Отрисовка контуров на изображении

import cv2
import numpy as np
 
def sl(x):
    pass
 
cv2.namedWindow('T', cv2.WINDOW_AUTOSIZE)
cv2.createTrackbar('g', 'T', 80, 255, sl)
cv2.createTrackbar('g2', 'T', 255, 255, sl)
# cv2.createTrackbar('r', 'T', 0, 255, sl)
# cv2.createTrackbar('r2', 'T', 255, 255, sl)
# cv2.createTrackbar('b', 'T', 0, 255, sl)
# cv2.createTrackbar('b2', 'T', 255, 255, sl)
 
image = cv2.imread('C:/brevna/pic/03.02.2022-01.34.23.jpg')
image = cv2.resize(image, (image.shape[1]//2, image.shape[0]//2))
 
image_gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
image_roi = image[10:350, 300:380]
 
 
 
while True:
 
    h = np.array((100, 100, 100), np.uint8)
    b = np.array((170, 170, 170), np.uint8)
    w = cv2.inRange(image_roi, h, b)
    g = cv2.getTrackbarPos('g', 'T')
    g2 = cv2.getTrackbarPos('g2', 'T')
    js = np.array((g), np.uint8)
    bj = np.array((g2), np.uint8)
    res = cv2.inRange(image_roi, js, bj)
    con, hier = cv2.findContours(res, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
    for icon in con:
        rect = cv2.minAreaRect(icon)
        area = int(rect[1][0] * rect[1][1])
        if area > 1500:
            box = cv2.boxPoints(rect)
            box = np.int0(box)
            cv2.drawContours(image, [box], -1, (0, 255, 0), 2)
            # image_rec = cv2.rectangle(image, (320, 350), (380, 50), (255, 10, 200), 2)
    cv2.imshow('res', res)
    cv2.imshow('w',w)
    cv2.imshow('image_roi', image_roi)
    cv2.imshow('original', image)
    if cv2.waitKey(33)& 0xFF == ord('q'):
        break
cv2.waitKey(0)
cv2.destroyAllWindows()