Method for identifying left and right palm prints based on directions

Abstract

The invention discloses a method for identifying left and right palm prints based on directions. The method comprises the following steps of: (1) dividing a palm print image into a foreground area block and a background area block of the palm print; (2) performing two-dimensional Fourier transformation on the foreground area block of the image, thereby obtaining a direction theta (x, y) of the foreground area image; (3) calculating a direction histogram g(i) of the foreground area according to the direction theta (x, y) of the foreground area image, and performing one-dimensional mean value smoothing on the direction histogram g(i), thereby obtaining a smoothed histogram; (4) calculating the peak values of all peaks in the smoothed histogram and selecting the direction of the highest peak as the direction of a palm print outside area; and (5) judging left and right palms according to the direction of the palm print outside area, judging as the left palm when the direction is more than 90 degrees and judging as the right palm when the direction is less than 90 degrees. According to the method, the left and right palms are judged by utilizing the palm print direction, the accuracy is very high and can reach 98.92%, the number of the palm print identification is efficiently reduced, the efficiency of the whole identifying process is greatly increased, and the identifying accuracy is also increased.

Description

technical field [0001] The invention relates to palmprint recognition technology, in particular to a direction-based left and right palmprint recognition method. The invention belongs to the technical field of digital image processing and biometric identification. Background technique [0002] As an important biometric technology, palmprint recognition has gradually attracted people's interest recently. In terms of the depth and breadth of research, compared with fingerprint recognition which has a long research history, the research of palmprint recognition can only be said to be in the initial stage. However, due to the excellent characteristics of palmprint itself, palmprint recognition technology has great potential, and people's research on palmprint recognition technology has become more and more in-depth. [0003] For high-resolution palmprints, they have many similarities with fingerprint images, so the technology similar to fingerprint image processing and matchin...

AI Technical Summary

Problems solved by technology

[0003] For high-resolution palmprints, they have many similarities with fingerprint images, so the technology similar to fingerprint image processing and matching is generally used to identify high-resolution palmprints, but because palmprints are much larger than fingerprints area and more feature points, so the recognition speed will be greatly reduced

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