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Feature-based X-ray image sequence matching algorithm and implementation of automatic stitching

Author: MengXue
Tutor: DengZhenSheng
School: Central South University
Course: Biomedical Engineering
Keywords: X-ray image sequences Biorthogonal wavelet transform Feature matching Automatic splicing
CLC: TP391.41
Type: Master's thesis
Year: 2010
Downloads: 100
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Abstract


In order to solve scoliosis and lower limb deformities and other orthopedic disorders measurement problems , as well as the size of the imaging area is much larger than the size of the X-ray detector contradiction , provides physicians with important references , this paper based on X-ray images , we proposed a kind based on biorthogonal wavelet transform and feature matching X-ray image sequences automatically mosaic method. This article first image stitching algorithm for each step in detail summary and analysis, image registration algorithm is studied and classification ; Then , using biorthogonal wavelet transform multi-resolution image sequences , combined with Canny operator effective extraction of image edge contour edge contour matrix by calculating the value of the matrix H and E and obtain the image feature points ; using the normalized cross-correlation algorithm to achieve coarse matching feature points , and the introduction of a random sample of the same robust algorithm to remove mismatch right, feature points to achieve an exact match ; using improved genetic algorithm for image sequences automatically sort , to achieve the automatic matching system stitching ; using the weighted average image fusion algorithm to achieve a smooth seamless ; then , we design a multi- group there is a big gray image , contrast, rotate, scale differences in X-ray image stitching experiment to test the method on the stability of these differences ; Finally, the paper splicing method is applied orthopedics in clinical X-ray image stitching . Experimental results show that the proposed method of X-ray image stitching can be quickly and accurately achieved without external characteristics of X-ray image sequences automatic panorama stitching, has strong application value.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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