The invention belongs to the technical field of
digital image processing, and discloses a dual-Gabor
palm print ROI matching method based on specific expanded eight neighborhoods. The dual-Gabor
palm print ROI matching method comprises inputting an ROI image of a
palm print to be matched and an ROI image of a template palm print, and carting out dual-Gabor filtering; carrying out orientation coding
processing and obtaining coded images; carrying out normalized coding on the variation degree of the coded images, and screening out a point the variation degree of which is highest; carrying out image
pyramid calculation on the two coded images to obtain 1, 1 / 2
scale transformation images; obtaining the offset of a sampling point of the image in each scale, and finding out the position of the sampling point after offset; obtaining a preliminary matching
score by calculating relative positions between the sampling points and the relative positions between the sampling points after offset; calculating the
overlap ratio of the two palm prints which are subjected to variation degree normalized coding, and obtaining a final matching
score by combining with the preliminary matching
score; and judging whether the matching is true by means of a set fixed threshold. The dual-Gabor palm print ROI matching method based on specific expanded eight neighborhoods can carry put palm print image ROI matching accurately.