Convert Raw YUYV image from PCam 5C to png

yuv.py

#coding:utf-8
#usage: python yuv.py input_rawdata.dat output_filename.png
from PIL import Image
import sys
f = open(sys.argv[1],"rb")
outfile = sys.argv[2]
WIDTH = 1920
HEIGHT = 1080

im = Image.new("RGB", (WIDTH, HEIGHT))
x = y = 0
for index in range(WIDTH * HEIGHT / 2):
	y1 = ord(f.read(1))
	u = ord(f.read(1)) - 128
	y2 = ord(f.read(1))
	v = ord(f.read(1)) - 128

	r1 = int(y1 + 1.140*v)
	g1 = int(y1 - 0.395*u - 0.581*v)
	b1 = int(y1 + 2.032*u)

	r2 = int(y2 + 1.140*v)
	g2 = int(y2 - 0.395*u - 0.581*v)
	b2 = int(y2 + 2.032*u)

	r1 = min(max(r1,0), 255)
	g1 = min(max(g1,0), 255)
	b1 = min(max(b1,0), 255)
	r2 = min(max(r2,0), 255)
	g2 = min(max(g2,0), 255)
	b2 = min(max(b2,0), 255)
  
	im.putpixel((x,y), (r1,g1,b1))
	im.putpixel((x+1,y), (r2,g2,b2))
	x = x + 2
	if(x == WIDTH):
		x = 0
		y = y + 1

im.save(outfile)