Ubuntu下python之opencv猫脸检测

# -*- coding=utf-8 -*-
import cv2
faceCascade = cv2.CascadeClassifier("haarcascade_frontalcatface.xml")#官网提供的github中data下相关分类器
img = cv2.imread("cat.jpg")  
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
faces = faceCascade.detectMultiScale(
    gray,
    scaleFactor= 1.02,
    minNeighbors=3,
    minSize=(50, 50),
    flags=cv2.CASCADE_SCALE_IMAGE
)
index = 0
for (x, y, w, h) in faces:
    index += 1
    cv2.rectangle(img, (x, y), (x+w, y+h), (0, 0, 255), 2)
    cv2.putText(img,'cat#'+str(index),(x,y-7), 1, 1.0, (0, 255, 0), 1, cv2.LINE_AA)
cv2.imshow('cat', img)
#cv2.imwrite("cat_out.jpg",img)
cv2.waitKey(0)
cv2.destroyAllWindows()   

结果：