有色物体检测opencv+python

import cv2
import numpy as np
import matplotlib.pyplot as plt
cap=cv2.VideoCapture(0)
while(1):
    ret,frame=cap.read() 
    hsv=cv2.cvtColor(frame,cv2.COLOR_BGR2HSV)
    lower_blue=np.array([110,50,50])
    upper_blue=np.array([130,255,255])
    #根据阈值构建掩模
    mask=cv2.inRange(hsv,lower_blue,upper_blue)
    #对图像和掩模进行位运算
    res=cv2.bitwise_and(frame,frame,mask=mask)
    cv2.imshow('iframe',frame)
    cv2.imshow('mask',mask)
    cv2.imshow('res',res)
    k=cv2.waitKey(1)&0xFF
    if k==27:
        break
        cv2.destroyAllWindows()