Python Webcam Laser Tracking

simpleLaserTracking

from PIL import Image
import psyco

class Tracker(object):
    def __init__(self):
        psyco.full()
        self.createVariables()
    def createVariables(self):
        pass
    def track(self, image):
        self.whitelist = []
        pixels = image.load()
        for y in range(image.size[1]):
            for x in range(image.size[0]):
                
                if pixels[x,y][0] > 245 and pixels[x,y][1] > 245 and pixels[x,y][2] > 245:
                    self.whitelist.append((x,y))
                    pixels[x,y] = (0,255,0)

        left = top = 1000
        right = bottom = 0
        for x,y in self.whitelist:
            if x < left:
                left = x
            if x > right:
                right = x
            if y < top:
                top = y
            if y > bottom:
                bottom = y

        center = (((right + left)/2),((bottom+top) / 2))

        if len(self.whitelist) > 0:
            for z in range(image.size[1]):
                pixels[center[0], z] = (0,0,255)
            for z in range(image.size[0]):
                pixels[z, center[1]] = (0,0,255)
                      
        return image