opencv python 曲线拟合

以下是两种使用OpenCV进行曲线拟合的例子：

1. 最小外包圆形拟合：

import cv2 as cv
import numpy as np

image = cv.imread("huzi.jpeg")
cv.imshow("image", image)

gray = cv.cvtColor(image, cv.COLOR_BGR2GRAY)
ret, binary = cv.threshold(gray, 127, 255, cv.THRESH_BINARY)

contours, hierarchy = cv.findContours(binary, cv.RETR_LIST, cv.CHAIN_APPROX_SIMPLE)
(x, y), rad = cv.minEnclosingCircle(contours[0])

center = (int(x), int(y))
rad = int(rad)

cv.circle(image, center, rad, (255, 255, 255), 1)

cv.imshow("result", image)
cv.waitKey()
cv.destroyAllWindows()

2. 最小外包椭圆拟合：

import cv2 as cv
import numpy as np

image = cv.imread("huzi.jpeg")
cv.imshow("image", image)

gray = cv.cvtColor(image, cv.COLOR_BGR2GRAY)
ret, binary = cv.threshold(gray, 127, 255, cv.THRESH_BINARY)

contours, hierarchy = cv.findContours(binary, cv.RETR_LIST, cv.CHAIN_APPROX_SIMPLE)
ellipse = cv.fitEllipse(contours[0])

cv.ellipse(image, ellipse, (255, 255, 0), 1)

cv.imshow("result", image)
cv.waitKey()
cv.destroyAllWindows()