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Demo Failure : Cannot detect face .Why?

asked 2016-12-24 19:32:46 -0500

kudou gravatar image

updated 2016-12-25 05:33:33 -0500

berak gravatar image

This is the result: image description

You can see there is no detect rectangle. Where is wrong?

Thanks!

Below is my codes:

import numpy as np
import cv2
face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')
img = cv2.imread('./nbaplayer/203500.png')
print img.shape
print img.size
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
#print gray.shape
#print gray.size
#cv2.imshow('img1',gray)
cv2.imshow('hsv',hsv)
faces = face_cascade.detectMultiScale(gray,2,1)
print faces
for (x,y,w,h) in faces:
 img = 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.rectangle(img,(38,0),(23,128),(255,255,255),3)
cv2.imshow('img',img)
cv2.waitKey(0)
cv2.destroyAllWindows()
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Comments

would you be so nice, to replace your screenshot with a text version of it ?

berak gravatar imageberak ( 2016-12-25 00:08:24 -0500 )edit

Ok, I had tried, but I found I must copy codes one line by one line.

kudou gravatar imagekudou ( 2016-12-25 05:25:56 -0500 )edit

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answered 2016-12-25 05:37:11 -0500

berak gravatar image

most likely, your cascades were not loaded.

try an absolute path, like:

face_cascade = cv2.CascadeClassifier('/complete/path/to/haarcascade_frontalface_default.xml')

also please check the result of it:

face_cascade.empty()
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Yeah! Nothing I can say more than thanks~~~~~~~~ But why must I use absolute path? Cos I do as tutorial, it doesn't use it.

kudou gravatar imagekudou ( 2016-12-25 06:50:38 -0500 )edit
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Asked: 2016-12-24 19:32:46 -0500

Seen: 464 times

Last updated: Dec 25 '16