Opencv获取图片像素点并打印输出

按下esc键退出

import cv2
import numpy as np
img=cv2.imread('2.png')
a = []
b = []
def on_EVENT_LBUTTONDOWN(event, x, y, flags, param):
    if event == cv2.EVENT_LBUTTONDOWN:
        xy = "%d,%d" % (x, y)
        a.append(x)
        b.append(y)
        cv2.circle(img, (x, y), 1, (0, 0, 255), thickness = -1)
        cv2.putText(img, xy, (x, y), cv2.FONT_HERSHEY_PLAIN,
                    1.0, (0,0,0), thickness = 1)
        cv2.imshow("image", img)
cv2.namedWindow("image")
cv2.setMouseCallback("image", on_EVENT_LBUTTONDOWN)
while(1):
    cv2.imshow("image", img)
    if cv2.waitKey(0)&0xFF==27:    # Esc的ASCII码为27,按下esc，即退出
        break
cv2.destroyAllWindows()
print(list(zip(a,b)))

点击右上角×号或esc退出

import cv2
import numpy as np
# 图片路径
img = cv2.imread('2.png')
a = []
b = []
def on_EVENT_LBUTTONDOWN(event, x, y, flags, param):
    if event == cv2.EVENT_LBUTTONDOWN:
        xy = "%d,%d" % (x, y)
        a.append(x)
        b.append(y)
        cv2.circle(img, (x, y), 1, (0, 0, 255), thickness=-1)
        cv2.putText(img, xy, (x, y), cv2.FONT_HERSHEY_PLAIN,
                    1.0, (0, 0, 0), thickness=1)
        cv2.imshow("image", img)

cv2.namedWindow("image")
cv2.setMouseCallback("image", on_EVENT_LBUTTONDOWN)
cv2.imshow("image", img)
cv2.waitKey(0)
print(list(zip(a, b)))