python+opencv实现动态物体追踪

简单几行就可以实现对动态物体的追踪，足见opencv在图像处理上的强大。

python代码：

import cv2
import numpy as np
camera=cv2.VideoCapture(0)
firstframe=None
while True:
  ret,frame = camera.read()
  if not ret:
    break
  gray=cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
  gray=cv2.GaussianBlur(gray,(21,21),0)
  if firstframe is None:
    firstframe=gray
    continue

  frameDelta = cv2.absdiff(firstframe,gray)
  thresh = cv2.threshold(frameDelta, 25, 255, cv2.THRESH_BINARY)[1]
  thresh = cv2.dilate(thresh, None, iterations=2)
  # cnts= cv2.findContours(thresh.copy(),cv2.RETR_EXTERNAL,cv2.CHAIN_APPROX_SIMPLE)

  x,y,w,h=cv2.boundingRect(thresh)
  frame=cv2.rectangle(frame,(x,y),(x+w,y+h),(0,0,255),2)
  cv2.imshow("frame", frame)
  cv2.imshow("Thresh", thresh)
  cv2.imshow("frame2", frameDelta)
  key = cv2.waitKey(1)&0xFF

  if key == ord("q"):
    break

camera.release()
cv2.destroyAllWindows()

效果图

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

原文链接：http://blog.csdn.net/cike14/article/details/50649811