mex compliation problem with include paths for file mexopts.bat

HI,

I am really very Frustrated of doing mex stuff, I am trying for more than 3 Days I know there is very little thing that need to be done to make mex displayImage.cpp to work

I have installed VS10, SDK7.1, MAtlab2012a,opencv 2.3, Everything is fine

Also I am not able to run mex-setup again it giving me following error

    mex-setup
    Usage: 
        MEX [option1 ... optionN] sourcefile1 [... sourcefileN] 
            [objectfile1 ... objectfileN] [libraryfile1 ... libraryfileN] 

    Use the -help option for more information, or consult the MATLAB API Guide. 

C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: No file names given. 

Undefined function or variable 'setup'

and if I run the cpp File it gives me following error

 mex displayImage.cpp
displayImage.cpp 
displayImage.cpp(5) : fatal error C1083: Cannot open include file: 'stdio.h': No such file or directory 

C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Compile of 'displayImage.cpp' failed. 

   Error using mex (line 206)
  Unable to complete successfully.

even stdio.h is inside the folder of my current working Directory.

Looking forward....

Thanks and regards

[Kaustubha Govind]

Try mex -setup (there is a space before the hyphen).

[Muhammad Ali Qadar]

thanks for this correction but now I am still getting this error Please can you tell me how to set all the procedure to accomplish mex compilation, the error

   mex -setup

Welcome to mex -setup.  This utility will help you set up  
a default compiler.  For a list of supported compilers, see  
 http://www.mathworks.com/support/compilers/R2012a/win32.html 

   Please choose your compiler for building MEX-files: 

   Would you like mex to locate installed compilers [y]/n? y

   Select a compiler: 
   [1] Lcc-win32 C 2.4.1 in C:\PROGRA~1\MATLAB\R2012a\sys\lcc 
  [2] Microsoft Software Development Kit (SDK) 7.1 in C:\Program      Files\Microsoft Visual Studio 10.0 
   [3] Microsoft Visual C++ 2010 in C:\Program Files\Microsoft Visual    Studio 10.0 

 [0] None 

Compiler: 3

   Please verify your choices: 

Compiler: Microsoft Visual C++ 2010   
Location: C:\Program Files\Microsoft Visual Studio 10.0 

Are these correct [y]/n? y

*************************************************************************

Warning: MEX-files generated using Microsoft Visual C++ 2010 require 
         that Microsoft Visual Studio 2010 run-time libraries be  
         available on the computer they are run on. 
         If you plan to redistribute your MEX-files to other MATLAB 
         users, be sure that they have the run-time libraries. 
*************************************************************************** 
  C:\Program Files\Microsoft Visual Studio 10.0 
 Error using mex (line 206)
  Unable to complete successfully.

[Muhammad Ali Qadar]

Moreover, if i run displayImage.cpp file do you have any idea how to do this for opencv

   mex displayImage.cpp it gives following error
   mex displayImage.cpp
   displayImage.cpp 
displayImage.cpp(7) : fatal error C1083: Cannot open include file: 'cv.h': No such file or directory 

C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Compile of 'displayImage.cpp' failed. 

Error using mex (line 206)
Unable to complete successfully.

[Muhammad Ali Qadar]

@Kaustubha Govind, Also I am giving path in mexopts.bat is given below

 set OPENCVDIR=C:\opencv;

 set LIB=%OPENCVDIR%\build\x86\vc10\lib; 
 set PATH=%OPENCVDIR%\build\x86\vc10\bin;
 set INCLUDE=%OPENCVDIR%\include\opencv\cvaux;
 set INCLUDE=%OPENCVDIR%\include\opencv\cv;
 set INCLUDE=%OPENCVDIR%\include\opencv\cxcore;
 set INCLUDE=%OPENCVDIR%\include\opencv\highgui;
 set INCLUDE=%OPENCVDIR%\include\opencv\cvcam;

 and set LINKFLAGS=/dll /export:%ENTRYPOINT% /LIBPATH:"%LIBLOC%" libmx.lib libmex.lib libmat.lib cv.lib cvaux.lib cxcore.lib cxcore.lib highgui.lib cvcam.lib /MACHINE:X86 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /manifest /incremental:NO /implib:"%LIB_NAME%.x" /MAP:"%OUTDIR%%MEX_NAME%%MEX_EXT%.map"

all this is in the guideline given in the mathworks website, I tried to do as it is and Environment variable I set is OPENCVDIR C:\opencv\build

and Path Variable is edited as %OPENCVDIR%\build\x86\vc10\bin

I dont where I am wrong ????

