python手记(39)

#!/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