camera_test.py

import cv2

def mouseRGB(event,x,y,flags,param):
    if event == cv2.EVENT_LBUTTONDOWN: #checks mouse left button down condition
        colorsB = img[y,x,0]
        colorsG = img[y,x,1]
        colorsR = img[y,x,2]
        colors = img[y,x]
        print("Red: ",colorsR)
        print("Green: ",colorsG)
        print("Blue: ",colorsB)
        print("BRG Format: ",colors)
        print("Coordinates of pixel: X: ",x,"Y: ",y)


def show_webcam(mirror=False):
    global img
    cam = cv2.VideoCapture(4)
    cv2.namedWindow('my webcam')
    cv2.setMouseCallback('my webcam',mouseRGB)
    while True:
        ret_val, img = cam.read()
        if mirror:
            img = cv2.flip(img, 1)
        cv2.imshow('my webcam', img)
        if cv2.waitKey(1) == 27:
            break  # esc to quit
    cv2.destroyAllWindows()


def main():
    show_webcam(mirror=True)


if __name__ == '__main__':
    main()