Opencv color detection

 

import cv2
	import numpy as np
	import pyautogui
	cap = cv2.VideoCapture(1)
	yellow_lower = np.array([22, 93, 0])
	yellow_upper = np.array([45, 255, 255])
	prev_y = 0
	while True:
	ret, frame = cap.read()
	hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
	mask = cv2.inRange(hsv, yellow_lower, yellow_upper)
	contours, hierarchy = cv2.findContours(mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
	for c in contours:
	area = cv2.contourArea(c)
	if area > 300:
	x, y, w, h = cv2.boundingRect(c)
	cv2.rectangle(frame, (x, y), (x+w, y+h), (0, 255, 0), 2)
	if y < prev_y:
	pyautogui.press('space')
	prev_y = y
	cv2.imshow('frame', frame)
	if cv2.waitKey(10) == ord('q'):
	break
	cap.release()
	cv2.destroyAllWindows()