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Extraction of Fingerprint Pore Feratures Based on Wavelet Image Enhancement

Author: FengMeiXian
Tutor: ChenWen；NiYiChun
School: Shanghai Jiaotong University
Course: Electronics and Communication Engineering
Keywords: Automated Fingerprint Identification System Fingerprint Wavelet Transform Sweat glands Ridge
CLC: TP391.41
Type: Master's thesis
Year: 2008
Downloads: 140
Quote: 1
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Abstract


The fingerprint is unique and invariance , which makes fingerprint identification become more and more widely in recent years in various fields such as security, justice as a means of identification . Generally, the fingerprint feature contains the layer 3 information , the first layer, i.e., the fingerprint patterns , describes the general characteristics of the fingerprint , the second layer for local features, such as the bifurcation point of the ridge line and junction , the third layer is the morphological characteristics , including the various spatial attribute information of the ridge line . Layer 3 information to the third layer of information is the most accurate . However, due to the limited resolution of the fingerprint image acquired , the existing fingerprint feature extraction is mainly concentrated on the front two layers of information , which makes many of the details of the fingerprint information is ignored . The need to enhance the fingerprint image in the existing resolution image in order to extract the third layer information . Wavelet multi-resolution analysis and the ability of local time and frequency domain analysis . In this paper, wavelet features in the wavelet domain fingerprint image enhancement. Before wavelet transform of the fingerprint image , the image of the more common standard processes , different images of the same mean and variance , to facilitate the matching of fingerprint . Then proposed an improved soft thresholding wavelet domain algorithm for image enhancement . Finally, using the improved minimum error square algorithm enhanced fingerprint image processing . Extraction third layer Hankong information obtained extraction result can be a good expression of the fingerprint information.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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