[求助]matlab图象处理的问题

Blackeye · 发表于 2006-1-7 13:14

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我没学过matlab,但最近需要用到下面这个程序，对于一些语句的功能我不太懂，你各位高手赐教，不胜感激！！！！ onion = imread('onion.png'); peppers = imread('peppers.png');
imshow(onion) figure, imshow(peppers)
 % non-interactively rect_onion = [111 33 65 58]; rect_peppers = [163 47 143 151]; sub_onion = imcrop(onion,rect_onion); sub_peppers = imcrop(peppers,rect_peppers);
% OR
% interactively %[sub_onion,rect_onion] = imcrop(onion); % choose the pepper below the 
onion %[sub_peppers,rect_peppers] = imcrop(peppers); % choose the whole onion
% display sub images figure, imshow(sub_onion) figure, imshow(sub_peppers)
 c = normxcorr2(sub_onion(:,:,1),sub_peppers(:,:,1)); figure, surf(c), shading flat
 % offset found by correlation [max_c, imax] = max(abs(c(:))); [ypeak, xpeak] = ind2sub(size(c),imax(1)); corr_offset = [(xpeak-size(sub_onion,2)) (ypeak-size(sub_onion,1))];
% relative offset of position of subimages rect_offset = [(rect_peppers(1)-rect_onion(1)) (rect_peppers(2)-rect_onion(2))];
% total offset offset = corr_offset + rect_offset; xoffset = offset(1); yoffset = offset(2);

xbegin = round(xoffset+1); xend = round(xoffset+ size(onion,2)); ybegin = round(yoffset+1); yend = round(yoffset+size(onion,1));
% extract region from peppers and compare to onion extracted_onion = peppers(ybegin:yend,xbegin:xend,:); if isequal(onion,extracted_onion) disp('onion.png was extracted from peppers.png') end
 recovered_onion = uint8(zeros(size(peppers))); recovered_onion(ybegin:yend,xbegin:xend,:) = onion; figure, imshow(recovered_onion)
 [m,n,p] = size(peppers); mask = ones(m,n); i = find(recovered_onion(:,:,1)==0); mask(i) = .2; % try experimenting with different levels of % transparency
% overlay images with transparency figure, imshow(peppers(:,:,1)) % show only red plane of peppers hold on h = imshow(recovered_onion); % overlay recovered_onion set(h,'AlphaData',mask)

Blackeye · 发表于 2006-1-7 13:41

<DIV class=quote>
我没学过matlab,但最近需要用到下面这个程序，对于一些语句的功能我不太懂，你各位高手赐教，不胜感激！！！！ onion = imread('onion.png'); peppers = imread('peppers.png');
imshow(onion) figure, imshow(peppers)请问能否确定读出图片的区域值？？
 % non-interactively rect_onion = [111 33 65 58]; rect_peppers = [163 47 143 151];怎么确定要剪切的图片的区域范围？？ sub_onion = imcrop(onion,rect_onion); sub_peppers = imcrop(peppers,rect_peppers);
% OR
% interactively %[sub_onion,rect_onion] = imcrop(onion); % choose the pepper below the 
onion %[sub_peppers,rect_peppers] = imcrop(peppers); % choose the whole onion
% display sub images figure, imshow(sub_onion) figure, imshow(sub_peppers)
后面的好多语句不知道什么意思，恳请各位高手将每句注释一下，谢谢！！ c = normxcorr2(sub_onion(:,:,1),sub_peppers(:,:,1)); figure, surf(c), shading flat
 % offset found by correlation [max_c, imax] = max(abs(c(:))); [ypeak, xpeak] = ind2sub(size(c),imax(1)); corr_offset = [(xpeak-size(sub_onion,2)) (ypeak-size(sub_onion,1))];
% relative offset of position of subimages rect_offset = [(rect_peppers(1)-rect_onion(1)) (rect_peppers(2)-rect_onion(2))];
% total offset offset = corr_offset + rect_offset; xoffset = offset(1); yoffset = offset(2);
xbegin = round(xoffset+1); xend = round(xoffset+ size(onion,2)); ybegin = round(yoffset+1); yend = round(yoffset+size(onion,1));
% extract region from peppers and compare to onion extracted_onion = peppers(ybegin:yend,xbegin:xend,:); if isequal(onion,extracted_onion) disp('onion.png was extracted from peppers.png') end
 recovered_onion = uint8(zeros(size(peppers))); recovered_onion(ybegin:yend,xbegin:xend,:) = onion; figure, imshow(recovered_onion)
 [m,n,p] = size(peppers); mask = ones(m,n); i = find(recovered_onion(:,:,1)==0); mask(i) = .2; % try experimenting with different levels of % transparency
% overlay images with transparency figure, imshow(peppers(:,:,1)) % show only red plane of peppers hold on h = imshow(recovered_onion); % overlay recovered_onion set(h,'AlphaData',mask)</DIV>

