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How to compare images from 2 folders

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Fateme Jalali
Fateme Jalali 2016-7-30
评论： 90Anonymous 2018-12-9
Hello.I have 2 folders of images and want to compare each image in folder 1 with each image in folder 2 in order to find almost similar images. I wrote the code but it can not open images in for loop.can any one help me plz? Here is my code:
doc1 = dir('E:\fake1\*.jpg');
doc2 = dir('E:\fake2\*.jpg');
d_1 = size(doc1);
d_2 = size(doc2);
Inputs1 = {doc1.name}';
Inputs2 = {doc2.name}';
for I1 = 1:d_1;
for I2 = 1:d_2;
X_1 = imread([doc1 Inputs1{I1}]);
X_2 = imread([doc2 Inputs2{I2}]);
compare_images = imabsdiff(X_1,X_2);
figure;
imshow(compare_images);
title('compare_images');
%comp1 = imshowpair(X_1,X_2,'diff');
end
end

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采纳的回答

Image Analyst
Image Analyst 2016-7-30
Fateme, this is in the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F Look at the second code block.

更多回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2016-7-30
编辑：Azzi Abdelmalek 2016-7-30
X_1 = imread(fullfile(doc1,Inputs1{I1}))
%or
X_1 = imread([doc1 '\' Inputs1{I1}])
  1 个评论
Fateme Jalali
Fateme Jalali 2016-7-30
It does not work and error exists.this is the error: Undefined function or method 'eq' for input arguments of type 'struct'.
Error in ==> fullfile at 37 if (f(end)==fs) && (part(1)==fs),
Error in ==> COMPAREimages9mordad at 19 X_1 = imread(fullfile(doc1,Inputs1{I1}));

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Walter Roberson
Walter Roberson 2016-7-31
first_dir = 'E:\fake1';
second_dir = 'E:\fake2';
doc1 = dir(fullfile(first_dir, '*.jpg'));
doc2 = dir(fullfile(second_dir, '*.jpg'));
d_1 = length(doc1);
d_2 = length(doc2);
Inputs1 = {doc1.name}';
Inputs2 = {doc2.name}';
for I1 = 1:d_1
first_base = Inputs1{I1};
first_file = fullfile(first_dir, first_base);
X_1 = imread(first_file);
for I2 = 1:d_2
second_base = Inputs2{I1};
second_file = fullfile(second_dir, second_base);
X_2 = imread(second_file);
compare_images = imabsdiff(X_1,X_2);
figure;
imshow(compare_images);
title( sprintf('"%s" vs "%s"', second_base, first_base) );
%comp1 = imshowpair(X_1,X_2,'diff');
end
end
  2 个评论
Image Analyst
Image Analyst 2018-12-7
Try this:
first_dir = 'D:\My Pictures\Misc';
second_dir = 'D:\My Pictures\Wallpapers';
fileList1 = dir(fullfile(first_dir, '*.jpg'));
fileList2 = dir(fullfile(second_dir, '*.jpg'));
numFiles1 = length(fileList1);
numFiles2 = length(fileList2);
baseFileNames1 = {fileList1.name}';
baseFileNames2 = {fileList2.name}';
for I1 = 1:numFiles1
firstBaseName = baseFileNames1{I1};
firstFullFileName = fullfile(first_dir, firstBaseName);
image1 = imread(firstFullFileName);
for I2 = 1:numFiles2
fprintf('\nComparing image #%d of %d in folder 1 to #%d of %d in folder 2.\n', ...
I1, numFiles1, I2, numFiles2);
secondBaseName = baseFileNames2{I2};
secondFullFileName = fullfile(second_dir, secondBaseName);
image2 = imread(secondFullFileName);
if isequal(size(image1), size(image2))
compare_images = imabsdiff(image1,image2);
% Sizes match. Subtract them and display the differences.
figure;
imshow(compare_images);
title( sprintf('"%s" vs "%s"', secondBaseName, firstBaseName) );
%comp1 = imshowpair(X_1,X_2,'diff');
else
% Sizes do NOT match. Print out that they don't match, then continue.
fprintf(' Not comparable because sizes do not match.\n');
[rows, columns, numColorChannels] = size(image1);
fprintf(' %s = %d rows by %d columns by %d color channels.\n', firstFullFileName, rows, columns, numColorChannels);
[rows, columns, numColorChannels] = size(image2);
fprintf(' %s = %d rows by %d columns by %d color channels.\n', secondFullFileName, rows, columns, numColorChannels);
end
end
end
90Anonymous
90Anonymous 2018-12-9
@Image Analyst: Thank you so much for your support. It works fine now; for both scenarios.
Thanks again!

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