CST205 Week 3

Fun with Green Screen

Code:
def chromakey(addition, targetFile, targetX, targetY, overRide = False): newPic = makePicture(addition) bckPic = makePicture(targetFile) for x in range(0, getWidth(newPic)): if x + targetX < getWidth(bckPic): for y in range(0, getHeight(newPic)): if y + targetY < getHeight(bckPic): pix = getPixel(newPic, x, y) bPix = getPixel(bckPic, x + targetX, y + targetY) color = getColor(pix) bColor = getColor(bPix) if (distance(color, Color(0, 215, 0)) > 50) and ((distance(bColor, Color(0, 215, 0)) < 60) or (distance(bColor, Color(0, 131, 0)) < 60) or (distance(bColor, Color(45, 221, 45)) < 60) or overRide): newPix = getPixel(bckPic, x + targetX, y + targetY) setColor(bPix, color) writePictureTo(bckPic, targetFile) return bckPic

Images (not to scale):

Commands:

pic = chromakey("C:\\Path\\to\\Images\\alien.jpg", "C:\\Path\\to\\Images\\newsBackground.jpg", 992, 170)

pic = chromakey("C:\\Path\\to\\Images\\apolloReal.jpg", "C:\\Path\\to\\Images\\newsBackground.jpg", 591, 107)

pic = chromakey("C:\\Path\\to\\Images\\johnl.png", "C:\\Path\\to\\Images\\newsBackground.jpg", 165, 175, True)

pic = chromakey("C:\\Path\\to\\Images\\ticker.jpg", "C:\\Path\\to\\Images\\newsBackground.jpg", 0, 0, True)

Result: