Authored by Monana
Contact me via serena9636@163.com
环境：Python2.7 OpenCV3.1.0 Win-64bit
我想在OpenCV中实现一段如下的很简单的人脸识别代码，这也是在网上能搜索到的多数的人脸识别代码。但是遇到了这样的问题。
import cv2
filename='input.jpg'
face_cascade=cv2.CascadeClassifier('D:/opencv/opencv/data/haarcascades/haarcascade_frontalface_default.xml')
img=cv2.imread(filename)
gray=cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
faces=face_cascade.detectMultiScale(gray,1.3,5)
for (x,y,h,w) in faces:
img=cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)
cv2.namedWindow('faces Detected!')
cv2.imshow('faces Detected!',img)
cv2.imwrite('faces.jpg',img)
cv2.waitKey(0)
报错
cv2.error: C:\builds\master_PackSlaveAddon-win64-vc12-static\opencv\modules\objdetect\src\cascadedetect.cpp:1639: error: (-215) !empty() in function cv::CascadeClas
