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Non-illumination face image reconstruction method and system

A face image and image technology, applied in the field of unilluminated face image reconstruction method and system, can solve the problems of reduced face recognition accuracy, low correction accuracy, uneven light spots or dark spots, etc.

Active Publication Date: 2012-02-15
HANVON CORP
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Problems solved by technology

However, the texture information of the face illumination template image obtained in the difference process is less, and the accuracy of the correction is lower. Accuracy of face recognition

Method used

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  • Non-illumination face image reconstruction method and system
  • Non-illumination face image reconstruction method and system
  • Non-illumination face image reconstruction method and system

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Embodiment Construction

[0026] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0027] figure 1 This is a flowchart of Embodiment 1 of the method for reconstructing an unilluminated face image according to the present invention. like figure 1 As shown, the method for reconstructing an unilluminated face image in this embodiment includes:

[0028] S101. Perform brightness adjustment on the original face image to be recognized.

[0029] In an environment with poor lighting conditions, since some areas of the original face image to be identified appear as bright spots or dark spots, it is easy to add errors to the reconstruction. Therefore, before acquiring the face reflection image, the original face image to be identified is processed Dimming. Brightness adjustment can be performed by stretching the image histogram corresponding to the original face image to be recognized.

[0030] S102: Obtai...

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Abstract

The invention discloses a non-illumination face image reconstruction method and a non-illumination face image reconstruction system, which belong to the field of image reconstruction. The method comprises the following steps of: acquiring a face reflectivity image from a to-be-recognized original face image; establishing an illumination subspace according to a face reference image under differentillumination conditions and projecting the to-be-recognized original face image and the face reflectivity image to the illumination subspace to obtain corresponding reference images respectively; establishing corresponding texture subspaces according to the corresponding reference images and projecting the to-be-recognized original face image and the face reflectivity image to the corresponding texture subspaces to obtain a projection coefficient of a base image in an original texture subspace and a base image in the reflectivity texture subspace respectively; and reconstructing a non-illumination face image according to the projection coefficient of the base image in the original texture subspace and the base image in the reflectivity texture subspace. The method and the system are mainly used for non-illumination face image reconstruction.

Description

technical field [0001] The invention belongs to the field of image reconstruction, and in particular relates to a method and system for reconstructing a face image without illumination with strong illumination adaptability. Background technique [0002] Due to its non-contact, intuitive and friendly technical advantages, biometric-based face recognition technology has been widely used in security, financial security, attendance and other fields. [0003] The process of face recognition is roughly as follows: capture the original face image to be recognized, then perform face detection and face feature extraction, and compare the extracted face features with those in the reference image to complete the entire process. The process of face recognition. Under the two-dimensional image representation, the original face image to be recognized is represented as the superposition of the face illumination template image and the face reflectance image. The face illumination template...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/00G06T7/00
Inventor 熊鹏飞黄磊刘昌平
Owner HANVON CORP
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