MATLAB: How to Fix Crop Image Error

image processingImage Processing Toolbox

Hi I have a problem croping an image. This is my code but everytime it throws me an error that says "Index exceeds matrix dimensions". In matlab2008 it worked fine, I really don´t know why in matlab2014 throws me this error.
 [filename pathname] = uigetfile({'*.jpg';'*.bmp';'*.tiff'},'File Selector');
  images = strcat(pathname, filename);
  axes(handles.axes1);
  imshow(images);
  axes(handles.axes2);
  im = imread (images);
  e1a1=im(200:1000,2:500);
  imagesc(e1a1);

Best Answer

The image in R2008 was either bigger than 1000 by 500, or it was grayscale. You're either now using a smaller image, or a color one.
fullFileName = fullfile(pathname, filename);
im = imread(fullFileName );
[rows, columns, numberOfColorChannels] = size(im);
if rows < 1000 && columns < 500
    message = sprintf('Error: this image is too small.\nIt has %d rows and %d columns\nand needs at least\n1000 rows and at least 500 columns', rows, columns);
    uiwait(errordlg(message));
    return;
end
if numberOfColorChannels > 3
    % Color image
    e1a1 = im(200:1000, 2:500, :);
else
    % Grayscale image
    e1a1 = im(200:1000, 2:500);
end
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