def rmsdiff_2011(image1, image2):
"""Calculate the root-mean-square difference between two images
http://code.activestate.com/recipes/577630/
"""
im1 = lib.open_image(image1)
im2 = lib.open_image(image2)
if im1.size != im2.size:
# print("rmsdiff_2011", im1.size, im2.size)
# print("Warning: Size of the two images not equal!")
# lib.write_log("rmsdiff_2011", im1.size, im2.size)
# lib.write_log("Warning: Size of the two images not equal!")
return "Warning: Size of the two images not equal!" + str(im1.size) + str(im2.size)
diff = ImageChops.difference(im1.convert("RGBA"), im2.convert("RGBA"))
h = diff.histogram()
sq = (value * (idx ** 2) for idx, value in enumerate(h))
sum_of_squares = sum(sq)
rms = math.sqrt(sum_of_squares / float(im1.size[0] * im1.size[1]))
return rms
def generate_compare_image(image1, image2):
folder = os.path.dirname(image1)
img1_name = os.path.basename(image1)
img2_name = os.path.basename(image2)
img1_name = ".".join(img1_name.split(".")[:-1])
img2_name = ".".join(img2_name.split(".")[:-1])
image1 = lib.open_image(image1)
image2 = lib.open_image(image2)
diff_image = ImageChops.difference(image1.convert("RGBA"), image2.convert("RGBA"))
diff_image = diff_image.convert("L")
diff_image = diff_image.point(([0] + ([255] * 255)))
new_image = diff_image.convert("RGB")
if image1.size == image2.size:
new_image.paste(image2, mask=diff_image)
else:
print ("two images size not equal:", image1.size, image2.size)
# lib.write_log("two images size not equal:", image1.size, image2.size)
new_image.save(os.path.join(folder, img1_name + "__VS__" + img2_name + ".png"))