mouseEvent.py

import cv2
import numpy as np

def click_event(event, x, y, flags, param):
    if event == cv2.EVENT_LBUTTONDOWN:
        print(x, ",", y)
        font = cv2.FONT_HERSHEY_COMPLEX_SMALL
        strXY = str(x) + ', ' + str(y)
        cv2.putText(img, strXY, (x,y), font, 1, (0,255, 255), 2, cv2.LINE_AA) 
        cv2.imshow('image', img)
    if event == cv2.EVENT_RBUTTONDOWN:
        blue = img[y, x, 0]
        green = img[y, x, 1]
        red = img[y, x, 2]
        font = cv2.FONT_HERSHEY_COMPLEX_SMALL
        strBGR = str(blue) + ', ' + str(green) + ', ' + str(red)
        cv2.putText(img, strBGR, (x,y), font, 1, (0,255, 255), 2, cv2.LINE_AA) 
        cv2.imshow('image', img)

#img = np.zeros((512, 512, 3), np.uint8)
img = cv2.imread('lena.jfif')
cv2.imshow("image", img)

cv2.setMouseCallback('image', click_event)

cv2.waitKey(0)
cv2.destroyAllWindows()