Unable to determine file format and Ground truth error... Help

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disp('sparce disctonary processing. . ');
model = cell(1,5);
modelLow = cell(1,5);
DHigh = cell(1,5);
DLow = cell (1,5);
lamda = 0.025;
max_level= 1;
windowSize=5;
skipSize=1;
DictionarySize =100;
%%%%lena Train
dirNameTrain = '.\Train\';
% % outputName = '.\Results2\';
DTrain = dir(dirNameTrain); % check dir command, in matlab documentation
i=3;
ground_truth = [dirNameTrain DTrain(i).name];
patchSize = windowSize ^2;
truth_img = imread(ground_truth);
end

Accepted Answer

Walter Roberson
Walter Roberson on 27 Apr 2018
You are blindly reading in everything in the directory, but your directory contains Thumbs.db as well as whatever content you are expecting. You should be making your dir() more specific.
  3 Comments
Walter Roberson
Walter Roberson on 27 Apr 2018
Change
DTrain = dir(dirNameTrain); % check dir command, in matlab documentation
to
DTrain = dir(fullfile(dirNameTrain, '*.jpg')); % check dir command, in matlab documentation

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