from PIL import Image, ImageEnhance
import numpy
import blend_modes
import sys
import scipy


background_img_raw = Image.open(sys.argv[1])
background_img_raw.putalpha(255)
background_img = numpy.array(background_img_raw)
background_img_float = background_img.astype(float)
foreground_img_raw = Image.open(sys.argv[2])
foreground_img_raw.putalpha(255)
foreground_img = numpy.array(foreground_img_raw)
foreground_img_float = foreground_img.astype(float)
opacity = 1.0
blended_img_float = blend_modes.difference(background_img_float, foreground_img_float, opacity)
r, g, b, a = np.transpose(blended_img_float)
alpha = np.clip((r+g+b)*2, 0, 255)
r = np.clip(r + 100, 0, 255)
g = np.clip(g + 100, 0, 255)
b = np.clip(b + 100, 0, 255)
blended_img_float = np.transpose([r, g, b, alpha])
blended_img = numpy.uint8(blended_img_float)
blended_img_raw = Image.fromarray(blended_img)
blended_img_raw.save(sys.argv[3])