got an error "index exceed matrix dimension"

here sir iwant to read all my file 1224 numbers. But it just read & process only 13 number file then it said " index exceed matrix dimension".... plz help.here i used this following code

workingDir='E:\ flame 1  (500 fps)\';
imageNames = dir(fullfile(workingDir,'*.jpg'));
imageNames = {imageNames.name}';
imageStrings = regexp([imageNames{:}],'(\d*)','match');
imageNumbers = str2double(imageStrings);
[~,sortedIndices] = sort(imageNumbers);
sortedImageNames = imageNames('sortedIndices');

fileID = fopen('img_fstd2.dat','w');
for ii = 1:13%length(sortedImageNames)
    I1 = imread(fullfile(workingDir,sortedImageNames{ii}));
for i=1:530
    for j=1:380
        if I1(i,j)<60
            I1(i,j)=0;
        elseif I1(i,j)>90
             I1(i,j)=1;
        end
     end
end

Answer 1

[Wayne King]

I think you should determine where the error is occurring. In other words, if you remove this for loop:

for i=1:530
    for j=1:380
        if I1(i,j)<60
            I1(i,j)=0;
        elseif I1(i,j)>90
             I1(i,j)=1;
        end
     end

Do you still get the error only running:

workingDir='E:\ flame 1  (500 fps)\';
imageNames = dir(fullfile(workingDir,'*.jpg'));
imageNames = {imageNames.name}';
imageStrings = regexp([imageNames{:}],'(\d*)','match');
imageNumbers = str2double(imageStrings);
[~,sortedIndices] = sort(imageNumbers);
sortedImageNames = imageNames('sortedIndices');

fileID = fopen('img_fstd2.dat','w');
for ii = 1:13%length(sortedImageNames)
    I1 = imread(fullfile(workingDir,sortedImageNames{ii}));
end

Also, I don't think you need that complicated for loop:

for i=1:530
      for j=1:380
          if I1(i,j)<60
              I1(i,j)=0;
          elseif I1(i,j)>90
               I1(i,j)=1;
          end
       end

How about just:

Il(Il<60) = 0;
Il(Il>90) = 1;