sift = cv2.xfeatures2d.SIFT_create() not working even though have contrib installed

Asked 13/9, 2018 at 1:52 Answered 15/6, 2023 at 7:0

So I am trying to use:

sift = cv2.xfeatures2d.SIFT_create()

and it is coming up with this error:

cv2.error: OpenCV(3.4.3) C:\projects\opencv-python\opencv_contrib\modules\xfeatures2d\src\sift.cpp:1207: error: (-213:The function/feature is not implemented) 
This algorithm is patented and is excluded in this configuration; Set OPENCV_ENABLE_NONFREE CMake 
option and rebuild the library in function 'cv::xfeatures2d::SIFT::create'

I am using Python 3.5.0 and opencv(3.4.3) and I am just using idle. This occured after I tried to install TensorFlow and I have tried looking around and have installed opencv-contrib-python but I am still getting the same error. Thank you in advance and I apologise if I have not included enough info

Elamitic answered 13/9, 2018 at 1:52 Comment(0)

156

I had the same problem. It seems that SIRF and SURF are no longer available in opencv > 3.4.2.16. I chose an older opencv-python and opencv-contrib-python versions and solved this problem. Here is the history version about opencv-python, and I use the following code :

pip install opencv-python==3.4.2.16
pip install opencv-contrib-python==3.4.2.16

Edit

For Anaconda User just this instead of pip

conda install -c menpo opencv

this will install cv2 3.4.1 and everything you need to run SIFT

Fabric answered 26/9, 2018 at 9:13 Comment(12)

This is not working with Python 3.7. I tried with version 3.4.2.16, and I am getting DLL not found error. Base OpenCV is working with version 3.4.5.20 – Fetishist 10/2, 2019 at 14:5

@NithishV did you find solution fot that? im using v3.7 and having this issue. – Mcalpin 25/2, 2019 at 15:44

@DragonKnight, I am able to get it working with opencv-contrib-python version 3.4.5.20 only. Install it using "pip install opencv-contrib-python==3.4.5.20" – Fetishist 26/2, 2019 at 11:1

Quite tricky solution! Seemingly, it only works with a particular version! For the 3.4.2.16 version, I guess the OPENCV_ENABLE_NONFREE is turned on; when I install other version like 4.1.x.x, it will report a error like

OpenCV(4.1.0) This algorithm is patented and is excluded in this configuration; Set OPENCV_ENABLE_NONFREE CMake option and rebuild the library in function 'cv::xfeatures2d::SIFT::create'

– Steffi 3/5, 2019 at 13:59

OpenCV stopped including non-free/patented algorithms like SIFT and SURF as of v3.4.3. So either stick with v3.4.2.17, or compile the latest version from source if you need it. – Amboise 14/5, 2019 at 3:0

Why is this the solution? I don' get python, it's weird. – Bucaramanga 23/8, 2019 at 14:8

It is one of the working solutions (for both python terminal and anaconda environment, both works) I found in the internet. It is Nov 2019, and this still works. Thank you for the simple solution. – Acentric 18/11, 2019 at 9:45

I managed to install the [non conda] solution on Python 3.5, but not on 3.8. seems to work fine. – Toadeater 30/5, 2020 at 14:29

Works with python 3.6.9. – Indivisible 11/11, 2020 at 0:30

Not worked for me in Google Colab .it says python version 3.4.2.16 is not available – Gamages 8/6, 2021 at 6:36

pip install opencv-python==3.4.2.16 doesn't work. "This release has been yanked" says in OpenCV version history, and videos/articles on how to build from source? Thanks in advance everyone. – Zebada 11/3, 2022 at 15:5

Why downgrading the whole module when you can get the same feature by simply doing sift = cv2.SIFT_create() ? – Propraetor 6/8, 2023 at 18:11

Since SIFT patent expired, SIFT has been moved to the main repo.

To use SIFT in Opencv, You should use

cv2.SIFT_create()

instead of

cv2.xfeatures2d.SIFT_create()

xfeatures2d only exists in the contrib package, but sift is part of the main package now.

This link will be helpful.

Javelin answered 11/8, 2021 at 6:19 Comment(1)

The SIFT patent expired 6th March, 2020. patents.google.com/patent/US6711293 – Marcellemarcellina 25/4, 2022 at 0:18

Edit: The opencv-contrib-python-nonfree was removed from pypi.

