Multiple Image Matching using SURF detectors
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Aishwarya Iyengar
on 8 Jul 2020
Commented: Image Analyst
on 9 Jul 2020
I want to compare (features) 300 images with other 300 images using SURF detectors.
With the program below, I'm facing a problem. With the 1st folder, all images are matching with only 1 image of 2nd folder.
But I want to match all 300 images with 300 images.
Can anyone help ?
path_directory_1 = 'fall';
original_files_1 = dir([path_directory_1 '/*.png']);
path_directory_2 = 'winter';
original_files_2 = dir([path_directory_2 '/*.png']);
for i = 1:length(original_files_1)
filename = ([path_directory_1 '/' original_files_1(i).name]);
I1 = rgb2gray(imread(filename))
points1 = detectSURFFeatures(I1)
[f1,vpts1] = extractFeatures(I1, points1)
for j = 1:length(original_files_2)
filename = ([path_directory_2 '/' original_files_2(j).name]);
I2 = rgb2gray(imread(filename))
points2 = detectSURFFeatures(I2)
[f2,vpts2] = extractFeatures(I2, points2)
end
indexPairs = matchFeatures(f1,f2)
matchedPoints1 = vpts1(indexPairs(:,1))
matchedPoints2 = vpts2(indexPairs(:,2))
figure; ax = axes;
showMatchedFeatures(I1, I2, matchedPoints1, matchedPoints2,'montage','Parent',ax);
legend(ax,'matchedPoints1','matchedPoints2');
end
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Accepted Answer
Image Analyst
on 8 Jul 2020
Works for me. Try this more robust code and tell me what you see in the command window:
path_directory_1 = 'fall';
% path_directory_1 = pwd;
path_directory_2 = 'winter';
% path_directory_2 = pwd;
% Alert user if either folder does not exist, then exit.
if ~isfolder(path_directory_1)
warningMessage = sprintf('Folder %s does not exist.', path_directory_1);
uiwait(errordlg(warningMessage));
return;
end
if ~isfolder(path_directory_2)
warningMessage = sprintf('No %s files found in folder %s', path_directory_2);
uiwait(errordlg(warningMessage));
return;
end
% Get file names.
filePattern = fullfile(path_directory_1, '/*.png');
original_files_1 = dir(filePattern);
filePattern = fullfile(path_directory_2, '/*.png');
original_files_2 = dir(filePattern);
% Alert user if either folder does not have any files in it.
if isempty(original_files_1)
warningMessage = sprintf('No %s files found in folder %s', filePattern, path_directory_1);
uiwait(warndlg(warningMessage));
end
if isempty(original_files_2)
warningMessage = sprintf('No %s files found in folder %s', filePattern, path_directory_2);
uiwait(warndlg(warningMessage));
end
for i = 1:length(original_files_1)
filename = ([path_directory_1 '/' original_files_1(i).name]);
fprintf('\nComparing folder 1 file "%s"\n', filename);
for j = 1:length(original_files_2)
filename = ([path_directory_2 '/' original_files_2(j).name]);
fprintf(' to folder 2 file "%s"\n', filename);
end
end
9 Comments
Image Analyst
on 9 Jul 2020
Sorry, I can't help you. S() is not a built-in function of MATLAB so presumably it's a custom function that you already have so go ahead and use it. And "the matched features of images in terms of binary" makes no sense to me so perhaps an example would help.
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