I want to configure eclipse-cdt for opencv in ubuntu. I followed the tutorial Using OpenCV with Eclipse (plugin CDT). However, I was ended up with error message
fatal error: cv.h: No such file or directory DisplayImage.cpp /opencvtest line 1 C/C++ Problem
I checked my configurations as indicated in the tutorial. Everything was fine except the information in 8.b.
As tutorial says for pkg-config --libs opencv, the output should be,
-L/usr/local/lib -lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_ml -lopencv_video -lopencv_features2d -lopencv_calib3d -lopencv_objdetect -lopencv_contrib -lopencv_legacy -lopencv_flann
But in my case the output was,
/usr/local/lib/libopencv_calib3d.so /usr/local/lib/libopencv_contrib.so /usr/local/lib/libopencv_core.so /usr/local/lib/libopencv_features2d.so /usr/local/lib/libopencv_flann.so /usr/local/lib/libopencv_gpu.so /usr/local/lib/libopencv_highgui.so /usr/local/lib/libopencv_imgproc.so /usr/local/lib/libopencv_legacy.so /usr/local/lib/libopencv_ml.so /usr/local/lib/libopencv_nonfree.so /usr/local/lib/libopencv_objdetect.so /usr/local/lib/libopencv_photo.so /usr/local/lib/libopencv_softcascade.so /usr/local/lib/libopencv_stitching.so /usr/local/lib/libopencv_ts.so /usr/local/lib/libopencv_video.so /usr/local/lib/libopencv_videostab.so
Can anyone help me to fix this problem.
Thank you in advance.
Try to change your header from:
#include <cv.h>
#include <highgui.h>
to:
#include <opencv2/opencv.hpp>
#include <opencv2/highgui/highgui.hpp>
Thank you for all the answers. But the gain for the problem is bit strange. Here is it.
I am using ubuntu 12.1. I installed opencv using "git" as in the doc. Installation was completed without errors, but i received the above mentioned error.
Since any of the answers (#Alexander and # Ann) didn't make any effect, I re-installed opencv using the downloaded file from "sourceforge". Then it worked perfectly. I think the problem was with the file I downloaded through git.
Anybody has any reason for this issue ?
Related
I am using Eclipse C++ and try to using OpenCV for the first time, everything is normal until when I use the command $ pkg-config --libs opencv to locating my library path of OpenCV, it return me like this:
-lopencv_shape -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_datasets -lopencv_dpm -lopencv_face -lopencv_freetype -lopencv_fuzzy -lopencv_hdf -lopencv_line_descriptor -lopencv_optflow -lopencv_video -lopencv_plot -lopencv_reg -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_phase_unwrapping -lopencv_rgbd -lopencv_viz -lopencv_surface_matching -lopencv_text -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_xobjdetect -lopencv_objdetect -lopencv_ml -lopencv_xphoto -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_photo -lopencv_imgproc -lopencv_core
And at what I have seen in the document of OpenCV or some instruction videos, its should be the the path at the head, but with mine is not. And since I don't know where is my library path is, I cannot add the path into my program properties and run my first simple program on OpenCV. If anyone can give me solution or advise, I will very be grateful.
I had problems making mexmaci64 files using Mex from both jpeg_read.c and jpeg_write.c from jpeg toolbox. I asked my question here and the problem for jpeg_read solved.
but I still have a different error when I compile jpeg_write.c.
everything is the same and I didn't change any path or anything.
I don't understand why Matlab console returns this error.
Is this familiar to anybody? please let me know.
>> mex -compatibleArrayDims -I/usr/local/Cellar/jpeg/9d/include jpeg_write.c -L/usr/local/Cellar/jpeg/9d/lib -ljpeg
Building with 'Xcode with Clang'.
Error using mex
/Users/folder/jpeg_toolbox/jpeg_write.c:56:10: fatal error: 'jpegint.h' file not found
#include <jpegint.h>
^~~~~~~~~~~
1 error generated.
First off:
By pointing at the /usr/local/Cellar/jpeg/<version>/include location of the jpeg or other libraries, you're dependent on the specific version that is currently installed. You probably want to use /usr/local/opt/jpeg/include/ etc instead. /usr/local/opt is where Homebrew exposes its non-versioned presentations of its installed package contents.
So:
mex -compatibleArrayDims -I/usr/local/Cellar/jpeg/9d/include ...
This is pointing at the jpeg library. Does the jpeg library supply jpegint.h?
$ ls /usr/local/Cellar/jpeg/9d/include/
jconfig.h jerror.h jmorecfg.h jpeglib.h
Nope. So that's why it's not found. So you have to figure out where you can actually get jpegint.h from. Hit Google and consult your documentation to figure out what library you're actually trying to pull jpegint.h from, and pull that in, too, with the appropriate -I, -L, and -l flags.
If you think you have it already installed, you can use find /usr/local/Cellar -name jpegint.h to look for it. I found it in the gdcm package.
[~] $ find /usr/local/Cellar -name jpegint.h
/usr/local/Cellar/gdcm/3.0.8_1/include/gdcm-3.0/gdcmjpeg/jpegint.h
So you probably want something like:
mex -compatibleArrayDims -I/usr/local/opt/jpeg/include ...
