A fast local image reconstruction method based on algebraic iteration
An iterative method and reference image technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of slow convergence speed, poor imaging performance, low image resolution, etc., and achieve the reduction of calculation scale and fast image reconstruction Effect
Pending Publication Date: 2019-02-26
SHANDONG UNIV OF TECH
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Problems solved by technology
The back projection algorithm is widely used, the imaging speed is fast, and it can be detected in real time, but the imaging performance is poor and the image resolution is low
The iterative algorithm has good imaging effect and high image resolution, but the iterative algorithm gradually obtains the reconstructed image result through the iterative method, and the convergence speed of different iterative algorithms is different, and some of the iterative algorithms converge very slowly, resulting in the imaging speed not reaching Practical application requirements
Especially in the online real-time detection process, the iterative algorithm cannot meet the application requirements of fast detection
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[0016] In order to make the purpose and technical solutions of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. Based on the described embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood...
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The invention relates to the field of image reconstruction, in particular to an image fast local reconstruction method based on an algebraic iterative method. By introducing the reference image and using the projection difference between the image to be reconstructed and the reference image as the projection data, the invention determines the region to be reconstructed, significantly reduces the region to be reconstructed and greatly reduces the scale of the weight influence coefficient matrix, thereby greatly reducing the calculation scale and achieving the purpose of fast image reconstruction.
Description
technical field [0001] The invention relates to the field of image reconstruction, in particular to an image fast local reconstruction method based on an algebraic iteration method. . Background technique [0002] At present, image reconstruction technology is widely used in many fields such as medicine and aerospace. Image reconstruction algorithms mainly include back-projection algorithm and iterative algorithm. The back-projection algorithm is widely used, the imaging speed is fast, and it can be detected in real time, but the imaging performance is poor and the image resolution is low. The iterative algorithm has good imaging effect and high image resolution, but the iterative algorithm gradually obtains the reconstructed image result through the iterative method, and the convergence speed of different iterative algorithms is different, and some of the iterative algorithms converge very slowly, resulting in the imaging speed not reaching practical application requirem...
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IPC IPC(8): G06T5/50
CPCG06T5/50
Inventor 常征
Owner SHANDONG UNIV OF TECH