CODEWITHSUNDEEP
pythonopencv
Sahil
Sahil

Reputation: 1413

Haarcascades don't work in OpenCV

I am trying to do some face detection here and using the standard cascades, which can be found here, the following code should draw rectangles over eyes and the face, either the cascades aren't working at all or something's wrong with my code that's supposed to draw over the frame. Also would it be possible to grab the video feed and not have it inverted?

import numpy as np
import cv2

face_cascade = cv2.CascadeClassifier(r'A:\scripts\opencvstuff\haarcascade_frontalcatface.xml')
eye_cascade = cv2.CascadeClassifier(r'A:\scripts\opencvstuff\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) & 0xff
    if k == 27:
        break

cap.release()
cv2.destroyAllWindows()

Upvotes: 1

Views: 818

Answers (1)

Sahil
Sahil

Reputation: 1413

I was able to get the code to work by changing the Face model from haarcascade_frontalcatface.xml to haarcascade_frontalface_default. Seems dumb but yeah that worked.

Upvotes: 1

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