I am lost in a rabbit hole, please bear with me.
I'm trying to use the OpenCV Stitching module from the 2.3.1 Win superpack distribution. I dragged all the source files in /modules/stitching into a Visual Studio project, resolved the Includes and Libs as best I could, and got it to compile.*
The first strange runtime error I had was that I could not read a JPG file from disk with imread(). It did not throw an error, but was returning true for myImage.empty(). I reverted to cvLoadImage() and then it worked.
Now, after that, there is a new runtime error:
Unhandled exception at 0x00870d8f in MyStitcher.exe: 0xC0000005: Access violation writing location 0x010e7000.
This occurs in /modules/stitching/matchers.cpp when trying to pass reference to features.keypoints as a detector_->detect() argument. I assume detect() is supposed to populate the keypoints with its result. features appears to be uninitialized (it has 612933850 empty keypoints at the breakpoint). Now this is starting to sound like the source I'm trying to compile is just broken, but opencv_stitching.exe that comes prebuilt works just fine. Was it compiled from different source?
By the way, I do not know how to use the CMake system to generate Visual Studio projects, as recommended, for OpenCV. The CMakeLists.txt file in the /modules/stitching folder did not work. Is it not supposed to be used as a starting point?
*One note on this: CMakeLists.txt in /modules/stitching specifies some
libs named opencv_core, opencv_imgproc, opencv_highgui, etc. (without
a version indication) but the libs included with OpenCV 2.3.1 Win32
superpack (which I'm linking to) are named opencv_core231.lib,
opencv_imgproc231.lib, etc. Is this a clear indication that I am using
mismatched binaries for the stitching module?
I got this working after building the latest from the OpenCV SVN. The stitching module came a long way since the 231 release.
Related
I am working on a project that uses Adobe's DNG SDK 1.6 library, and it is supposed to work on Windows and MacOS.
The library has instructions on how to build it for both platforms, but I had to figure out an error that came up on Windows with Visual Studio. I am not very experienced with big C++ projects so it was not trivial but I got it working. Most of my own code will be done in C# .Net Core, calling the native libraries using a wrapper class with P/Invoke.
Now for Mac that's a different story, I have a MacOS 11 VM, installed Xcode 12.5.1 and followed the steps provided, as expected, it does not work. Bare in mind this is my first time touching Xcode and MacOS.
The project I am trying to build is dng_validate, and it depends on two libraries built by these projects: XMPFiles64 and XMPCore64.
The library projects build without any hiccups, each one of them creating a ".a" file in the folder: dng_sdk_1_6/xmp/toolkit/public/libraries/macintosh/intel_64_libcpp/Debug, they are named libXMPFilesStaticDebug.a and libXMPCoreStaticDebug.a respectively.
When I try to build the dng_validate project, I get the following error:
Library not found for -lXMPFilesStaticDebug
Because of the the error starting with an "l" instead of "lib", under both libraries project settings, I changed the "Executable Prefix" setting to "l" instead of "lib". Rebuilt both of them and made sure the file names changed as expected. But the error persists when trying to build the main project.
Under dng_validate's project settings, there is a setting called "Library Search Paths" and it does point to the proper aforementioned folder using a relative path. I even changed it to an absolute path to see if that would make it work.
I am really lost here, does anyone have an idea of what might be causing it?
Well... After asking on other forums and almost hiring a freelancer to fix this for me, I tried another shot in the dark of renaming the library files and it worked.
I changed the extensions of libXMPFilesStaticDebug.a and libXMPCoreStaticDebug.a from ".a" to ".dylib" and it just compiled and blew my mind with it.
I am using Code::Blocks with wxwidgets and I have include and lib folders under Document\wxwidgets. I am very new to c++ libraries. In Code::Blocks project initialization, I entered the location for wxwidgets. Then in setting/global enviornment variables I entered in base the Document\wxwidgets again. Still, I am not able to run the app. It shows the error in the include/wx/platform.h file where it says
C:\Users\Programming coder\Documents\wxwidgets\include\wx\platform.h|148|fatal error: wx/setup.h: No such file or directory|
I am not able to solve this and would appreciate some help. Also I checked and the wx folder does not seem to be there in the location. I don't know if that is normal.
Also, I downloaded the headers(include) from the wxwidgets github repo download page, wxWidgets-3.1.1-headers.7z. Any help appreciated.
Also, I am aware some questions exist already, but their problems are in different because most are using linux. Also I am using Code::Blocks IDE.
You need to build wxWidgets itself before building the applications using it. Its build process will create the setup.h file which is currently missing.
Note that, in principle, you could also use precompiled binaries, but in this case you must use exactly the same compiler as was used for compiling them, i.e. TDM gcc.
I'm having difficulties trying to compile an opensource framework (EmulationStation) in VS2015 on Windows. I've never used any of the tools before, apart from Visual Studio - so please forgive me if these are some obvious mistakes.
