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part3.py
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#coding=utf-8
import cv2
import numpy as np
frame=cv2.imread('123.jpg',-1)
cv2.imshow('image',frame)
#BGR模式转换成HSV模式
img=cv2.cvtColor(frame,cv2.COLOR_BGR2HSV)
#--------识别颜色
#红色
mask1=cv2.inRange(img,np.array([0,43,46]),np.array([10,255,255]))
#橙色
mask2=cv2.inRange(img,np.array([11,43,46]),np.array([25,255,255]))
#黄色
mask3=cv2.inRange(img,np.array([26,43,46]),np.array([34,255,255]))
#白色
mask4=cv2.inRange(img,np.array([0,0,221]),np.array([180,30,255]))
mask=mask1+mask2+mask3+mask4
#转回彩色
res=cv2.bitwise_and(frame,frame,mask=mask)
#转成灰度
res=cv2.cvtColor(res,cv2.COLOR_BGR2GRAY)
#二值化
ret,res = cv2.threshold(res,0,255,cv2.THRESH_BINARY)
#人体颜色占比,占比越大,踢被子趋势越明显
num=cv2.countNonZero(res)/float(res.size)
print num
cv2.imshow('image',res)
if cv2.waitKey(0):cv2.destroyAllWindows()