-I/usr/local/opt/gdcm/include/gdcm-3.0/gdcmjpeg ...
jpeg_write.c ...
-L/usr/local/opt/jpeg/lib -L/usr/local/opt/gdcm/lib ...
-ljpeg -lgdcmjpeg16
(I don't know if you actually want -lgdcmjpeg8, -lgdcmjpeg12, or -lgdcmjpeg16, or maybe something else. I'm just guessing here. Consult the GDCM documentation.)
Been trying to use log4c in an eclipse IDE. No matter what I try, I can't seem to resolve the __log4c_category_vlog reference in my link.
I can see __log4c_category_vlog via an objdump of the liblog4c.a file, I've tried modifying some of the code in the category.c/category.h files before I do the make/make install, all to no avail. I've set my linker to point to the proper lib64 folder, added proper include etc in Eclipse.
The sample programs that come with log4c compile/link/run ok, so I must be missing something obvious. Any help/heads up appreciated!
log4c version:1.2.4
Eclipse version:luna
Linux: Opensuse 13.2
gcc version: 4.8.3 20140627
/home/david/build3/include/log4c/category.h:359: undefined reference to __log4c_category_vlog'
makefile:30: recipe for target 'testLog4c' failed
./src/testLog4c.o: In functionlog4c_category_log':
Update
Thank you Vladimir for the usefull insights in libraries. I took another approach, developping first in ubuntu (which was a lot easier then messing around with Eclipse/Cygwin/... and now I'm trying to port to windows, which goes rather ok, however I have some questions about that too, posted here: Problems with porting a fortran program from ubuntu to windows
Question
I currently have the following setup and can't get the lapack library configured so that my fortran code can compile:
Windows 7
Cygwin installation (for GNU fortran), added to the windows PATH
lapack and liblapack-devel installed with cygwin
resulting in liblapack.a and libblas.a in the folder C:/cygwin/lib
In my program I call the lapack library using the following code
program myProgram
!use lapack (stays commented now)
...
In Eclipse I used the following setup (with the Photran package):
Fortran Project: executable GNU fortran on Windows (GCC toolchain)
GNU fortran compiler: gfortran ${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}
GNU fortran linker: gfortran ${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}
I compiled the libraries libblas.a and liblapack.a, to use as a static library, for windows and they are located in the C:/cygwin/lib folder. In the GNU fortran linker properties, the libraries were called lapackand blasin the folder C:/cygwin/lib. This results in a part -L"C:/cygwin/lib" -llapack -lblas in the {$COMMAND} section of the compiler and linker. (thanx to #vladimir-f for the help)
In the output there are no error messages left anymore. Only I got now the following error in Eclipse and no final .exe or bins:
Errors occured during the build.
Errors running builder 'CDT Builder' on project 'Hamfem'
Internal error building project Hamfem configuration
Release
java.lang.NullPointerException
Internal error building project Hamfem configuration
Release
java.lang.NullPointerException
However, the result of the build is still an executable, in this case called Hamfem.exe. Running this file results in the error message (instead of the routine): The program can't start because cyglapack-0.dll is missing from your computer. Try reinstalling the program to fix this problem.
That file is currently located in C:/cygwin/lib/lapack/ but I want that this file isn't needed to run the program, so I can run it on different computers. Can someone collaborate on this?
Second, when copy-pasting the .dll file in the folder where the .exe is located, it runs for a brief second, generating a stackdump file. I can't use the debugger in Eclipse-Photran due to the 'Building Workspace' error. Eclipse gives the message Binary not found when I want to run it in Eclipse as a local Fortran program. Any ideas how to resolve this problem?
The problem is here
L/lib/lapack –llapack
try to change it for
-L/lib/lapack –llapack
probably it is in you Makefile.
i.e.
gfortran -funderscoring -O3 -Wall -c -fmessage-length=0 -L/lib/lapack -llapack -o
And make sure lapack.mod is really in /lib/lapack which is probably C:\cygwin\lib\lapack on Cygwin.
I am using Windows XP and matlab version is 7.10.0.
I have the levmar(Levenberg Marquardt) package from http://www.ics.forth.gr/~lourakis/levmar/levmar-2.5.tgz
In the README file, we are told to compile in matlab using mex using the following command:
mex -DHAVE_LAPACK -I.. -O -L -L levmar.c -llevmar -lclapack -lblas -lf2c.
I downloaded lapack.lib , blas.lib and f2c.lib for windows
UPDATE:
The original error got resolved after I built a vc project file given in the package.
But now there are some error messages like :
levmar.lib(misc.obj) : error LNK2019: unresolved external symbol _dgemm_ referenced in function _dlevmar_trans_mat_mat_mult
Did you create a file with a mex-function gateway? You can't just compile a c-function for Matlab; you need to do a little bit of work to take care of the I/O between Matlab and the c-code.
If you follow the steps outlined in this document, you should do fine.
You may have a look at immoptibox, which comprises Levenberg-Marquardt algorithm as well.
I just figured it out after searching a while and noticed that the levmar package included a vc project file which i needed to build and it created a file called levmar.lib .
But now I am getting some errors which involves messages like 'unable to resolve external symbols'