happy · 发表于 2006-1-7 13:52

<DIV class=quote>以下是引用Blackeye在2006-1-7 13:41:23的发言： 
<DIV class=quote>
我没学过matlab,但最近需要用到下面这个程序，对于一些语句的功能我不太懂，你各位高手赐教，不胜感激！！！！ onion = imread('onion.png'); peppers = imread('peppers.png');
imshow(onion) figure, imshow(peppers)请问能否确定读出图片的区域值？？ imread读入的时候就已经确定大小了，矩阵的大小表示的就是图片的大小，比如： onion = imread('onion.png'); [m n k]=size(inion); 则m表示纵向的像素点数，n表示横向的像素点数 
 % non-interactively rect_onion = [111 33 65 58]; rect_peppers = [163 47 143 151];怎么确定要剪切的图片的区域范围？？ 这个要看你自己的要求，你要去哪一部分就选取哪一部分 sub_onion = imcrop(onion,rect_onion); sub_peppers = imcrop(peppers,rect_peppers);
% OR
% interactively %[sub_onion,rect_onion] = imcrop(onion); % choose the pepper below the 
onion %[sub_peppers,rect_peppers] = imcrop(peppers); % choose the whole onion
% display sub images figure, imshow(sub_onion) figure, imshow(sub_peppers)
后面的好多语句不知道什么意思，恳请各位高手将每句注释一下，谢谢！！ 请说明具体那些语句 c = normxcorr2(sub_onion(:,:,1),sub_peppers(:,:,1)); figure, surf(c), shading flat
 % offset found by correlation [max_c, imax] = max(abs(c(:))); [ypeak, xpeak] = ind2sub(size(c),imax(1)); corr_offset = [(xpeak-size(sub_onion,2)) (ypeak-size(sub_onion,1))];
% relative offset of position of subimages rect_offset = [(rect_peppers(1)-rect_onion(1)) (rect_peppers(2)-rect_onion(2))];
% total offset offset = corr_offset + rect_offset; xoffset = offset(1); yoffset = offset(2);
xbegin = round(xoffset+1); xend = round(xoffset+ size(onion,2)); ybegin = round(yoffset+1); yend = round(yoffset+size(onion,1));
% extract region from peppers and compare to onion extracted_onion = peppers(ybegin:yend,xbegin:xend,:); if isequal(onion,extracted_onion) disp('onion.png was extracted from peppers.png') end
 recovered_onion = uint8(zeros(size(peppers))); recovered_onion(ybegin:yend,xbegin:xend,:) = onion; figure, imshow(recovered_onion)
 [m,n,p] = size(peppers); mask = ones(m,n); i = find(recovered_onion(:,:,1)==0); mask(i) = .2; % try experimenting with different levels of % transparency
% overlay images with transparency figure, imshow(peppers(:,:,1)) % show only red plane of peppers hold on h = imshow(recovered_onion); % overlay recovered_onion set(h,'AlphaData',mask)</DIV> </DIV>

Blackeye · 发表于 2006-1-7 15:19

（1） c = normxcorr2(sub_onion(:,:,1),sub_peppers(:,:,1)); normxcorr2是实现什么功能？？(:,:,1)是什么参数？？ 以下也大多是一些函数的功能不知道 （2）[max_c, imax] = max(abs(c(:))); [ypeak, xpeak] = ind2sub(size(c),imax(1)); corr_offset = [(xpeak-size(sub_onion,2)) (ypeak-size(sub_onion,1))]; 谢谢！！！ （3） [m,n,p] = size(peppers); mask = ones(m,n); i = find(recovered_onion(:,:,1)==0); mask(i) = .2; % try experimenting with different levels of % transparency

suffer · 发表于 2006-1-7 17:51

<DIV class=quote>以下是引用Blackeye在2006-1-7 15:19:08的发言： （1） c = normxcorr2(sub_onion(:,:,1),sub_peppers(:,:,1)); normxcorr2是实现什么功能？？(:,:,1)是什么参数？？ 以下也大多是一些函数的功能不知道 （2）[max_c, imax] = max(abs(c(:))); [ypeak, xpeak] = ind2sub(size(c),imax(1)); corr_offset = [(xpeak-size(sub_onion,2)) (ypeak-size(sub_onion,1))]; 谢谢！！！ （3） [m,n,p] = size(peppers); mask = ones(m,n); i = find(recovered_onion(:,:,1)==0); mask(i) = .2; % try experimenting with different levels of % transparency </DIV>
 help 或者 doc自己啊

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[求助]matlab图象处理的问题

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[求助]matlab图象处理的问题（图形简切与恢复）

回复：（Blackeye）[求助]matlab图象处理的问题（图形...

多谢您的指导，我还有下面这些语句的功能不清楚，请赐教~~~

回复：（Blackeye）多谢您的指导，我还有下面这些语句...