| This article main studies fingerprint automatic diagnosis pretreatment technology some questions. Based on existing theory frame, this article has conducted the thorough research to some key questions, proposed some improvement method.This article first summarizes dactylographic and related knowledge of fingerprint identification, summarizes several automatic fingerprint identifying method through summarizing the binary image matching method of the weighted average method of optical Fourier transform method etc. Several methods Gabor algorithm, based on the core of minutiae features of some existing problems of matching method is analyzed and improvement, and brings forward some police system and the problems to be solved.A key research based on the image misaiming technique. Namely, this paper proposed a living in rolling fingerprint image matching algorithm frame collection. After careful to existing image matching algorithm is analyzed, and found its limitations and find a way to solve the problem, by modifying its coverage, thereby eliminating the success of rolling fingerprint of dislocation, ultimately to reprint the algorithm, the scrolling fingerprint image. Finally, the study on the quality of the fingerprint image enhancement techniques. On some existing image quality enhancement technology content and characteristics were studied, especially after the discussion of the equalization and direction of image filtering method is analyzed and in-depth study with police system needs into consideration, the author puts forward his own after improvement methods, improve the filtering and enhancement method, which is used to enhance the filtering method for the second direction. At the same time, puts forward the related parameters filter operator adaptive adjustment method, in order to improve the effect of filter. Through experiment, this method is effectively improved the availability and rolling fingerprint acquisition has certain practical significance. |
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