计算机工程与应用2012，Vol.48Issue(8)：207-210,4.DOI:10.3778/j.issn.1002-8331.2012.08.059
基于信息可用性评价的指纹图像质量增强算法
Fingerprint image quality enhancement algorithm based on information availability
摘要
Abstract
It proposes a fingerprint image quality enhancement algorithm based on information availability and spectrum analysis in order to solve the problems which may appear in a fingerprint image, such as the image blurs, the effective area of the image is not enough and the positions of singular points are overdue. It evaluates the information availability of a fingerprint image, and re-captures the failed fingerprint images. It takes Fourier transformation on the qualified image and obtains its average and root-mean-square uncertainty of the frequency, then calculates the ratios of the spectrum energy values of inner ring, outer ring and the ring to the spectrum energy value of total energy after removing the DC components to determine the clarity of fingerprint image. For the fingerprint image which needs to be enhanced, round filter is used to remove high frequency and low frequency interference, directional filter is used to connect broken lines and remove adhesions. Experimental results show that this method can determine the availability of fingerprint images accurately, enhance the fingerprint image quality effectively, and only low-quality fingerprint images are enhanced, so it can improve the speed and accuracy and reliability of the fingerprint recognition effectively.关键词
信息可用性/指纹识别/图像质量评估/频谱分析/指纹增强Key words
information feasibility/ fingerprint identification/ image quality evaluation/spectrum analysis/ fingerprint enhancement分类
信息技术与安全科学引用本文复制引用
郭强,彭小奇,钟云飞,左龙..基于信息可用性评价的指纹图像质量增强算法[J].计算机工程与应用,2012,48(8):207-210,4.基金项目
湖南省自然科学基金(No.10JJ2048) （No.10JJ2048）
湖南省重点学科建设经费资助项目. （）
