check.py

import cv2

(width, height) = (130, 100)

# url = '<YOUR IP ADDRESS>/video'
# cap=cv2.VideoCapture(url)


cap=cv2.VideoCapture(0)

while (cap.isOpened()):
    ret, img = cap.read()
    img=cv2.flip(img, 1)
    cv2.rectangle(img, (20, 20), (250, 250), (255, 0, 0), 3)
    cv2.imshow("RGB Output", img)
    img1 = img[20:250,20:250]       
    imCopy = img1.copy()
    gray = cv2.cvtColor(img1, cv2.COLOR_BGR2GRAY)
    blur = cv2.GaussianBlur(gray, (5, 5), 0)
    ret, thresh1 = cv2.threshold(blur, 10, 255, cv2.THRESH_BINARY_INV + cv2.THRESH_OTSU)
    hand_resize = cv2.resize(thresh1, (width, height))
    cv2.imshow("Threshold", thresh1)
    contours, hierarchy = cv2.findContours(thresh1, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
    cv2.drawContours(imCopy, contours, -1, (0, 255, 0))
    cv2.imshow('Draw Contours', imCopy)

    k = 0xFF & cv2.waitKey(10)
    if k == 27:
        break

cap.release()
cv2.destroyAllWindows()