MATLAB使用二次多项式实现图像相对配准
时间: 2023-07-11 14:24:08 浏览: 275
MATLAB中可以使用二次多项式函数fitgeotrans来实现图像的相对配准。具体步骤如下:
1.加载需要配准的图像
2.使用imregister函数进行初步配准,得到一个仿射变换矩阵T
3.使用cpselect函数手动选择一些匹配点对,得到两组匹配点的坐标矩阵fixedPoints和movingPoints
4.使用fitgeotrans函数,将匹配点对的坐标作为输入参数,得到一个二次多项式变换矩阵Tpoly
5.使用imwarp函数,将需要配准的图像进行二次多项式变换,得到配准后的图像
下面是MATLAB代码示例:
```matlab
% 加载需要配准的图像
fixed = imread('fixed.jpg');
moving = imread('moving.jpg');
% 初步配准,得到仿射变换矩阵T
[optimizer, metric] = imregconfig('multimodal');
movingRegistered = imregister(moving, fixed, 'affine', optimizer, metric);
T = imregtform(moving, fixed, 'affine', optimizer, metric);
% 选择匹配点对
[fixedPoints, movingPoints] = cpselect(fixed, movingRegistered, 'Wait', true);
% 使用fitgeotrans函数得到二次多项式变换矩阵Tpoly
Tpoly = fitgeotrans(movingPoints, fixedPoints, 'polynomial', 2);
% 利用变换矩阵Tpoly进行图像配准
movingRegisteredPoly = imwarp(moving, Tpoly, 'OutputView', imref2d(size(fixed)));
% 显示结果
figure
imshowpair(fixed, movingRegisteredPoly, 'montage')
title('Fixed Image (left) and Moving Image Registered with Polynomial Transformation (right)')
```
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