Open cv face recognition python
<p>I started learning some object recognition and I'm interested in <code>openCV</code>. First of all, I tried the tutorial where your face is recognized. I installed numPy and <code>openCV</code>. When I tried running the program below, I received this error: </p>

<blockquote>
  <p>File "path to my program\camera.py", line 4, in 
      face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
  cv2.error:
  D:\Build\OpenCV\opencv-3.1.0\modules\core\src\persistence.cpp:2220:
  error: (-212) haarcascade_frontalface_default.xml(1): Valid XML should
  start with '' in function icvXMLParse</p>
</blockquote>

<p>I was trying to find the answer to this question everywhere but I failed. I found a lot of other people had this problem, but the solutions didn't work. I tried re-installing python, installing a different <code>openCV</code> etc.</p>

<p>My code is here: </p>

<pre><code>import numpy as np
import cv2

face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')

eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')

cap = cv2.VideoCapture(0)

while 1:
    ret, img = cap.read()
    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
    faces = face_cascade.detectMultiScale(gray, 1.3, 5)

    for (x,y,w,h) in faces:
        cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)
        roi_gray = gray[y:y+h, x:x+w]
        roi_color = img[y:y+h, x:x+w]

        eyes = eye_cascade.detectMultiScale(roi_gray)
        for (ex,ey,ew,eh) in eyes:
            cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh),(0,255,0),2)

    cv2.imshow('img',img)
    k = cv2.waitKey(30) &amp; 0xff
    if k == 27:
        break

cap.release()
cv2.destroyAllWindows()
</code></pre>

<p>I will be grateful for any help.</p>

<p>P.S.: My <code>xml</code> program starts with <code>&lt;?xml...?&gt;</code></p>

<p>Problem solved by re-downloading xml-files. Simple as that, but it takes me a long time to figure.</p>

python xml opencv face-recognition