24_Find_and _Draw_contours.py

import cv2
import numpy as np

cap = cv2.VideoCapture(0)

while (cap.isOpened()):
    ret, frame = cap.read()
    if ret:
        blurred_frame = cv2.GaussianBlur(frame, (5, 5), 0)
        hsv = cv2.cvtColor(blurred_frame, cv2.COLOR_BGR2HSV)

        lower_blue = np.array([38, 86, 0])
        upper_blue = np.array([121, 255, 255])
        mask = cv2.inRange(hsv, lower_blue, upper_blue)

        contours, _ = cv2.findContours(
            mask, cv2.RETR_TREE, cv2.CHAIN_APPROX_NONE)

        for contour in contours:
            cv2.drawContours(frame, contour, -1, (0, 255, 0), 0)

    cv2.imshow('Frame', frame)
    cv2.imshow('Mask', mask)
    key = cv2.waitKey(1) & 0xFF
    if key == 27:
        break

cap.release()
cv2.destroyAllWindows()