Side face detection method and device based on head contour verification

A side face and profile technology, applied in the field of video surveillance, can solve the problems of small head detection range, unstable head tracking, inability to adapt to head detection, etc., and achieve the effect of lowering the technical threshold and simplifying the process
CN105205437BActive Publication Date: 2018-12-07济南宇视智能科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
济南宇视智能科技有限公司
Publication Date
2018-12-07

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Abstract

The present invention provides a side face detecting method and device based on head profile authentication. The method comprises a step of carrying out skin color binary processing on a collected image, carrying out communication component marking on the processed image, and obtaining a plurality of rectangular skin color areas, a step of carrying out hair color binary processing on the areas if the areas satisfy a preset skin color judgment condition, a step of adjusting an interest area according to the areas if the areas satisfy a preset hair color judgment condition, a step of detecting an edge pixel point in the interest area, a step of making a head top profile template according to the interest area, a step of using the template to carry out distribution in the interest area and calculating the edge pixel point quantities in the template in different positions, and a step of taking a quantity maximum value and determining that the rectangular skin color areas have an effective head and side face detection is successful if the maximum value reaches a preset edge pixel value. According to the method and the device, the problem of large angle side face detection is solved, the technical threshold of side face detection is lowered, and the flow of the side face detection is simplified.
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Description

technical field

[0001] The invention relates to the technical field of video surveillance, in particular to a method and device for detecting side faces based on head contour verification. Background technique

[0002] At present, head detection is widely used in digital video processing, video detection, content-based retrieval, etc., and has important application value. Human head detection is a complex and challenging pattern detection. Its main difficulties are in two aspects: on the one hand, it is caused by the different characteristics of the human head. The human head has quite complex detail changes, such as hair color, skin color, glasses and head. On the other hand, due to changes in external conditions, different imaging angles cause multiple postures of the human head, such as front, side, and back, and the characteristics are different, as well as the influence of light, such as the brightness in the image, Contrast changes and shadows etc. These difficulties...

Claims

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