MEX functions – Ninad Thakoor

Archive by category "MEX functions"

Using Converter class to use cv::undistort in Matlab

OpenCV function void undistort(const Mat& src, Mat& dst, const Mat& cameraMatrix, const Mat& distCoeffs, const Mat& newCameraMatrix=Mat()) Matlab dst=mexUndistort(src,cameraMatrix,distCoeffs) MEX function source To compile you need opencv and boost. Mex command I used with Matlab R2011a and VC9 goes like this: mex mexUndistort.cpp matcv.cpp -IC:OpenCV2.3buildinclude -ID:NinadToolsboost_1_47_0 -LC:OpenCV2.3buildx64vc9lib -lopencv_core230 -lopencv_imgproc230 …

Using OpenCV functions in Matlab

I wrote Converter class few days back to simplify creating MEX files for OpenCV functions. Example of using the class follows in the next post. Source for matcv.h Source for matcv.cpp

Fixing the problem

Steps followed Check what Visual studio Matlab was compiled with. Browsed to C:Program FilesMATLABR2011abinwin64, I see boost dlls with vc90 in their names, so I am guessing Visual studio 2008 AKA VC9 was used. Just to be absolutely sure, I used Dependency Walker and opened libmex.dll in it. It shows VC9 …

The problem!

I tried compiling following piece of code with “mex”. Matlab version: R2011a C++ Compiler: Visual Studio 2010 This compiles fine. But crashes Matlab, if you run “test” in Matlab. In debug mode (“mex” with -g), leads to an assertions failure !

Combining OpenCV, C++ and Matlab MEX-functions: Not as easy I thought!

OpenCV and Matlab are my favorite tools. Recently I decided to write a C++ interface between the two to take advantage of some of the neat features of OpenCV’s C++ interface. But alas, I was met with crash after crash of Matlab. Initially, I had no clue. After doing some digging, I …

Category: MEX functions

Using Converter class to use cv::undistort in Matlab

Using OpenCV functions in Matlab

Fixing the problem

The problem!

Combining OpenCV, C++ and Matlab MEX-functions: Not as easy I thought!

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