Python-openCV查看图像像素值,获取鼠标位置

#showPixelValue.py

import cv2
import sys

def getMousePos(imgName):
  def onmouse(event, x, y, flags, param):   
    cv2.imshow("img",img)
    #if event==cv2.EVENT_MOUSEMOVE:     
      #print(img[y,x], " pos: ", x, " x ", y) 
      
    #双击左键，显示鼠标位置
    if event == cv2.EVENT_LBUTTONDBLCLK:
      strtext = "(%s,%s)"%(x