Quick image rectification method in presence of translation and rotation at same time

Abstract

The invention discloses a quick image rectification method in the presence of translation and rotation at the same time. Another image which searches for reference image relationship is called an image to be rectified; a circular template matching method is adopted to determine translation amount; after the radius of the circular template is determined, the central structure of a reference image serves as a reference template; within a certain search range of the image to be rectified, a block of graph in optimum matching with the reference template is searched, and the difference value of the circle center coordinates of the reference template and the block of graph is the translation amount of the image to be rectified relative to the reference image; on the other aspect, the circular reference template and the matching block respectively are subject to logarithm pole coordinate transformation; the corresponding reference template and a matching subblock of the image to be rectified are subject to gray-scale projection to determine the rotation angle of the image to be rectified relative to the reference image; and the image rotates according to the angle to finish the quick rectification of images. The invention realizes the quick image rectification in the presence of translation and rotation at the same time.

Description

technical field [0001] The invention belongs to the technical field of digital image processing, and relates to a fast image registration method under the condition of simultaneous translation and rotation. Background technique [0002] The registration of two images is a key link in the process of image stitching, image super-resolution reconstruction, seal authenticity identification, etc. Only when an image needs to be translated and rotated can it be registered. When performing registration between two images with the same partial content, if the translation amount is not 0, it will affect the determination of the rotation parameter. Similarly, if the rotation parameter is not 0, the translation amount cannot be accurately determined. If the translation is performed first, the existence of the rotation angle will affect the determination of the translation parameters, and if the rotation is performed first, the existence of the translation will affect the determination o...

AI Technical Summary

Problems solved by technology

When registering between two images with the same local content, if the translation amount is not 0, it will affect the determination of the rotation parameter. Similarly, the rotation parameter is not 0, and the translation amount cannot be accurately determined

If you translate first, the existence of the rotation angle will affect the determination of the translation parameters. If you rotate first, the existence of translation will affect the determination of the rotation parameters, which will eventually lead to the failure of registration.

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