How to open multiple images, processing each image, then saving it into a folder?

My code is as below,

file = dir('C:\Users\doey\Desktop\New folder');  
file = file(~[file.isdir]); NF = length(file);  
for k = 1 : NF  
    Img = imread(fullfile('C:\Users\doey\Desktop\New folder', file(k).name)); 
    % Processing the image 
    % Obtain figure(k)

     print(figure(k),'-dpng','C:\Users\doey\Desktop\New folder (2)')
     close(gcf)
end

Can anyone answer these 2 questions:

1) The figures which I obtain are not saving in my directory (C:\Users\doey\Desktop\New folder) although I can show it during my processing.

2) I cannot load tiff images with this code. Why not???

Answer 1

[Image Analyst]

It should be easy to adapt the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Let us know if you can't.

[inter steller]

i can read the file now , but why i still can't save my figure? as the code above , after i done my image processing for multiple images, i were plotted something for every image, and i need to auto-save them into a folder.

[Image Analyst]

Like the FAQ says, create your filename using sprintf() and fullfile(). Then you just call imwrite(yourImage, fullFileName) to write it out to a disk file in the folder. If you want to write the whole figure or axes, because you have put up some graphical overlay onto the image, then use export_fig() instead.

You're using print() instead, which might be okay, but you're just giving it a folder name and not a filename. Try constructing a filename:

fullFileName = fullfile('C:\Users\doey\Desktop\New folder', file(k).name)
[folder, fn, ext] = fileparts(fullFileName);
% Change extension to .png.
fn = sprintf('%s.png', fn);
% Prepend folder
fullFileName = fullfile(folder, fn);
% Save to disk.
print(figure(k), fullFileName);