Extraction method for mobile terminal palm print region of interest based on complex scene

A region of interest and mobile terminal technology, which is applied in the field of extraction of palmprint regions of interest in mobile terminals, can solve the problems of small illumination influence, inconsistent application requirements of mobile terminals, and inability to meet the needs of palmprint ROI extraction of mobile terminals, etc. Achieve high accuracy and good extraction effect

Active Publication Date: 2017-06-13
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0008] The disadvantage of the second palm segmentation and palmprint ROI method in the above-mentioned prior art is that this method deals with palm pictures taken by a camera under a simple background and a semi-closed state. Consistent, can not meet the needs of palmprint ROI extraction of mobile terminals

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  • Extraction method for mobile terminal palm print region of interest based on complex scene

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Embodiment Construction

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0043]Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understood...

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Abstract

The invention provides an extraction method for a mobile terminal palm print region of interest based on a complex scene. According to the method, taking a palm print image photographed by a camera of a mobile terminal as a to-be-identified image and obtaining a Cr channel component in a YCbCr image in the to-be-identified image; carrying out palm segmentation on the Cr channel component through utilization of an OTSU threshold method, thereby obtaining a binarized image; carrying out palm outline extraction on the binarized image through utilization of a Suzuki edge tracking method, thereby obtaining a palm outline image; and searching a convex hull formed by naturally stretching fingers in the palm outline image through a Sklansky convex hull search method and extracting a region of interest in the to-be-identified image through utilization of the convex hull. According to the method, dynamic thresholding is carried out by selecting the Cr channel component, and the influence of illumination on image segmentation is removed. The complete palm outline image can be extracted through the Suzuki method. The palm image segmentation can be effectively finished through utilization of the Sklansky convex hull search method and the region of interest is extracted. The extraction effect of the palm print region of interest is good and the accuracy is high.

Description

technical field [0001] The invention relates to the technical field of biometric feature recognition, in particular to a complex-scene-based method for extracting a region of interest in a palmprint of a mobile terminal. Background technique [0002] With the development of information technology and the precision of hardware manufacturing process, people pay more and more attention to the protection of private information. In the past, people used digital passwords, fingerprints, smart cards, etc. to control access and protect private information. At present, biometric identification technology has received widespread attention. Biometric identification technology is stable, unique, and universal, and it is difficult to imitate and crack. Common biometric identification technologies include: face recognition, iris recognition, palmprint recognition, fingerprint recognition, and vein recognition. [0003] With the popularity and intelligence of mobile terminal equipment, th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/32G06K9/34G06K9/46
CPCG06V40/12G06V10/25G06V10/267G06V10/56
Inventor 孙冬梅柴婷婷王升辉晏洋
Owner BEIJING JIAOTONG UNIV
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