How can I compare whole set of binary images

2 次查看(过去 30 天)
Hey people,
I need a help, because I don't know how to extricate myself from a code. My code has to compare two binary images. Image 1 has just some pixels with value 0 and that is also case for Image 2. So, task of my code is to compare if those pixels are overlapped, and if so, overlapped pixels on Image 2 would get a value 1. It has do a recursion for a set of binary images.
I've already done something, but manually.
Example:
I give you my unfinished code, but there are some written comments what it needs to do at those lines.
myFolderInput = 'F:\input_with_flakes\';
myFolderOutput= 'F:\output_wihout_flakes\';
if ~isdir(myFolderInput)
errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolderInput);
uiwait(warndlg(errorMessage));
return;
end
if ~isdir(myFolderOutput)
errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolderOutput);
uiwait(warndlg(errorMessage));
return;
end
filePattern = fullfile(myFolderInput, '*.jpg');
jpegFiles = dir(filePattern);
for k = 1:length(jpegFiles)
baseFileName = jpegFiles(k).name;
fullFileName = fullfile(myFolderInput, baseFileName);
fprintf(1, 'Now reading %s\n', fullFileName);
imageArray = imread(fullFileName);
[i j]=size(imageArray)
if k==1
fprintf('The first one is skipped\n')
else
for m=1:i
for n=1:j
if imageArray(m,n)==imageArray(m,n) % if Previous Image(m,n)==Current Image(m,n)
imageArray(m,n)=1; % Current Image(m,n)=1;
elseif imageArray(m,n)==0 % elseif Current Image(m,n)==0
imageArray(m,n)=0; % Current Image(m,n)=0;
end
end
end
end
filename = sprintf('Excluded_%s', baseFileName);
imwrite(imageArray,[myFolderOutput, filename],'jpeg');
end

回答(1 个)

Christian Lenz
Christian Lenz 2012-7-25
Would it be possible to use a simpler code?
imgOverlap_pos = img1 .* img2;
This is pixel-wise multiplication. It can be 0*0=0, 0*1=0, 1*0=0, 1*1=0. So your resulting image shows ones in the places where the two images overlap. Then do the same with the negative images.
imgOverlap_neg = imcomplement(img1) .* imcomplement(img2);
And your result would be:
imgOverlap = imgOverlap_pos + imgOverlap_neg;
Around that you'll then need one loop to go through all your images.

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