Question

I need to rotate a lot of images in a folder using Python. I found out, it could be done using ndimage.rotate. But I get a problem, as the image is not being rotated: I wait and wait, and it takes so much time…

This is the discussed part of my code:

for image in filelist:
    print 'Checking ', os.path.basename(image)
    im = misc.imread(image)
    geom = im.shape
    print geom
    if geom[1] > geom[0]:
        # Some code to determine the way image should be rotated, which 
        # calculates angle
        print 'Rotating ', os.path.basename(image)
        rotated = ndimage.rotate(im, angle, reshape = False)
        print 'Rotated ', os.path.basename(image)
        misc.imsave(image, rotated)
    else:
        print os.path.basename(image), ' is OK'

When I run it it works really slow, about 20 sec per image. How to do it faster? I would appreciate any help with it.

And just in case, I am not a professional programmer.

Answer 1

The solution is to use PIL instead of ndimage as deinonychusaur suggested. You might want to look here:
pythonware.com/library/pil/handbook/introduction.htm

It has everything needed to write a program with PIL.