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Human face contour extracting method

An extraction method and contour technology, which is applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve problems such as easy to fall into local optimal solutions, and achieve the effect of reducing difficulty and high accuracy

Active Publication Date: 2013-03-13
SHANDONG SYNTHESIS ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the initial position of the model is directly related to the accuracy of the results, and it is easy to fall into a local optimal solution

Method used

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Embodiment Construction

[0026] The embodiment according to the present invention is described as follows, and for a clearer expression, it is described in a tree structure:

[0027] 1. Standardize the size of the image to be processed; to reduce the difficulty of subsequent processing, especially the processing involving related calculations; Note: The semicolons in the subsequent content are instructions for corresponding steps.

[0028] 1.1. According to 1, zoom, rotate, translate, and cut the picture so that the size of the picture is unified to 240×320, the distance between the two pupils is 64 pixels, and the average center point coordinates of the two pupils are (120,160); in this technical condition Under this condition, a relatively clear facial contour can be obtained, and the amount of calculation is not large.

[0029] 2. Image grayscale: if the image is determined to be non-grayscale, the image will be grayscaled.

[0030] 2.1. According to 2, the formula Y = R×0.299 + G×0.587 + B×0.114 ...

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Abstract

The invention discloses a human face contour extracting method, wherein the difficulty of subsequent treatment is reduced by standardizing the size of an image to be treated; and the influence of illumination on human face extraction is reduced according to the human face natural quality of three parts and five holes and with dependence on the average contours of human faces. Therefore, the human face contour is fitted through the intersection point of a ray passing through the nasal tip with the human face contour and then by finding out a demarcation point; and the accuracy is higher.

Description

technical field [0001] The invention relates to a method for extracting human face contour. Background technique [0002] Face contour extraction is the basis of face feature recognition and head 3D model reconstruction. In most applications, face recognition, especially face recognition, is based on the front face contour. More specifically, the face contour extracted in this paper refers to the outer contour line from the ears to the chin, which can be used to recognize the face shape and is an important feature basis for face recognition. [0003] The extraction method of the face contour usually adopts several methods: [0004] Method 1. Use the edge detection algorithm of the Canny operator. This method uses a global threshold to binarize the image, and then extracts the contour of the face. When the input original image is unevenly illuminated, the brightness of each pixel on the image varies greatly, and the global threshold is obviously difficult to perform edge d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46
Inventor 曹杰许野平方亮刘辰飞张传峰
Owner SHANDONG SYNTHESIS ELECTRONICS TECH
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