1from PIL.ImageChops import difference
 2from PIL.ImageOps import autocontrast
 3from PIL.Image import open as PIOpen
 4
 5class VideoFrame(object):
 6    def __init__(self, pilImage):
 7        self.image = pilImage.convert('RGB')
 8
 9    @staticmethod
10    def diff(a, b):
11        diff = difference(a.image, b.image)
12        diffNormalized = autocontrast(diff)
13        return (VideoFrame(diff), VideoFrame(diffNormalized))
14
15    @staticmethod
16    def load(path):
17        with open(path, 'rb') as f:
18            image = PIOpen(f)
19            image.load()
20            return VideoFrame(image)
21
22    def save(self, path):
23        return self.image.save(path)