How to check for openCV on Ubuntu 9.10 - linux

Question

How can I confirm if openCV is properly installed in my computer ? Is there any quick command line for it ? I am on Ubuntu 9.10

Answer 1

A proper answer to my own question !
pkg-config --modversion opencv

Answer 2

With OpenCV 2.4.x:
You can use "CV_VERSION" or "CV_MAJOR_VERSION", "CV_MINOR_VERSION", "CV_SUBMINOR_VERSION" from a C/C++ simple program.
Example of 'main.c':
#include <stdio.h>
#include <cv.h>
int main(void)
{
printf("%s\r\n", CV_VERSION);
printf("%u.%u.%u\r\n", CV_MAJOR_VERSION, CV_MINOR_VERSION, CV_SUBMINOR_VERSION);
}
Here is the compilation line:
g++ `pkg-config --cflags opencv` main.c `pkg-config --libs opencv` -o main

Answer 3

Here's an easy way to check. Assuming you installed using the default configuration.
In /usr/local/lib you should have the following libraries
libcvaux.so -> libcvaux.so.2.0
libcvaux.so.2.0 -> libcvaux.so.2.0.0
libcvaux.so.2.0.0
libcv.so -> libcv.so.2.0
libcv.so.2.0 -> libcv.so.2.0.0
libcv.so.2.0.0
libcxcore.so -> libcxcore.so.2.0
libcxcore.so.2.0 -> libcxcore.so.2.0.0
libcxcore.so.2.0.0
libhighgui.so -> libhighgui.so.2.0
libhighgui.so.2.0 -> libhighgui.so.2.0.0
libhighgui.so.2.0.0
libml.so -> libml.so.2.0
libml.so.2.0 -> libml.so.2.0.0
libml.so.2.0.0
And in /usr/local/include/opencv you should have the following header files.
cvaux.h, cvcompat.h, cv.hpp, cvver.h, cvwimage.h, cxcore.hpp, cxflann.h,
cxmisc.h, cxtypes.h, highgui.hpp, cvaux.hpp, cv.h, cvtypes.h, cvvidsurv.hpp,
cxcore.h, cxerror.h, cxmat.hpp, cxoperations.hpp, highgui.h, ml.h
I'm assuming that you using the latest version which is 2.0.

Answer 4

Here is c++ version
// https://www.solarianprogrammer.com/2014/04/21/opencv-beaglebone- black-ubuntu/
// Test to check the OpenCV version
// Build on Linux with:
// g++ test_1.cpp -o test_1 -lopencv_core
#include <opencv2/opencv.hpp>
#include <iostream>
int main() {
std::cout << "Hello, OpenCV version "<< CV_VERSION << std::endl;
return 0;
}

Answer 5

Open your terminal and type this command:
python3 -c "import cv2; print(cv2.__version__)"
This works on my system

Answer 6

I found this to be the simplest way:
/usr/bin/opencv_version

Answer 7

You could use dpkg.
$ dpkg -l | grep libopencv
Or if you use python version:
$ python
>>>> import cv2