mouse event.py

import numpy as np
import cv2

# events=[i for i in dir(cv2) if 'EVENT' in i]
# print (events)

def click_event(event,x,y,flags,param): #these parameters are same everywhere in mouse event
    if event== cv2.EVENT_LBUTTONDOWN:
        print(x,', ',y)
        font=cv2.FONT_HERSHEY_COMPLEX
        strXY=str(x)+', '+str(y)
        cv2.putText(img,strXY,(x,y),font,0.5,(255,0,0),1)
        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
        bgr = str(blue)+', '+str(green)+', '+str(red)
        cv2.putText(img, bgr, (x, y), font, 0.5, (255, 0, 0), 1)
        cv2.imshow('image', img)

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

cv2.setMouseCallback('image',click_event)
cv2.waitKey(0)
cv2.destroyAllWindows()