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#!/usr/bin/python
import urllib2
import sys
import cv2.cv as cv
import numpy
if __name__ == "__main__":
cv.NamedWindow("camera", 1)
capture = cv.CaptureFromCAM(0)
paste = cv.CreateMat(960, 1280, cv.CV_8UC3)
topleft = numpy.asarray(cv.GetSubRect(paste, (0, 0, 640, 480)))
topright = numpy.asarray(cv.GetSubRect(paste, (640, 0, 640, 480)))
bottomleft = numpy.asarray(cv.GetSubRect(paste, (0, 480, 640, 480)))
bottomright = numpy.asarray(cv.GetSubRect(paste, (640, 480, 640, 480)))
while True:
img = cv.GetMat(cv.QueryFrame(capture))
n = (numpy.asarray(img)).astype(numpy.uint8)
red = n[:,:,0]
grn = n[:,:,1]
blu = n[:,:,2]
topleft[:,:,0] = 255 - grn
topleft[:,:,1] = red
topleft[:,:,2] = blu
topright[:,:,0] = blu
topright[:,:,1] = 255 - red
topright[:,:,2] = grn
bottomright[:,:,0] = red
bottomright[:,:,1] = grn
bottomright[:,:,2] = 255 - blu
fgrn = grn.astype(numpy.float32)
fred = red.astype(numpy.float32)
bottomleft[:,:,0] = blu
bottomleft[:,:,1] = (abs(fgrn - fred)).astype(numpy.uint8)
bottomleft[:,:,2] = red
cv.ShowImage("camera", paste)
if cv.WaitKey(6) == 27:
break
cv.DestroyAllWindows()
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