Multi- resolution non-rigid head medicine image registration method based on image edge

Abstract

The invention relates to a multi-resolution non-rigid head medical image registration method on the basis of image edges, which pertains to the field of information fusion. The method utilizes searches gradually becoming accurate to transform parameters during the registration process. At first, wavelet transformation is used for detecting the edge of an image; a edge pyramid image is formed on the basis of an edge image; then relatively wide search is carried out in the lowest scale level (the roughest level) of the edge pyramid image; the best transformation for registering the two images is found; each subsequent level takes the search result of the former level as a center; and search scope is reduced to continually search until the search in the highest scale level is carried out. Compared with the registration directly using the original image, the method can reduce calculated amount, improve accuracy and can register images of different spatial resolution.

Description

technical field [0001] The invention relates to a head medical image registration method based on wavelet transform, which is a multi-resolution image registration method in the field of information fusion and can be widely used in telemedicine systems, medical image processing and other systems. Background technique [0002] Image registration is a very important technology in image analysis. It mainly seeks a certain transformation to make the corresponding points of the two images reach the same spatial position. Physical mechanisms, differences in patient positioning, changes in imaging parameters, and differences in spatial resolution between different imaging devices, etc., so relying solely on doctors to manually align two or two sets of images of different modes in space is subject to many limitations , and often has greater subjectivity, its reliability is often not high, and errors will inevitably occur. Especially in application fields such as directional radios...

AI Technical Summary

Problems solved by technology

[0002] Image registration is a very important technology in image analysis, mainly by looking for some kind of transformation to make the corresponding points of the two images reach the same spatial position, In the process of medical diagnosis, due to practical problems such as the physical mechanism of different modes of images showing different properties, differences in patient positioning, changes in imaging parameters, and different spatial resolutions between different imaging devices, the two or The spatial alignment of two sets of images of different modes is subject to many limitations, and often has a large degree of subjectivity, its reliability is often not high, and errors will inevitably occur

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