages such as non-contact, non-invasive and difficult to hide, these advantages make it have gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46
CPCG06V40/25
Inventor 陈拥权张羽李梁
Owner ANHUI COSWIT INFORMATION TECH
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