CODEWITHSUNDEEP
pythonopencv
R.jzadeh
R.jzadeh

Reputation: 307

opencv 3 python feature detection error on function cv2.detectAndCompute and also on cv2.compute

i use opencv 3.0.0 and python 2.7.5_x32

This is my code (ORB_feature_detection):

import numpy as np
import cv2
from matplotlib import pyplot as plt

img1 = cv2.imread('C:\\Python27\\madar1.jpg',0)          # queryImage
img2 = cv2.imread('C:\\Python27\\madar2.jpg',0) # trainImage

# Initiate SIFT detector
orb = cv2.ORB_create()

# line 12
# find the keypoints and descriptors with SIFT
kp1, des1 = orb.detectAndCompute(img1,None)
kp2, des2 = orb.detectAndCompute(img2,None)

# create BFMatcher object

bf = cv2.BFMatcher(cv2.NORM_HAMMING, crossCheck=True)

# Match descriptors.
matches = bf.match(des1,des2)

# Sort them in the order of their distance.
matches = sorted(matches, key = lambda x:x.distance)

# Draw first 10 matches.
img3 = cv2.drawMatches(img1,kp1,img2,kp2,matches[:10], flags=2)

plt.imshow(img3),plt.show()

cv2.waitKey()
cv2.destroyAllWindows()

and this is the error message, the error message is on the kp1, des1 = orb.detectAndCompute(img1,None) part, i did work on opencv 2.4.11 and it doesn't work on opencv 3.0.0 !

    Traceback (most recent call last):
  File "C:\Python27\orb_matcher.py", line 12, in <module>
   kp1, des1 = orb.detectAndCompute(img1,None)
error: ..\..\..\modules\python\src2\cv2.cpp:163: error: (-215) The data should normally be NULL! in function NumpyAllocator::allocate

please help me, what should i do to make this work?

Upvotes: 8

Views: 7001

Answers (2)

lmiguelmh
lmiguelmh

Reputation: 3202

This is a known bug. You can find more information here https://github.com/opencv/opencv/issues/6081.

Today someone is fixing this issue: T-API python support implemented #6847.

Upvotes: 0

Amitku
Amitku

Reputation: 4704

You can try add this script after import cv2 and others cv2.ocl.setUseOpenCL(False) this solved my issue.

Upvotes: 5

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