Обводка объекта точками в OpenCV

import cv2 as cv
import numpy as np
from google.colab.patches import cv2_imshow
 
import numpy as np
import cv2 as cv
im = cv.imread('1.jpg')
imgray = cv.cvtColor(im, cv.COLOR_BGR2GRAY)
ret, thresh = cv.threshold(imgray, 127, 255, 0)
contours, hierarchy = cv.findContours(thresh, cv.RETR_TREE, cv.CHAIN_APPROX_SIMPLE)
cv2_imshow(im)

import cv2
import numpy as np
import matplotlib
 
def viewImage(image):
 cv2.namedWindow('Display', cv2.WINDOW_NORMAL)
 cv2.imshow('Display', image)
 cv2.waitKey(0)
 cv2.destroyAllWindows()
 
 
image = cv2.imread('name.jpg')
hsv_img = cv2.cvtColor(image, cv2.COLOR_BGR2HSV)
blue_low = np.array([100,150,0] )
blue_high = np.array([140,255,255])
curr_mask = cv2.inRange(hsv_img, blue_low, blue_high)
hsv_img[curr_mask > 0] = ([140,255,250])
RGB_again = cv2.cvtColor(hsv_img, cv2.COLOR_HSV2RGB)
gray = cv2.cvtColor(RGB_again, cv2.COLOR_RGB2GRAY)
ret, threshold = cv2.threshold(gray, 90, 255, 0)
 
contours, hierarchy = cv2.findContours(threshold,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)
cv2.drawContours(image, contours, -1, (0, 0, 255), 3)
viewImage(image)