How can I use SIFT in opencv 2.4

Question

I want to use SIFT. I've already tried this code:

  import cv2
  import numpy as np
  img = cv2.imread('1.jpg')
  gray= cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
  sift = cv2.xfeatures2d.SIFT_create()
  kp = sift.detect(gray,None)
  img=cv2.drawKeypoints(gray,kp,img)
  cv2.imwrite('sift_keypoints.jpg',img)

But I get this error:

./sifttt.py: line 3: syntax error near unexpected token `('

./sifttt.py: line 3: `img = cv2.imread('1.jpg')'

I don't know if I need to install something or if I need to do something else?

The error w.r.t. the code doesn't make sense! Are you sure this is the code? — Rick M., Jul 27 '17 at 16:30
Run the code as `python sifttt.py`, to check that you are using the correct interpreter, just in case. — Imanol Luengo, Jul 27 '17 at 16:32
Your code works on my machine. No error. The SIFT points are detected properly. — Eskapp, Jul 27 '17 at 22:05

score 1 · Answer 1 · answered Jul 27 '17 at 22:09

1

There is a problem in your code at line number 5. You are using opencv 2.4 version but opencv 2.4 does not have xfeature2d module this module is found in openv 3 in up check this out. So to use Sift in opencv 2.4 use this and this tutorials.

answered Jul 27 '17 at 22:09

Yirga

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How can I use SIFT in opencv 2.4

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