把有重合部分的三张图片拼接起来,消除畸变
时间: 2024-03-20 15:41:05 浏览: 12
将有重合部分的三张图片拼接起来并消除畸变的过程通常称为全景拼接(panorama stitching)。在Matlab中,可以使用Computer Vision Toolbox中的函数来实现全景拼接,以下是一个基本的示例代码:
```matlab
%读取三张图像
im1 = imread('image1.jpg');
im2 = imread('image2.jpg');
im3 = imread('image3.jpg');
%提取图像的特征点
pts1 = detectSURFFeatures(rgb2gray(im1));
pts2 = detectSURFFeatures(rgb2gray(im2));
pts3 = detectSURFFeatures(rgb2gray(im3));
%提取特征点的描述符
[features1, validPts1] = extractFeatures(rgb2gray(im1), pts1);
[features2, validPts2] = extractFeatures(rgb2gray(im2), pts2);
[features3, validPts3] = extractFeatures(rgb2gray(im3), pts3);
%匹配特征点
indexPairs1 = matchFeatures(features1, features2);
indexPairs2 = matchFeatures(features2, features3);
%选择匹配点对
matchedPts1 = validPts1(indexPairs1(:,1));
matchedPts2 = validPts2(indexPairs1(:,2));
matchedPts3 = validPts3(indexPairs2(:,2));
%估计变换矩阵
[tform1, inlierPts1, inlierPts2] = estimateGeometricTransform(matchedPts1, matchedPts2, 'projective');
[tform2, inlierPts2, inlierPts3] = estimateGeometricTransform(matchedPts2, matchedPts3, 'projective');
%计算输出图像大小
xlim = [1 size(im1,2)];
ylim = [1 size(im1,1)];
[~,xlim1,ylim1] = imtransform(im1, tform1, 'XData',xlim,'YData',ylim);
[~,xlim2,ylim2] = imtransform(im2, tform2, 'XData',xlim,'YData',ylim);
xMin = min([1;xlim1(:);xlim2(:)]);
xMax = max([size(im3,2);xlim1(:);xlim2(:)]);
yMin = min([1;ylim1(:);ylim2(:)]);
yMax = max([size(im3,1);ylim1(:);ylim2(:)]);
width = round(xMax - xMin);
height = round(yMax - yMin);
%创建输出图像
panorama = zeros([height width 3], 'like', im1);
%将第一张图像拼接到输出图像中
xLimits = [1 size(im1,2)];
yLimits = [1 size(im1,1)];
[im1t,~,~] = imtransform(im1, tform1, 'XData',xLimits,'YData',yLimits);
panorama(1:size(im1t,1), 1:size(im1t,2), :) = im1t;
%将第二张图像拼接到输出图像中
xLimits = [1 size(panorama,2)];
yLimits = [1 size(panorama,1)];
[im2t,~,~] = imtransform(im2, tform2, 'XData',xLimits,'YData',yLimits);
panorama(1:size(im2t,1), 1:size(im2t,2), :) = im2t;
%将第三张图像拼接到输出图像中
tform3 = affine2d([1 0 0; 0 1 0; 0 0 1]);
xLimits = [1 size(panorama,2)];
yLimits = [1 size(panorama,1)];
[im3t,~,~] = imwarp(im3, tform3, 'XData',xLimits,'YData',yLimits);
panorama(1:size(im3t,1), 1:size(im3t,2), :) = im3t;
%显示结果
imshow(panorama);
```
这个示例代码将三张图像拼接在一起,并去除了畸变。你可以根据需要调整参数和算法来实现更好的拼接效果。