python的cv2的交互式曲线绘制代码

好的，以下是一个使用 OpenCV（cv2）库实现的交互式曲线绘制代码，您可以参考一下：

import cv2
import numpy as np

# 定义画布大小
img = np.zeros((512, 512, 3), np.uint8)

# 定义初始点
drawing = False
ix, iy = -1, -1

# 定义回调函数
def draw(event, x, y, flags, param):
    global ix, iy, drawing
    if event == cv2.EVENT_LBUTTONDOWN:
        drawing = True
        ix, iy = x, y
    elif event == cv2.EVENT_MOUSEMOVE:
        if drawing == True:
            cv2.line(img, (ix, iy), (x, y), (0, 255, 0), thickness=2)
            ix, iy = x, y
    elif event == cv2.EVENT_LBUTTONUP:
        drawing = False
        cv2.line(img, (ix, iy), (x, y), (0, 255, 0), thickness=2)

# 定义窗口和回调函数
cv2.namedWindow('image')
cv2.setMouseCallback('image', draw)

# 循环显示画布
while True:
    cv2.imshow('image', img)
    if cv2.waitKey(1) & 0xFF == 27:
        break

cv2.destroyAllWindows()

运行代码后，会弹出一个画布窗口，您可以使用鼠标在画布上绘制曲线。按下 Esc 键可退出程序。