I am trying to use codeblocks to compile the code available here
The thing is every time I try to build and run, I run into the following error:
|/.../head_pose_estimation/opencv2/core/core.hpp|48|fatal error: opencv2/core.hpp: No such file or directory
Does anyone know how I can fix this? Thank you!
You do not have the pre-built (compiled) version of OpenCV, what you currently have are the source files. If you want to do something special with OpenCV (Target/GPU SUpport etc) then you will need to build the framework using an appropriate guide.
If however you simply want to use OpenCV in the most common way then download the pre-built libraries from the OpenCV.org website.
NOTE:
If you are using OpenCV with MinGW compiler, I do not remember if the pre-built is actually pre-built for MinGW. (I dont think they do) In this case you will HAVE to built the libraries. You can find a guide here
Related
I installed boost using brew install boost in order to use odeint library (the odeint webpage says : odeint is a header-only library, no linking against pre-compiled code is required).
I am on Mac Yosemite 10.10.5 . Now when I cd to /usr/local/include, I can see boost directory there. Inside boost (/usr/local/include/boost) there are all the header files I needed for my project, along with the numeric/odeint directories needed for my specific purposes. At the same time, when I cd to usr\local\lib, I can see a lot of libboost_* .dylib and .a files.
However, when I try to compile a c++ file that I temporarily save in ~/Downloads (the first header is #include <boost/array.hpp>), I got the error fatal error: 'boost/array.hpp' file not found.
I am inexperienced in programming, and I really appreciate your help! Thank you!
Use the following include statements and let us know if it works.
#include <boost/numeric/odeint.hpp>
#include <boost/numeric/ublas/matrix.hpp>
If not, some additional info is needed. What is your BOOST version, what is the structure of the /usr/local/include/boost directory, how about including other (non-boost) headers from /usr/local/include (maybe compiler include path is broken).
I asked my professor about this. He gave very detailed explanation, and I think I should share so that everyone can benefit from it:
Theory:
Your compiler needs to know where these files are. You need to find a way to tell it where the files are.
Depending on how you are doing the compiling there will be different solutions. If you are compiling via the command line, use something like
g++ -I/usr/local/Cellar/boost
The -I stands for "include files". There is a similar g++ "switch" called -L for libraries when you get to that stage.
There is also a whole series of tools to tell the compiler how to search for include files. The directory /usr/local/include is almost certainly on the list of places for it to look.
If you are using "make" and the associated tools for compiling, you can add the include directories to part of the "Makefile". Again, the details are different for every setting.
Bottom line -- you'll need to learn more about your compiler system. Find manuals and examples for your specific tools and system. Learn how those tools work and where to specify the boost libraries. Read the boost manuals and learn where they store files and what all the names are for the different directories where these files are stored.
It's not fun work, but it is worthwhile learning about how all the parts get put together.
I'm attempting to compile the OpenCV framework for iOS using the nonfree module. Right now, I'm not able to compile the OpenCV framework, period. I would use the stock iOS opencv2.framework download from the website, except it doesn't include the nonfree module that I need for my project. I've been following the instructions as prescribed here:
http://answers.opencv.org/question/61663/how-to-make-opencv2framework-with-opencv_contrib/
as these appear they might be out of date
http://docs.opencv.org/2.4/doc/tutorials/introduction/ios_install/ios_install.html
https://github.com/Itseez/opencv/issues/4712
However, when I run the command from a folder outside the building directories "python opencv-master/platforms/ios/build_framework.py --contrib opencv_contrib-master ios_contrib" it spits out the following error:
http://pastebin.com/LUep8Tdw
The error doesn't mean much to me. I thought at first it was related to me building it inside the same directory as opencv, but I tried it outside of it and it still failed. Any thoughts? I've tried everything I can possibly think of, and done a bunch of research without coming up with anything.
It appears there's some issue with one of the modules in opencv_contrib. I'm not sure what it is, but I was using version 3.0.0-rc-1. The way I got around it was by moving specific modules from the module folder in the contrib folder into the regular opencv directory's modules folder and then compiling the framework from scratch.
I would like to use OpenCV with CodeBlocks. But I don't know to configure CodeBlocks about "Project build options". I need to precise where are the headers, and functions of openCV.
