include nonfree openCV 2.4.10 on ubuntu

Question

I've installed OpenCV on ubuntu using this link and I'm trying to use SURF descriptor. I knew that they changed the location of these type of descriptors to the nonfree module so we need to include it, which is something like this: #include "opencv2/nonfree/features2d.hpp". The problem is that I'm getting this error at compile time: opencv2/nonfree/features2d.hpp no such file or directory.

Any idea how to fix it?

EDITED: The other parts of openCV are working fine. I'm including the following libraries and everything is looking good:

#include "opencv2/core/core.hpp"
#include "opencv2/features2d/features2d.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/calib3d/calib3d.hpp"
#include "opencv2/legacy/legacy.hpp"

I checked the inlcude folder in my OpenCV directory and the nonfree folder is there. Moreover, it's the only library that I can't access within QTCreator (The environment I'm using) because I tried to include all the other librairies found in the Inlcude folder and they looked good.

EDITED2: You can see a screenshot of what I saw when I ran make VERBOSE=1 on this link

So not sure where to look? Actually, I did not find the nonfree folder in ../usr/include/opencv2/

Thanks.

Run make with `VERBOSE=1" and check whether the right directory is passed. — usr1234567, Dec 15 '14 at 10:33
You should find the path in the command invoking the compiler after a `-I`. If the path after the -I together with opencv2/nonfree/features2d.hpp is a valid header, it should work. If this is not the case, copy the part invoking the compiler and add the right -I with the path. If that works, try to add the include path in your CMake appropriately. — usr1234567, Dec 15 '14 at 11:01
@usr1234567 actually I did not understand exactly what you mean. Can u please clarify? — Maystro, Dec 15 '14 at 12:17
if you installed opencv via some ppm, they might have removed the 'nonfree' module. you probably have to build from github src then. — berak, Dec 15 '14 at 17:33

score 42 · Accepted Answer · answered Dec 15 '14 at 21:37

42

Actually, I just updated openCV using the following commands then it worked:

sudo add-apt-repository --yes ppa:xqms/opencv-nonfree
sudo apt-get update 
sudo apt-get install libopencv-nonfree-dev

answered Dec 15 '14 at 21:37

Maystro

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The repository doesn't exist any more: `Failed to fetch http://ppa.launchpad.net/xqms/opencv-nonfree/ubuntu/dists/vivid/main/binary-amd64/Packages 404 Not Found`. – AxeEffect May 23 '15 at 17:38
Still works for m2. AxeEffect please confirm or remove your comment – Paulo Neves Jul 22 '17 at 15:45
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@PauloNeves Repository doesn't exist anymore. Doesn't work for me – Nubcake Mar 17 '18 at 23:09
This repository working on Ubuntu 16, but not on Ubuntu 14 – Geograph Jul 07 '18 at 11:26

score 10 · Answer 2 · edited Mar 02 '16 at 06:35

10

sudo add-apt-repository --yes ppa:xqms/opencv-nonfree
sudo apt-get update
sudo apt-get install libopencv-nonfree-dev

---this answer works well for me, thanks @Maystro

after this step, just link your program to -lopencv_nonfree, or you cannot access to surf.

edited Mar 02 '16 at 06:35

ebin

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answered Jun 28 '15 at 08:53

Xiongmin LIN

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How to link program to -lopencv_nonfree? – Slick Slime May 09 '20 at 15:41

score 0 · Answer 3 · answered Jan 13 '20 at 07:56

This worked for me:

sudo add-apt-repository --remove ppa:xqms/opencv-nonfree
sudo add-apt-repository --yes ppa:jeff250/opencv
sudo apt-get update
sudo apt-get install libopencv-dev
sudo apt-get install libopencv-nonfree-dev

Here's where I found it:

https://askubuntu.com/a/1141214/689474

include nonfree openCV 2.4.10 on ubuntu

3 Answers3

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