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Method and device for positioning key feature point

A key feature and feature point technology, applied in the field of key feature point positioning, can solve problems such as the location of key points is not very accurate, the stability and reliability of feature point positioning is not high, and the influence of illumination is sensitive.

Inactive Publication Date: 2010-11-03
VIMICRO CORP
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to extract the key feature points on the face, the early methods include the method based on the geometric features of the face and the method based on Adaboost. These methods are mainly based on the distribution of a single key feature point when matching key feature points. , it is prone to positioning deviation, so it is often only possible to find approximate key point positions, and the final selected key point positions are not very accurate—for example, the eyeball point can be positioned to the eyebrow, and the corner of the eye point may be positioned to the eyeball point, etc.; at the same time, all The robustness of the above method is poor, and it is sensitive to the influence of light; therefore, the stability and reliability of feature point positioning are not high; in addition, there is a method based on elastic template, which has a better positioning effect. However, due to the complexity of the algorithm, the processing time required to determine the final key feature points is usually longer, so the algorithm can only be used when the real-time requirements are not high, and the application range is relatively limited.

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  • Method and device for positioning key feature point
  • Method and device for positioning key feature point

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Embodiment Construction

[0065] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0066] Embodiments of the present invention firstly provide a method for locating key feature points. The method is divided into four steps: face detection, face area edge extraction, candidate feature point extraction, and feature point matching. The specific process is as follows: figure 1 shown, including:

[0067] Step 101: Perform face detection on the target image, and determine the face area in the target image as the image to be aligned;

[0068] Wherein, in this step, the target image is the input image that needs to locate key feature points, and the face detection of the target image is the process of detecting the target image and judging whether the image contains a human face area , various face detection methods in the prior art can be u...

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Abstract

The invention discloses a method for positioning a key feature point, which comprises the following steps: detecting a face in a target image and determining the face area in the target image as an image to be aligned; extracting the edge information in the image to be aligned to obtain an edge graph of the image to be aligned; detecting all candidate feature points from the edge graph according to a pre-set feature point selecting standard; and selecting a plurality of candidate feature points with the highest match degree with a set reference feature point from the candidate feature points to serve as the finally obtained key feature points. The invention further discloses a device for positioning the key feature point, which comprises an image to be aligned determining module, an edge graph acquiring module, a candidate point determining module and a key feature point determining module. The method and device of the embodiment of the invention can accurately position the key feature point in the face area, and the algorithm of the scheme has the advantages of simplicity, small calculation amount and fast implementation.

Description

technical field [0001] The invention relates to image recognition and processing technology, in particular to a method and device for locating key feature points. Background technique [0002] With the rapid development of current computer technology, computer processing capabilities have been greatly improved; at the same time, related technologies in the fields of pattern recognition and computer vision have also achieved rapid development. Face detection is a hot spot in research and application in related fields. , has important practical value and has been widely used in many fields such as security, entertainment, and human-computer interaction. [0003] Face detection refers to the use of face detection, facial feature point positioning and other technologies to obtain the face position information in the image, and based on the face position information, a certain algorithm is used to extract the information contained in the face image. method. At present, with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/46G06K9/62
Inventor 王俊艳
Owner VIMICRO CORP
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