python帧差法

适合局域网花屏屏蔽，摄像头不动的运动检测，pc上5ms以内，经常是2ms

不能物体移开。

  

   

    

     

    
    

     

      import time
     
    
   

    

     

    
    

     

      import numpy as np
     
    
   

    

     

    
    

     

      import cv2
     
    
   

    

     

    
    

     

      def absdiff_demo(image_1, image_2, sThre):
     
    
   

    

     

    
    

     

       gray_image_1 = cv2.cvtColor(image_1, cv2.COLOR_BGR2GRAY)  # 灰度化
     
    
   

    

     

    
    

     

       gray_image_1 = cv2.GaussianBlur(gray_image_1, (5, 5), 0)  # 高斯滤波
     
    
   

    

     

    
    

     

       gray_image_2 = cv2.cvtColor(image_2, cv2.COLOR_BGR2GRAY)
     
    
   

    

     

    
    

     

       gray_image_2 = cv2.GaussianBlur(gray_image_2, (5, 5), 0)
     
    
   

    

     

    
    

     

       d_frame = cv2.absdiff(gray_image_1, gray_image_2)
     
    
   

    

     

    
    

     

       ret, d_frame = cv2.threshold(d_frame, sThre, 255, cv2.THRESH_BINARY)
     
    
   

    

     

    
    

     
 return d_frame
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      capture = cv2.VideoCapture(0)
     
    
   

    

     

    
    

     

      sThre = 10  # sThre表示像素阈值
     
    
   

    

     

    
    

     

      i = 0
     
    
   

    

     

    
    

     

      while (True):
     
    
   

    

     

    
    

     

       ret, frame = capture.read()
     
    
   

    

     

    
    

     
 if i == 0:
     
    
   

    

     

    
    

     

       cv2.waitKey(1)
     
    
   

    

     

    
    

     

       i = i + 1
     
    
   

    

     

    
    

     

       ret_2, frame_2 = capture.read()
     
    
   

    

     

    
    

     

       start=time.time()
     
    
   

    

     

    
    

     

       segMap = absdiff_demo(frame, frame_2, sThre)
     
    
   

    

     

    
    

     
 if time.time()-start>0.01:
     
    
  
 

文章来源: blog.csdn.net，作者：网奇，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/jacke121/article/details/95447206