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A method and device for extracting lbp features based on facial key points

A feature extraction, key point technology, applied in computer parts, character and pattern recognition, instruments, etc., can solve problems such as LBP feature differences

Active Publication Date: 2019-08-09
HISENSE
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a face feature extraction method and device based on LBP, which aims to solve the problem that the extracted LBP features of the same key point of the face are quite different under different face postures of the same person, thereby improving face recognition. Accuracy

Method used

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  • A method and device for extracting lbp features based on facial key points
  • A method and device for extracting lbp features based on facial key points
  • A method and device for extracting lbp features based on facial key points

Examples

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Embodiment 1

[0087] image 3 It shows a schematic flow chart of LBP feature extraction based on facial key points provided by the embodiment of the present invention, as image 3 As shown, the LBP feature extraction process based on facial key points includes:

[0088] Step 100: Estimating the face pose of the face image based on the key points of the face image to be processed.

[0089] Specifically, in the process of executing step 100, firstly, the face image to be processed is preprocessed to obtain a grayscale image of the image to be processed, and the facial key point detection is performed on the grayscale image of the image to be processed to obtain the The position of the facial key points to be extracted LBP features in the grayscale image. It should be noted that the face key points determined in step 100 include face contour key points, eyebrow key points, eye key points, nose key points and mouth key points, which respectively represent the face contour in the face image to...

Embodiment 2

[0148] Figure 11 It shows another schematic flow chart of LBP feature extraction based on facial key points provided by the embodiment of the present invention, as Figure 11 As shown, the LBP feature extraction process based on facial key points includes:

[0149] Step 200: Estimating the face pose of the face image based on the key points of the face image to be processed.

[0150] Specifically, the execution process of step 200 is the same as that of step 100 in the above-mentioned embodiment 1, which has been introduced in detail above, and the present invention will not be repeated here. For details, please refer to step 100 in embodiment 1.

[0151] Step 210: Determine the radius of the ellipse neighborhood corresponding to the key point in the preset mapping table according to the face pose of the face image.

[0152] Specifically, according to the face pose of the face image to be processed determined in the above step 200, the ellipse neighborhood radius correspond...

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Abstract

The invention discloses a method and device for extracting LBP features based on facial key points. The invention relates to the technical field of image processing and pattern recognition, and aims to solve the problem of extracting the same key point of the face under the same person and different face poses. The problem of large differences in LBP features can improve the accuracy of face recognition. This method determines the face pose of the face image according to the key points of the face image, and then corrects the ellipse neighborhood radius corresponding to different face key points according to the face pose of the face image, and establishes the relationship between the ellipse neighborhood radius and The corresponding relationship between the face poses of the face image avoids the problem that the local zoom ratio of the face image is different under different face poses of the same person, resulting in a large difference in the LBP features extracted from the same key point, and improves the accuracy of different face images. The effectiveness of LBP feature extraction based on facial key points under face pose, thereby improving the accuracy of face recognition.

Description

technical field [0001] The invention relates to the technical fields of image processing and pattern recognition, in particular to a method and device for extracting LBP features based on facial key points. Background technique [0002] Face recognition technology is to identify the identity by analyzing the displacement shape and positional relationship of facial organs. It is an important biometric technology and is widely used in security, access control, monitoring and other fields. The main algorithms of face recognition technology include face recognition methods based on template matching based on geometric features, face recognition methods based on geometric features, face recognition methods based on sample learning, and face recognition methods based on texture features. Among them, the face recognition method based on facial texture features mainly relies on LBP (Local Binary Pattern), that is, local binary pattern for facial feature extraction. [0003] The fac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06V40/168
Inventor 冯谨强高伟杰
Owner HISENSE
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