Firstly I've tried to follow this tutorial : http://kevinhughes.ca/tutorials/opencv-install-on-windows-with-codeblocks-and-mingw/ But I had some problems in the step 4 with the configuration of makefiles. In fact, I am not very sure that I need to use cmake in order to read opencv functions.
Could you help me to configure build options ? I think I need to add "C:\opencv\build\include" about compiler on Search Directories, and about linker, what should I add ?
How add the librairy on CodeBlocks ?
Thank you
In fact CMakeLists.txt is present here : ..\opencv\sources\CMakeLists.txt
I thought CMake would have searched. Then, I use correctly Cmake and he has builded OpenCV. I don't use cygwin, I use the shell of windows. So, after that, I've tried to build the exemple of opencv code in this tutorial, and it works !
Now, when I try to build a project already coded, I don't succeed. In fact, it's a code made by an other person, it use OpenCV and C++. And there is also Java code for Android. But I would like to build and execute only C++ code.
I chose the same settings for OpenCV, but how could I know what I should add in "compiler" and "linker" section ?
Thank you for your help.
Try to change your source directory to C:\opencv\sources and see if that works.
Hello everyone;
i had opencv 2.2 on my vs2010, and i wanted to update so i went to opencv site and:
i've downloaded OpenCV for Windows (ver 2.4.6)
i've extracted it to c:\opencv2.4
i've set the Environment Variable as doc said here: http://docs.opencv.org/doc/tutorials/introduction/windows_install/windows_install.html#windowssetpathandenviromentvariable
( i didnt know what is "PATH EDITOR" so i've just changed Environment variables)
i made property sprite sheets as opencv doc said here: http://docs.opencv.org/doc/tutorials/introduction/windows_visual_studio_Opencv/windows_visual_studio_Opencv.html#windows-visual-studio-how-to
5.but Doc Was Old, and there was no "include" folder in OpenCV2.4/opencv/build/x64/vc10 so I did set include Directory to OpenCV2.4/opencv/build/include in My property sprite sheet.
everything seems true and VS detect include libraries But
VS2010 throw following error when i want to Build the solution:
1>LINK : fatal error LNK1104: cannot open file 'opencv_core231d.lib'
Strange thing is there is no "opencv_core231d.lib" File in c:\opencv2.4 at all!!!
:(
what is the problem?
This is a Linker error, so make sure you are trying to link the correct libraries.
I would suggest to use CMake, which definitely simplifies configuring projects, specially those having dependencies like OpenCV (you can take a look to the OpenCV documentation, or any blog explaining the steps: http://marcosnietoblog.wordpress.com/2011/11/19/opencv-for-windows-easy-installation-using-cmake/ )
By the way, I use to have several versions of opencv on the same folder:
C:\OpenCV\opencv2.4.3
C:\OpenCV\opencv2.4.6
...
So I can easily switch within CMake setting the OpenCV_DIR.
opencv_core231d.lib is a debug version, all the *d.lib and *d.dll files in openCV are with debug symbols.
It is likely that the pre-built release you downloaded doesn't contain debug ones.
either download te source and build both debug and release. Or, if you don't care how opencv works internally, just change the linker flags to use the same lib names with the d
edit. or of course if you donwloaded opencv 2.4.6 the file would be opencv_core246d.lib
I'm using iOS 6.1 and XCode 4.6
I have a problem, OpenCV needs to be compiled with libc++ (LLVM C++ 11), while Tesseract 3.02.03 needs to be compiled with "default compiler".
How can I overcome this problem. at this point I can compile and link only If I comment out OpenCV code or comment out OCR code. cannot make them both work together.
Any ideas??
I am by no means an expert with C++ but I had the same problem and by some trial and error and lots of internet searching I think I managed to solve it.
As I understand it, the problem is that opencv and tesseract are built with different standard libraries. The latest opencv is built with libc++ while tesseract is built with stdlibc++
The solution is to rebuild one of them so they both use the same standard library. I decided to recompile tesseract and followed the instructions found here which references a build script that is used to build the library.
I modified this script (again, by trial an error, not really sure this is the best way) to used the clang++ compiler (CXX="/usr/bin/clang++") and use libc++ (CXXFLAGS="$CFLAGS -stdlib=libc++") and it compiles (albiet with some warnings). You may also need to copy some headers as the script doesn't seem to copy them all.
Then just use this library instead of the downloaded one in your iOS project (remember to change back to libc++ in build settings) and everything will compile and link just fine.
So far it seems to work properly in runtime.