图像中内容使用滑动条进行等比缩放

Question

问题遇到的现象和发生背景

图像中绿色的框是用cv2.line画的， 然后需要将绿色框框， 通过滑动条来进行等比缩放。

问题相关代码，请勿粘贴截图

import cv2
import numpy as np

def empty():

pass

cv2.namedWindow('TrackBars')

cv2.resizeWindow('TrackBars', 150, 200)

cv2.createTrackbar('Hue min', 'TrackBars', 0, 255, empty())

img = np.zeros((856, 936, 3), np.uint8)

img = cv2.imread('C:/Users/Administrator/Desktop/xiangmu/test_dis/img/quanxi1.jpg')

size = img.shape

print(size)

左

img = cv2.line(img, (182, 250), (168, 258), (123, 231, 0), 2) # 颜色自己可以定义
img = cv2.line(img, (168, 258), (155, 270), (123, 231, 0), 2)
img = cv2.line(img, (155, 270), (135, 300), (123, 231, 0), 2)
img = cv2.line(img, (135, 300), (120, 330), (123, 231, 0), 2)
img = cv2.line(img, (120, 330), (113, 350), (123, 231, 0), 2)
img = cv2.line(img, (113, 350), (113, 570), (123, 231, 0), 2)
img = cv2.line(img, (113, 570), (125, 590), (123, 231, 0), 2)

右

img = cv2.line(img, (182, 250), (198, 258), (123, 231, 0), 2)
img = cv2.line(img, (198, 258), (212, 270), (123, 231, 0), 2)
img = cv2.line(img, (212, 270), (232, 300), (123, 231, 0), 2)
img = cv2.line(img, (232, 300), (247, 330), (123, 231, 0), 2)
img = cv2.line(img, (247, 330), (254, 350), (123, 231, 0), 2)
img = cv2.line(img, (254, 350), (254, 570), (123, 231, 0), 2)
img = cv2.line(img, (254, 570), (242, 590), (123, 231, 0), 2)

尾部

img = cv2.line(img, (125, 590), (242, 590), (123, 231, 0), 2)

cv2.imshow('quanxi', img)

cv2.imwrite('./img/anquan.jpg', img)

cv2.waitKey(0)
cv2.destroyAllWindows()

运行结果及报错内容

我的解答思路和尝试过的方法

我想要达到的结果