人体轮廓特征—运动历史图—python实现

具体内容用的时候再看，目前先做个标记

import numpy as np
import cv2 
from time import sleep 
import queue
class MHI:
    def __init__(self,cap,tau,delta,xi,t):
        self.tau=tau
        self.delta=delta
        self.xi=xi
        self.t=t
        self.cap=cap
        self.data = queue.Queue()
        ret,frame=cap.read()
        if ret:
            for i in range(t):
                self.data.put(frame)
        self.H = np.zeros(frame.shape)    
    def getimag(self):        
        ret,frame=cap.read()
        if not ret:
            return ret,frame
        self.data.put(frame)
        old_frame=self.data.get()        
        a=cv2.addWeighted(old_frame.astype(float),1, frame.astype(float), -1, 0)
        D= np.fabs(a)
        Psi= D >=self.xi        
        c=self.H-self.delta
        H=np.maximum(0,c)        
        H[Psi]=self.tau
        self.H=H
        return ret, H.astype("uint8")
 
cap = cv2.VideoCapture(0) # 
a=MHI(cap,tau=200,xi=20,delta=10,t=1)
while cap.isOpened():
    _,frame=a.getimag()
    cv2.imshow("out_win", frame)
    sleep(0.04)
    if cv2.waitKey(1) == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()