On Linux/ MacOS, I've found a better solution! To access nonfree detectors use: pip install opencv-contrib-python-nonfree

Cardiff answered 2/5, 2020 at 10:4 Comment(4)

Could not find a version that satisfies the requirement opencv-contrib-python-nonfree (from versions: ) No matching distribution found for opencv-contrib-python-nonfree – Johppa 2/6, 2020 at 21:3

@Gulzar, I had this issue too. Possible reasons are: 1. Your OS is Windows; 2. You are using Python 3.8. According to this page: pypi.org/project/opencv-contrib-python-nonfree Windows support is canceled and python 3.8 is not supported (possibly yet). I didn't found any solution to this problem, but on my other computers (Linux and MacOS), everything is fine. – Cardiff 3/6, 2020 at 6:59

@Cardiff What Python version do you use? – Geodesy 14/7, 2020 at 11:42

@RoiMulia, I use Python 3.6 – Cardiff 14/7, 2020 at 13:46

It may be due to a mismatch of opencv version and opencv-contrib version. If you installed opencv from the source using CMake, and the source version is different from the version of opencv-contrib-python, uninstall the current opencv-contrib-python and do pip install opencv-contrib-python==<version of the source>.X or an another compatible version. One version setup that I have running is opencv source (3.2), opencv-python (3.4.0.14) and opencv-contrib-python (3.4.2.17)

Twittery answered 13/9, 2018 at 8:24 Comment(5)

The request for info should make into the comments section of the question. You could edit your answer and leave just the workaround/solution. – Irate 13/9, 2018 at 8:41

Thank you for the comment. Both my opencv-python and opencv-contrib-python version is 3.4.3.18. I assume these would be compatible? – Elamitic 15/9, 2018 at 12:17

I am guessing you installed them with pip install. Have you done another opencv installation, more specifically have you also installed opencv from the source ? If yes, what is the version of the sources ? I have installed the same version of opencv-python, opencv-contrib-python as you but with my 3.2 source installation and I get the same error msg. I would say an easy and lazy hack would be to uninstall opencv-python and opencv-contrib-python and reinstall with the same versions as me and give it a try. – Twittery 15/9, 2018 at 16:46

still giving me this error :error: OpenCV(4.2.0) /io/opencv_contrib/modules/xfeatures2d/src/sift.cpp:1210: error: (-213:The function/feature is not implemented) This algorithm is patented and is excluded in this configuration; Set OPENCV_ENABLE_NONFREE CMake option and rebuild the library in function 'create' – Middleclass 13/3, 2020 at 16:35

According to the error msg, you are using opencv-python==4.2.0 Did you also install opencv-contrib-python by running pip3 install opencv-contrib-python==4.2.0? – Twittery 17/3, 2020 at 13:26

I've been into this problem for many hours and finally I've solved it, and I'll share with you (and for any body else) how to solve it.

Here are the steps:

1- Download CMAKE from the official website.

2- Download Visual Studio

3- Download OpenCV Sources.zip files.

4- Download OpenCV-contrib from github.

First, we'll create a directory and name it 'OpenCV', this directory will contain the 'opencv-x.x.x' and 'opencv_contrib-x.x.x' downloaded extracted files.
We'll also create a 'build' directory that will contain the new OpenCV build files.

The next step is to run the CMake (cmake-gui) app.

You should then
1. locate the 'opencv-x.x.x' extracted folder in the directory we created 'OpenCV'.
2. do the same for the 'build' folder.

After doing that, click on 'Configure'

A popup window should appear, choose the suitable configurations
Wait for the progress bar to finish.

Check the OPENCV_ENABLE_NONFREE, then click 'Configure' again and wait for the progress bar.

After it is done loading, click 'Generate', right next to 'Configure' button.
Congrats, you've done the first steps!

Okay, close the CMAKE (cmake-gui) app and go to the 'build' directory we created.
locate 'OpenCV.sln' and run it using Visual Studio.
Change vs build mode from 'Debug' to 'Release'.
On the right 'Solution Explorer' menu, locate 'CMakeTargets' >> 'ALL_BUILD', right click it and select 'Build'
Wait for it to build (it may take 5+ minutes)
Again, on the right 'Solution Explorer' menu, locate 'CMakeTargets' >> 'INSTALL', right click it and select 'Build'

After it finishes loading, you can then use it, that's all!

Extra:

You can freely uninstall any pre-installations of 'opencv-python' and 'opencv-contrib-python' via the the pip

    pip uninstall opencv-python
    pip uninstall opencv-contrib-python

Reboot your device.
Test OpenCV. Open a terminal and type

    $ python
    >>> import cv2
    >>> cv2.__version__

Hope this helps, thank you!

Chockfull answered 17/4, 2023 at 2:30 Comment(0)

I use OpenCV version 4.7 and this works for me:

cv2.SIFT_create()

the xfeatures2d.SIFT_create() method was removed because of some patent issues and is available in the short form as above.

Gouty answered 15/6, 2023 at 7:0 Comment(0)

You can try if python version is latest.

pip install opencv-contrib-python==4.4.0.46

Gynecology answered 6/4, 2023 at 3:2 Comment(0)

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