testMove.py

# coding=utf-8
# 2021.4.2

from cv2 import cv2

first_frame = None
video = cv2.VideoCapture(0)

while True:
    check, frame = video.read()
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    gray = cv2.GaussianBlur(gray, (21,21), 0)

    if first_frame is None:
        first_frame = gray
        continue
    # ji suan di yi zhen he qi ta zhen de bu tong
    delta_frame = cv2.absdiff(first_frame, gray)
    # xiang su cha yi chao guo 30 de biao ji wei bai se, shao yu 30 biao ji wei hei se
    thresh_delta = cv2.threshold(delta_frame, 30, 255, cv2.THRESH_BINARY)[1]
    thresh_delta = cv2.dilate(thresh_delta, None, iterations=0)
    # ding yi contour(lunkuo), hui zhi bian kuang
    (cnts,_) = cv2.findContours(thresh_delta.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
    # yi chu zao yin
    for contour in cnts:
        if cv2.contourArea(contour) < 1000:
            continue
        (x,y,w,h) = cv2.boundingRect(contour)
        cv2.rectangle(frame, (x,y), (x+w, y+h), (0,255,0), 3)

    # show
    cv2.imshow('frame', frame)
    cv2.imshow('capturing', gray)
    cv2.imshow('delta', delta_frame)
    cv2.imshow('thresh', thresh_delta)
    key = cv2.waitKey(1)

    if key == ord('q'):
        break
    
video.release()
cv2.destroyAllWindows()