Just get the list of filenames in handles.files - I assume that's a listbox of image file names that the user clicks on. Then display it
% Get image name
selectedItem = get(handles.lstImageList, 'Value'); % Get number they clicked on.
fileList = get(handles.lstImageList, 'string'); % Get entire list of all files.
% If only one is selected, display it.
if length(selectedItem) == 1
fullImageFileName = fullfile(yourFolder, fileList{selectedItem});
% Display it
imageArray = imread(fullImageFileName);
imshow(imageArray, []);
end
