#!/usr/bin/env python

#-*- coding: utf-8 -*-

#code:myhaspl@qq.com

import cv2

import numpy as np

fn="test1.jpg"

print 'http://blog.csdn.net/myhaspl'

print 'myhaspl@qq.com'

print

print 'loading %s ...' % fn

print 'working',

img = cv2.imread(fn)

w=img.shape[1]

h=img.shape[0]

sz1=w

sz0=h

EVENTS = ['CV_EVENT_MOUSEMOVE', 'CV_EVENT_LBUTTONDOWN', 'CV_EVENT_RBUTTONDOWN',  'CV_EVENT_MBUTTONDOWN',  'CV_EVENT_LBUTTONUP',

          'CV_EVENT_RBUTTONUP', 'CV_EVENT_MBUTTONUP'  , 'CV_EVENT_LBUTTONDBLCLK','CV_EVENT_RBUTTONDBLCLK','CV_EVENT_MBUTTONDBLCLK']

def callback_function(event,x,y,flag,param):

        global EVENTS

        global img

        if EVENTS[event]=='CV_EVENT_LBUTTONDOWN':

                print "(%d,%d):"%(y,x)

                print img[y,x,:]

                cv2.imshow('img', img) 

        return

def getdistance(color1,color2):

    return np.sqrt(sum((color1-color2)*(color1-color2)))

cv2.namedWindow('img')

cv2.setMouseCallback('img', callback_function)

cv2.imshow('img', img)

cv2.waitKey()

cv2.destroyAllWindows()

python opencv 鼠标事件