Tianzhu identity recognition method and device based on image pyramid gradient histogram features

Abstract

A dzi bead identification method and device based on image pyramid gradient histogram features. Adopt the portable image acquisition equipment with network function to collect dzi bead image, extract the pyramid gradient histogram feature of dzi bead image rectangular area, the dzi template library based on the pyramid gradient histogram feature establishment of dzi bead image, calculate described extracted dzi bead The Chamfer distance between the pyramid gradient histogram feature in the image rectangular area and the real dzi feature collected and stored in the template library is used for dzi identity authentication. Overcome the challenges of dzi bead identification under different lighting environments, different resolutions and shooting at any angle. In the case of loss of local features of dzi bead images, robust results can still be obtained, which is universal and robust, and can Automatically, efficiently, objectively and accurately identify dzi bead, providing a simple, accurate and intelligent dzi bead identification platform for dzi bead lovers and collectors.

Description

technical field [0001] The invention relates to the field of image matching, in particular to a method and device for identifying the identity of a dzi bead based on the gradient histogram feature of an image pyramid. Background technique [0002] Tianzhu has a unique totem pattern, which has been passed down from origin and is the carrier of culture. The material of Tianzhu is generally jadeite, and jadeite is more common. The shape is generally a cylinder or a quasi-cylindrical with both ends slightly thinner than the middle, as well as a sphere or ellipsoid. Dzi beads generally have special textures. typical dzi beads figure 1 , 2 , 3, where, figure 1 It is a short cylindrical dzi, figure 2 It is an ellipsoid dzi, image 3 It is a long cylindrical dzi. Dzi beads can be made from natural materials or artificially synthesized. Identifying the identity of Tianzhu is of great significance for historical research and regulating the collection market, and the pattern o...

AI Technical Summary

Problems solved by technology

However, the resolutions of different types of mobile phones, that is, different types of image acquisition devices, are very different, and the imaging details also show huge differences, which makes it very difficult to complete image matching; and because most of the beads are not A regular cylinder or sphere, but an irregular body with a special curved surface, the different images obtained from different shooting angles are very different, and in the actual matching, it is necessary to match the Tianzhu images taken at any angle, which further increases the image matching. difficulty

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