[Kaustubha Govind]

Could you try mex displayImage.cpp -IC:\opencv (assuming that C:\opencv is where cv.h is present).

[Muhammad Ali Qadar]

@Kaustubha Govind, I did this

 mex displayImage.cpp -l C:\opencv
displayImage.cpp 
displayImage.cpp(7) : fatal error C1083: Cannot open include file: 'cv.h': No such file or directory 

C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Compile of 'displayImage.cpp' failed. 

   Error using mex (line 206)
  Unable to complete successfully.

infact I want to use opencv functions in matlab is there anyother option to use them without mex. mex is hell hardcoded thing I dont how I can get out of this Problem, hope you are having some solutions

[Jan]

@Muhammad: Kaustubha asked you to try:

mex displayImage.cpp -IC:\opencv

You have tried:

mex displayImage.cpp -l C:\opencv

Do you see the difference?

[Muhammad Ali Qadar]

@Jan Simon, I have tried all possible ways, problem is somewhere else please have a look at my configuration in previous comments

   mex displayImage.cpp -lC:\opencv
  displayImage.cpp 
displayImage.cpp(7) : fatal error C1083: Cannot open include file: 'cv.h': No such file or directory 

C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Compile of 'displayImage.cpp' failed. 

Error using mex (line 206)
Unable to complete successfully.

[Friedrich]

Still not what you were asked for. There is a big difference between

 -lC:\opencv

and

 -IC:\opencv

Please try it again correctly with

 -IC:\opencv

[Jan]

@Muhammad: "l" is a lowercase L, "I" is an uppercase "i".

[Muhammad Ali Qadar]

@Jan, So its 'i' Capital , this is also giving same result, @Jan, I think Problem is with include paths or somewhere else, this is error

    mex displayImage.cpp -IC:\opencv
  displayImage.cpp 
  displayImage.cpp(7) : fatal error C1083: Cannot open include file:    'cv.h': No such file or directory 

    C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Compile of     'displayImage.cpp' failed. 

   Error using mex (line 206)
   Unable to complete successfully.

[Muhammad Ali Qadar]

@Jan, also This is the code of displayImage.cpp

/******************************************************************* This is a simple MEX file. It just calls OpenCV functions for loading, smothing and diaplaying the results ******************************************************************/

 #include <stdio.h>
#include <stdlib.h>
#include <cv.h>
#include <highgui.h>
#include "mex.h"

 int smoothImage(char* filename){
    //load the image
    IplImage* img = cvLoadImage(filename);
    if(!img){
            printf("Cannot load image file: %s\n",filename);
            return -1;}
    //create another image
    IplImage* img_smooth = cvCloneImage(img);
    //smooth the image img and save the result to img_smooth
    cvSmooth(img, img_smooth, CV_GAUSSIAN, 5, 5);
    // create windows to show images
    cvNamedWindow("Original Image", CV_WINDOW_AUTOSIZE);
    cvMoveWindow("Original Image", 100, 100);
    cvNamedWindow("Smoothed Image", CV_WINDOW_AUTOSIZE);
    cvMoveWindow("Smoothed Image", 400, 400);
    // show the images
    cvShowImage("Original Image", img );
    cvShowImage("Smoothed Image", img_smooth );
    // wait for a key
    cvWaitKey(0);
    //destroy windows
    cvDestroyWindow("Original Image");
    cvDestroyWindow("Smoothed Image");
    //release images
    cvReleaseImage(& img);
    cvReleaseImage(& img_smooth);
    return 0;};

 void mexFunction(int nlhs, mxArray* plhs[], int nrhs, const mxArray* prhs[]){
    if (nrhs != 0){
        mexErrMsgTxt("Do not give input arguments.");}
    if (nlhs != 0){
        mexErrMsgTxt("Do not give output arguments.");}
    char *name = "cameraman.png";
    smoothImage(name);}

[Muhammad Ali Qadar]

@Jan Simon, @Kaustubha Govind, what you think Finally I am thinking to reinstall VS10 and matlab, is there any Suggestion from you ???

