Simple script to control your mouse pointer with a laser and a webcam (only works on Windows)

lasermouse.py

import cv2
import numpy as np
import win32api, win32con
import math

webcam_x = 640 #Set webcam resolution
webcam_y = 640
screen_x = 1280 #Set screen resolution
screen_y = 1024

cam = cv2.VideoCapture(0) #Pick a webcam (change 0 to something else if this doesn't work)
cam.set(cv2.CAP_PROP_AUTO_EXPOSURE, 0) #Turn off auto-exposure
cam.set(cv2.CAP_PROP_EXPOSURE, -5.0)  #Set exposure extremely low
while True:
	ret_val, img = cam.read()
	grey = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
	laser_pos = cv2.minMaxLoc(grey)
	x = math.floor(laser_pos[3][0]/webcam_x*screen_x)
	y = math.floor(laser_pos[3][1]/webcam_y*screen_y)
	win32api.SetCursorPos((x,y))