OpenCV 获取 鼠标位置(在图像上获鼠标所在像素点)python

在图像上获取 鼠标所作位置的像素

import numpy as np
import cv2
import sys

#events = [ i for i in dir(cv2) if 'EVENT' in i] # Name of all function with 'EVENT'
#print(events)

def click_event(event, x, y, flags, param):
	if event == cv2.EVENT_LBUTTONDOWN:
		print(x, ',',y)
		font = cv2.FONT_HERSHEY_SIMPLEX
		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_SIMPLEX
                strBGR = str(blue) + ', '+ str(green)+ ', '+ str(red)
                #cv2.namedWindow('image',0)
                cv2.putText(img, strBGR, (x ,y), font, 2, (0,255,255), 3)
                cv2.imshow('image',img)
#img = np.zeros((512,512,3),np.uint8)
cv2.namedWindow('image',0)
img = cv2.imread(str(sys.argv[1]))
cv2.imshow('image',img)
cv2.setMouseCallback('image',click_event)
cv2.waitKey(0)
cv2.imwrite('./point_param.jpg',img)
cv2.destroyAllWindows()

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