[Muhammad Ali Qadar]

one thing I have seen that when I run mex -setup then it wipe out all paths that are newly added to it, and therefore it can not find cv.h or else things

[Jan]

Please test, if cv.h is where you expect it:

exist('C:\opencv\ch.h', 'file')

Try the quotes instead of < and >:

#include "cv.h"

Answer 1

[turab]

i have the exact same problem. i have also read on a page that matlab 2012a and visual studio 2010 donot support initially there is a patch for this purpose i have downloaded this patch and placed in the matlabroot but the problem remains the same the error i am constantly getting is : mex displayimg.cpp Error: Could not find the compiler "cl" on the DOS path. Use mex -setup to configure your environment properly.

C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Unable to locate compiler. 
plz give me some helpful suggestions thanx.

[Ken Atwell]

This error is unrelated to what Muhammad is reporting -- I recommend you begin a new topic.

[Muhammad Ali Qadar]

@turab, please read the comment of Kaustubha Govind carefully.

Answer 2

[Ken Atwell]

I would not reinstall MATLAB or Visual Studio; you have a path problem that reinstalling will not solve.

Are you sure cv.h is in C:\opencv, and not a subfolder under it? I am not familiar with OpenCV, but I would try:

 mex -IC:\opencv\include\opencv displayImage.cpp

If that fails, open the Explorer and locate the name of the folder where cv.h is found. Wherever that is, put that folder name (not filename) as the -I parameter to MEX.

And, yes, if you rerun "mex -setup", it will clobber any customization you may have made to mexopt.bat. In general, I would only edit this file as a last resort.

[Muhammad Ali Qadar]

@Ken Atwell, your answer is very Logical it should solve the problem, I can show what I got , I Have tried from two different Path to access ch.h, it is accessing it but Still some problem, i am so sorry lot of troubleshooting could not solve it,

 mex -IC:\opencv\opencv\include\opencv displayImage.cpp
displayImage.cpp 
C:\opencv\opencv\include\opencv\cv.h(63) : fatal error C1083: Cannot open include file: 'opencv2/core/core_c.h': No such file or directory 

C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Compile of 'displayImage.cpp' failed. 

 Error using mex (line 206)
Unable to complete successfully.

 >> mex -IC:\opencv\build\include\opencv displayImage.cpp
displayImage.cpp 
 C:\opencv\build\include\opencv\cv.h(63) : fatal error C1083: Cannot open include file: 'opencv2/core/core_c.h': No such file or directory 

   C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Compile of 'displayImage.cpp' failed. 

 Error using mex (line 206)
 Unable to complete successfully.

[Jan]

These message mean, that you've found two cv.h files successfully:

1. C:\opencv\opencv\include\opencv\cv.h
2. C:\opencv\build\include\opencv\cv.h

Is it correct, that there are duplicates of this file? Perhaps the OpenCV installation is damaged?

But now the compiler cannot find opencv2/core/core_c.h... You can search for the folder "opencv2/core". I assume, your trials to solve the original problem produced some problems.

[Muhammad Ali Qadar]

@Jan Simon, Its the Structure of opencv that it distributes its folder in the above mentioned hierarchy, I have seen opencv2 folder and it includes the specified files, When I give opencv2 in path then i could not find cv.h, if I give cv.h then i can not find core_c.h please have a look, I am missing some path somewhere

   >> mex -IC:\opencv\opencv\build\include\opencv2 displayImage.cpp
displayImage.cpp 
displayImage.cpp(7) : fatal error C1083: Cannot open include file: 'cv.h': No such file or directory 

C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Compile of 'displayImage.cpp' failed. 

Error using mex (line 206)
Unable to complete successfully.

[Muhammad Ali Qadar]

@Jan Simon, @Ken Atwell, is there still anything that I can do???

[Muhammad Ali Qadar]

Also My Opencv with Visual Studio 10 Is working fine I have run an example but with matlab problem is not getting solved