import numpy as np
import cv2

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,(255,255,0),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_SMALL
        strBGR=str(blue)+','+str(green)+','+str(red)
        cv2.putText(img,strBGR,(x,y),font,1,(0,0,0),1)
        cv2.imshow('image',img)
    

#img=np.zeros((512,512,3),np.uint8)
img=cv2.imread('bridge.png')
cv2.imshow('image',img)
cv2.setMouseCallback('image',click_event)
cv2.waitKey(0)
cv2.destroyAllWindows() 

