ImageMagickで画像ファイルのＤｉｆｆをとる

ImageMagick_Diff.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os
import sys

#----------------------------------------------------------------
# ImageMagick Diff
#
#   Copyright 2016 Yoshihito Aso
#----------------------------------------------------------------

class ImageMagick_Diff:

    def __init__(self, in_file1, in_file2, out_file):
        self.in_file1 = in_file1
        self.in_file2 = in_file2
        self.out_file = out_file

    def diff(self):
        cmd = "composite -compose difference " + str(in_file1) + " " + str(in_file2) + " " + str(out_file)
        os.system(cmd);


if __name__ == "__main__":

    # 引数のチェック
    argvs = sys.argv
    argc = len(argvs)

    if (argc != 4):
        print 'Usage: # python %s in_file1 in_file2 diff_file' % argvs[0]
        quit()

    in_file1 = argvs[1]
    in_file2 = argvs[2]
    out_file = argvs[3]

    IM_Diff = ImageMagick_Diff(in_file1,in_file2,out_file)
    IM_Diff.diff()