Super-resolution processing method of face image integrating global feature with local information

A face image and local information technology, applied in the field of image processing, can solve the problems of large noise of face images, dissimilar high-resolution images, etc.

Inactive Publication Date: 2010-01-27
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Baker and Kanade proposed the idea of ​​"Face Fantasy" in the paper Hallucinating faces of the IEEEInternational Conference on Automatic Face and Gesture Recognition (International Conference on Automatic Face and Gesture Recognition). They chose the horizontal and vertical directions of the Gaussian pyramid of the face image Derivative and Laplacian (Laplacian) pyramid, the result is better than Freeman and Hertzmann, but the face image obtained by super-resolution has larger noise in some parts
Liu et al.'s paper "A two-step approach t...

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  • Super-resolution processing method of face image integrating global feature with local information
  • Super-resolution processing method of face image integrating global feature with local information
  • Super-resolution processing method of face image integrating global feature with local information

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[0026] The technical solutions of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following examples are implemented on the premise of the technical solutions of the present invention, and detailed implementation methods and processes are given, but the protection scope of the present invention is not limited to the following examples.

[0027] Such as figure 1 As shown in the flow chart of the method of the present invention, the specific implementation steps of the present embodiment are as follows

[0028]1) Establish a manipulable pyramid database of high-resolution face images

[0029] For each high-resolution face image I H , according to the following formula to calculate its five-layer three-order steerable pyramid SP(I H ):

[0030] SP l ( I H ) = ...

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Abstract

The invention relates to a super-resolution processing method of a face image integrating a global feature with local information, in particular to a method for processing a low-resolution face image by an image pyramid to obtain a high-resolution face image. The method comprises the following steps: (1) establishing a controllable pyramid database of high-resolution face images; (2) solving a global high-resolution image of a low-resolution face image; (3) establishing a high-resolution residual face image database; (4) calculating and inputting global high-resolution images of the low-resolution face image; (5) calculating and inputting high-resolution residual face images of the low-resolution face image; and (6) calculating and inputting the final high-resolution image of the low-resolution face image. The method has the advantages of easy realization, strong robustness, high precision, etc., and can provide real-time reliable feature information for face identification.

Description

technical field [0001] The invention relates to a method for super-resolution processing of a human face image by fusing global features and local information, in particular to a method for processing a low-resolution human face image to obtain a high-resolution human face image by using an image pyramid. It belongs to the field of image processing. Background technique [0002] Human face research has been one of the classic problems in the fields of pattern recognition, computer vision and computer graphics. Since the human face is an extremely complex, multi-dimensional pattern, it is also a typical non-rigid pattern with a very complex physiological structure, and people are familiar with and sensitive to the human face, so the research on the human face is relatively rare. It is difficult to say. The first step in any face processing system is to detect the location of a face in an image. However, face detection from an image is an extremely challenging task due to i...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 刘欢喜吕晓威李雄刘允才
Owner SHANGHAI JIAO TONG UNIV
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