Python 在openCV中使用鼠标动态绘制圆

我一直在尝试制作一个OpenCV Py程序，通过鼠标点击和拖动来绘制矩形、直线和圆。我可以成功地为直线和矩形这样做，但圆的代码是错误的，我需要帮助

import numpy as np
import cv2 as cv
import math
drawing = False # true if mouse is pressed
ix,iy = -1,-1
# mouse callback function
def draw_circle(event,x,y,flags,param):
    global ix,iy,drawing
    if event == cv.EVENT_LBUTTONDOWN:
        drawing = True
        ix,iy = x,y
    elif event == cv.EVENT_MOUSEMOVE:
        if drawing == True:
             k = cv.waitKey(33)

             if k == ord('r'):
                cv.rectangle(img,(ix,iy),(x,y),(0,255,0),-1)
             elif k==ord('c'):
                cv.circle(img,int(((ix+x)/2,(iy+y)/2)),int(math.sqrt( ((ix-x)**2)+((iy-y)**2) )),(0,0,255),-1)
             elif k== ord('l'):
                cv.line(img,(ix,iy),(x,y),(255,0,0),5)
    elif event == cv.EVENT_LBUTTONUP:
        drawing = False
img = np.zeros((512,512,3), np.uint8)
cv.namedWindow('image')
cv.setMouseCallback('image',draw_circle)
while(1):
    cv.imshow('image',img)
    k = cv.waitKey(1) & 0xFF
    if k == 27:
    break
cv.destroyAllWindows()

错误：回溯（最近一次呼叫上次）： 文件“mouse.py”，第19行，在画圈中 等速圆（img，int（（ix+x）/2，（iy+y）/2）），int（数学sqrt（（ix-x）**2）+（iy-y）**2）），（0,0255），-1） TypeError:int（）参数必须是字符串、类似字节的对象或数字，而不是“tuple”

---

要使用OpenCV动态绘制圆

import numpy as np
import cv2
import math
drawing = False # true if mouse is pressed
ix,iy = -1,-1

# Create a function based on a CV2 Event (Left button click)
def draw_circle(event,x,y,flags,param):
    global ix,iy,drawing
    
    if event == cv2.EVENT_LBUTTONDOWN:
        drawing = True
        # we take note of where that mouse was located
        ix,iy = x,y
        
    elif event == cv2.EVENT_MOUSEMOVE:
        drawing == True
        
    elif event == cv2.EVENT_LBUTTONUP:
        radius = int(math.sqrt( ((ix-x)**2)+((iy-y)**2)))
        cv2.circle(img,(ix,iy),radius,(0,0,255), thickness=1)
        drawing = False

# Create a black image
img = np.zeros((512,512,3), np.uint8)

# This names the window so we can reference it
cv2.namedWindow('image')

# Connects the mouse button to our callback function
cv2.setMouseCallback('image',draw_circle)

while(1):
    cv2.imshow('image',img)

    # EXPLANATION FOR THIS LINE OF CODE:
    # https://stackoverflow.com/questions/35372700/whats-0xff-for-in-cv2-waitkey1/39201163
    k = cv2.waitKey(1) & 0xFF
    if k == 27:
        break
# Once script is done, its usually good practice to call this line
# It closes all windows (just in case you have multiple windows called)
cv2.destroyAllWindows()

试试（int（（ix+x）/2），int（（iy+y）/2））而不是int（（ix+x）/2，（iy+y）/2）），谢谢：）它奏效了。