if all the files are in the same folder you could use:
pathtofiles = '/path/to/folder/';
allfiles = dir(pathtofiles); % use dir to get the file
% information of directory
selection_of_jpg_files = ~([allfiles.isdir]) % only files that are not (~)
% a directory
for index = find(selection_of_jpg_files)
if strcmp(allfiles(index).name(end-3:end),'jpg') % check if the file is a jpg
IMG = imread(fullfile(pathtofile,allfiles(index).name) % load the file
% now do something with the IMG...
end
end