Adaptive guided filtering-based digital vein image enhancement method

A technology for image enhancement and image guidance. It is used in instruments, character and pattern recognition, computer parts and other directions. It can solve problems such as false edges, inability to sharpen prominent edges, and achieve the effect of good edge protection characteristics.

Active Publication Date: 2017-03-29
ANHUI UNIVERSITY
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Problems solved by technology

Guided filtering also has some problems, such as not being able to sharpen prominent edges while reducing noise, and it may also have false edges for areas where the gray value changes drastically

Method used

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  • Adaptive guided filtering-based digital vein image enhancement method
  • Adaptive guided filtering-based digital vein image enhancement method
  • Adaptive guided filtering-based digital vein image enhancement method

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] The first gallery used in the present invention is the gallery (FV) of Tianjin Key Laboratory of Intelligent Signal and Image Processing. The database has 64 finger samples, and each finger has 15 images. The database has undergone accurate ROI (region of interest) For extraction, since the image size is not uniform, normalization processing was performed during the experiment, and the image size was unified to 172pixel*76pixel. The second gallery is a finger vein database (USM) made public abroad. There are 492 finger samples in the database, and each finger has 6 images. The database has undergone precise ROI extraction, and the size of each image is uniformly 300pixel*100pixel. , during the experiment, the image size was normalized to 172pixel*76pixel, which is the same size as the FV gallery image.

[0046] Then, the normalized imag...

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Abstract

The present invention discloses an adaptive guided filtering-based digital vein image enhancement method. Based on the defects of an original guided filter, a novel local adaptive weighted guided filtering method is put forward based on an edge detection operator under a condition that the linear complexity of the guided filter is not changed. The quality of an image enhanced by using the method provided by the invention is better than the quality of an image enhanced by using a guided filtering-based enhancement method in three objective image quality indicators, namely, contrast, sharpness and local structure similarity. As indicated by a recognition experiment, the method of the invention is also advantageous in recognition rate. Thus, the effectiveness of the adaptive guided filtering-based digital vein image enhancement method is fully embodied.

Description

technical field [0001] The invention belongs to the technical field of biological feature identification, and in particular relates to a finger vein image enhancement method based on adaptive guidance filtering. Background technique [0002] With the continuous development of information technology and biomedicine, biometric identification technology is being integrated into our daily life, such as access control, attendance, payment and other fields. Common biometrics include: face, iris, fingerprint, palm print, gait, etc. . As a new infrared biometric identification technology, vein recognition technology has become a frontier research hotspot in the field of biometrics at home and abroad due to its own advantages, and has high research value and application prospects. Currently, vein recognition technologies mainly include hand vein recognition, palm vein recognition, and finger vein recognition. Among them, the features of finger veins are relatively rich, and the pos...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/40
CPCG06V10/30
Inventor 王华彬曹伟石军余锐万秀文陶亮
Owner ANHUI UNIVERSITY
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