MATLAB: Calculate number of images

calculatedirectoryimagesnumber

 d = dir('*.bmp');
 n = length(d);

i have a folder and i am calculating number of images in that folder, but it calculates only .bmp images.. Some times there will be png images also.. But whenever there will be images it will be of same extension. So, i want to make general code.. Whatever the images, it should calculate..

so, what should be the change in first line of code, if there are png images..?

Best Answer

d = dir('*.bmp')

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MATLAB: Saving images as a database

Try this snippet. Set folder to:

folder = 'F:\matlab\face\data';
ListOfImageNames = {};
ImageFiles = dir([folder'/*.*']); % Get all files.
for Index = 1:length(ImageFiles)
  baseFileName = ImageFiles(Index).name;
  [folder, name, extension] = fileparts(baseFileName);
  extension = upper(extension);
  % Let's save just those we are interested in:
  switch lower(extension)
  case {'.png', '.bmp', '.jpg', '.tif', '.avi'}
    % Allow only PNG, TIF, JPG, or BMP images
    ListOfImageNames = [ListOfImageNames baseFileName];
  otherwise
  end
end
% Now ListOfImageNames is a list of all image format files.
% Now do whatever you want with that list.

MATLAB: Load folder’s images names to a Matlab listbox

You will get that error message if you had one folder and had, say, the 10'th item in the listbox selected. Then if you went to another folder and called LoadImageList() and that folder only had, say, 5 images. The listbox would still have a "value" property of 10 but there are only 5 items there. It can't select the 10th item, so it throws that warning message.

What you need to do is to add something like this after the for loop

if length(ListOfImageNames) >= 1
    set(handles.lstImageList, 'value', 1); % Select first item in listbox.
else
    set(handles.lstImageList, 'value', []); % Deselect all items.
end

Best Answer

Related Solutions

MATLAB: Saving images as a database

MATLAB: Load folder’s images names to a Matlab listbox

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