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Method and system for three-dimensional image registration

A 3D image and registration technology, applied in the field of image processing, to achieve the effect of reduced running time and good robustness

Inactive Publication Date: 2012-09-12
SUZHOU INST OF BIOMEDICAL ENG & TECH
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the above problems in the prior art, and provide a three-dimensional image registration method and system to solve the defects in the three-dimensional image registration method in the prior art

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Embodiment Construction

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0046] refer tofigure 1 shown, see figure 1 , which is a flowchart of the three-dimensional image registration method of the present invention. As shown in the figure, the three-dimensional image registration method is used to realize the registration of a reference image and a floating image, and the method includes the following steps:

[0047] A100, loading the reference image and the floating image respectively;

[0048] A200. Divide the reference image and the floating image into a certain number of sub-images, and extract corresponding salient sub-images;

[0049] A300. For the extracted salient sub-image, calculate its feature vector, and perform local registration according to the similarity of the feature vector;

[0050] A400. Using the center of the salient sub-image after local registration as a control point, perform ...

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Abstract

The invention discloses a method and a system for three-dimensional image registration and is used for realizing registration of a reference image and a floating image. The method comprises the following steps: first, loading a reference image and a floating image; second, dividing the reference image and the floating image into a certain number of sub-images and extracting corresponding salient sub-images; third, calculating feature vectors of the extracted salient sub-images and carrying out a local registration according to similarity of feature vectors; and finally, carrying out image registration based on a global transformation model by taking the center of the locally registered salient sub-images as a control point. With the method for three-dimensional image registration provided by the invention, the burden that manual registration and interactive semiautomatic registration place on operators is removed, running time is greatly reduced compared to that of a mutual information-based registration method. In addition, the method has better robustness on gray value difference of images and can complete automatic registration of three-dimensional images fast and accurately.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an automatic three-dimensional image registration technology based on sub-image matching. Background technique [0002] Image registration refers to seeking the spatial one-to-one mapping relationship between two images to be registered, and then can compare images of the same object acquired at different times, images of different parts of the same object, or images of different modalities of the same object Analysis and fusion display have been widely used in the fields of computer vision and image analysis. Among them, the registration of 3D images has become a more difficult and challenging problem due to the larger amount of data processed. Therefore, it is very necessary and important to study the automatic registration method of 3D images. For example, in clinical diagnosis, CT images can display bone structure and tissue density distribution; MR images and ultra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T19/20
Inventor 郑健蒯多杰刘兆邦董月芳
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH
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