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Face registering method and device

A registration and target face technology, applied in the field of image processing, can solve the problems of wrong local extreme points, optimization, etc., and achieve the effect of accurate registration results

Inactive Publication Date: 2016-10-12
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In view of this, the present invention provides a method and device for face registration, which is used to solve the problem of optimizing to the wrong local extremum when optimizing the minimum error in the prior art scheme of using affine transformation for face registration The problem on the point, its technical solution is as follows:

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] An embodiment of the present invention provides a face registration method. The method performs face registration based on a layered grid model, wherein the layered grid model includes a preset low-resolution grid template and a high-resolution grid template. grid template, see figure 1 , which shows a schematic flow chart of the face registration method, which may include:

[0044] Step S101: Register the target face image using the low-resolution gri...

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Abstract

The invention provides a face registering method and device. A low-resolution grid template and a high-resolution grid template are set in advance; the low-resolution grid template is used to register an object face image, and a low-resolution registering result is obtained; a high-resolution registering reference value is determined via the low-resolution registering result and a grid conversion matrix, and the conversion matrix realizes conversion between the low-resolution grid template and the high-resolution grid template; and on the basis o the high-resolution registering reference value, the high-resolution grid template is used to register the object face image, and a final registering result is obtained. The low-resolution grid template is used to find an approximate area of the registering position, so that when the high-resolution grid template is used for registering, other local extreme points are not optimized, calculation results far from the reference value can be eliminated on the basis of the reference value, and an accurate registering result is obtained finally.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a face registration method and device. Background technique [0002] Face registration is a research hotspot in the field of computer vision and image perception. As an important step in face image analysis, it provides a strong guarantee for subsequent face recognition, pose estimation, expression analysis, and face animation. [0003] The essence of the face registration method is to find the corresponding relationship between the face model and the reference model. Face registration methods in the prior art mainly include two types, the first is similarity transformation, and the second is affine transformation. Among them, the similarity transformation can ensure that the shape ratio of the face does not change, and it only performs transformations on the four degrees of freedom of scaling, rotation angle, displacement in the horizontal direction, and displa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
CPCG06V40/16G06F18/22
Inventor 孔令胜刘小沣刁志辉闫俊良贾平
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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