Finger and palm print image processing device and method

Abstract

A fingerprint and palmprint image processing device, comprising: a component for reading in a fingerprint or palmprint as an image; dividing the fingerprint or palmprint image into partial areas, and extracting a plurality of representations in each partial area A part of the raised line candidate image of raised lines; a candidate image with a high probability of being a raised line is determined from the extracted raised line candidate images, and a partial area including the raised line is determined as a high-reliability area. Parts; with respect to the local area other than the high-reliability area, a part estimated to be a raised line image representing raised lines is selected from the raised line candidate images extracted by the extraction means; A raised line image is used as a part indicating whether the image of the raised line is valid; according to the raised line image in the high reliability area, in the raised line image selected by the selection part, the The judging means judges a valid raised line image to generate an overall image.

Description

technical field [0001] The present invention relates to a finger-palmprint image processing device and method, and its program for fingerprint checking, fingerprint classification or palmprint checking. Background technique [0002] In the past, as the method for automatically extracting raised line information such as raised line direction and raised line spacing from the finger and palm print image, for example, the method for smoothing the raised line direction pattern disclosed in Patent No. 2765335 and its Classification of fingerprint patterns based on the relaxation method presented at the 22nd (early Showa 56) national meeting of the Society for Device and Information Processing (Kawagoe et al.). The convex line direction graph smoothing method and its device are based on the principle of energy minimization, and the evaluation function is set by a scale called reliability in the direction extracted from each two-dimensional local area set on the image , and perform...

AI Technical Summary

Problems solved by technology

[0009] In the finger and palm print image processing device of the above-mentioned Japanese Patent Laid-Open No. 9-167230, although the raised lines can be extracted without being affected by wrinkles, because the continuity of adjacent regions is emphasized, the Determine the raised line image in , so in Figure 13 The core shape shown in (a), Figure 13 In the portion where the convex line has a large curvature such as the triangle shown in (b), even if the convex line is clear, an image candidate derived from a wrinkle or the like that is more continuous than the convex line may be selected, resulting in convexity. Failed to pull out the starting thread

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