The guide says i need to do like this:
Boost (you'll need to compile yourself or get the pre-compiled binaries)
Eigen3 (header-only library)
FreeImage
FreeType2 (you'll need to compile)
SDL2
cURL (you'll need to compile or get the pre-compiled DLL version)
(Remember to copy necessary .DLLs into the same folder as the executable: probably FreeImage.dll, freetype6.dll, SDL2.dll, libcurl.dll, and zlib1.dll. Exact list depends on if you built your libraries in "static" mode or not.)
CMake (this is used for generating the Visual Studio project)
(If you don't know how to use CMake, here are some hints: run cmake-gui and point it at your EmulationStation folder. Point the "build" directory somewhere - I use EmulationStation/build. Click configure, choose "Visual Studio [year] Project", fill in red fields as they appear and keep clicking Configure (you may need to check "Advanced"), then click Generate.)
This is how my CMake looks like (it says generating done)
I get alot of compilation errors in visual studio when trying to build though:
1) Cannot open include file: 'curl/curl.h': No such file or directory (compiling source file C:\Users\retropie\Documents\GitHub\EmulationStation\es-app\src\guis\GuiMetaDataEd.cpp) emulationstation C:\Users\retropie\Documents\GitHub\EmulationStation\es-core\src\HttpReq.h
Where do I get this header file from?
2) 'round': redefinition; different exception specifications (compiling source file C:\Users\retropie\Documents\GitHub\EmulationStation\es-app\src\guis\GuiMenu.cpp) emulationstation C:\Users\retropie\Documents\GitHub\EmulationStation\es-core\src\Util.h 18
I have a lot of these errors with round. Am I missing a reference to a library?
Another screendump of some of the errors from VS2015:
Hope someone can point me in the right direction.
I am currently in de same boat as you, trying to get ES building under MSVS2015.
I am also very green, so hopefully others chime in as well.
Regarding the 'round' errors, apparently the MS compiler has no knowledge of these. For this issue, and some others, the newer ES fork by Herdinger has fixed this.
As this is currently the most active ES branch out there, and has the explicit goal of consolidating at least some of the backlog of PRs from the original Aloshi git, I would suggest you use this one.
In issue #4, there is some more information on building in recent VS versions. There is also a link for the precompiled cURL libs, including the header.
Having gone that far, I am sad to say that I still do not have a succesfull build as of yet. Compiling is no problem, however linking gives me a LNK2005 error.
Hope this helps a bit. Let me know how you fare.
Beginner in Image Processing with OpenCV. I am trying to load an Image in VS2010 with OpenCV 2.3.1. However I have the libraries included and the system variables updated. I have checked couple of other forums suggesting using a different version of OpenCV. I have tried using OpenCV 2.4.0 and 2.3.0 and its the same error I receive. Any workaround for this would break the barrier!!
I would suggest that you check to make sure your directories and environmental variables are entered correctly. Then try manually retyping the libraries in the linker, carefully making sure you entered it correctly.
Check in your 'lib' folder (C:\opencv\build\x64\vc10\lib) to make sure you put the right file name in your additional libraries. For example, you could have file opencv_ffmpeg231.lib from version 2.3.1. This may have been the case during the making of the tutorial but change the number to your current version.
i.e, for version 2.4.7 it would be *opencv_ffmpeg247.lib*
just check your "lib' folder to make sure they're the same name
Also, Try this youtube Tutorial for installing OpenCv on Visual Studio. --> http://www.youtube.com/watch?v=cgo0UitHfp8
I have much trouble compiling OpenCV 245 with GPU support. With some effort I managed to have cuda support up and running, but now I am stuck on opencl, here is the problem:
At some point during the compilation, the file kernels.cpp is generated, containing all kernel functions as strings. For what I understand, they are converted automatically from the .cl files with the cl2cpp.cmake script.
What I don't understand is that one file is excluded from the build: nonfree_surf.cl (which is on my disk, alongside all other .cl files) is not included, either in the visual studio project, or in the kernels.cpp that is automatically generated. This leads to an undefined error at link time.
I have tried manually adding the nonfree_surf.cl to the visual studio project. This does not change anything. In the CMakeLists.txt for ocl module, all the cl files seem to be automatically added with the line:
file(GLOB CL_FILES "${CMAKE_CURRENT_SOURCE_DIR}/src/kernels/*.cl")
I have tried manually adding nonfree_surf to CL_FILES, with no effect.
I have very little knowledge of CMake, hence I don't understand well what is going on. Can somebody give me a clue how I could find the reason of this behavior, namely:
Why are all .cl files added to my VS project, except nonfree_surf.cl ?
How can I correct this ?
Maybe I can execute cl2cpp.cmake script manually ? If so, how ?
Managed it by manually running the script:
cmake -DOUTPUT_PATH=c:/opencv/kernels2.cpp -DCL_DIR:PATH=c:/opencv/modules/ocl/src/kernels -P "c:\opencv\modules\ocl\cl2cpp.cmake"
For some reason (probably the same that makes nonfree_surf not be processed), not every necessary function are processed this way, so I juste copy-pasted the nonfree_surf string into kernels.cpp, and proceeded with the build.
If anyone needs the binaries, since they are a pain to compile, here they are:
Opencv 2.4.5 binaries compiled with VS2010 x86 (WIN32) including ocl and gpu library.