Blog!
I plan to post about my research in computer vision, photography and birding.
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
Writing 3D range grid data to PLY file
I have been working on fixing 3D scanner capable of scanning entire human body. I needed to export the scanner data to Scanalyze to figure out what was wrong with the scanner. I could not find something easy and quick which I could use to export the range grid data …
Running Japanese application on windows 7
I have English(US) as my locale on my computer. I have this program which fails to run if locale is anything but Japanese. So only solution I thought I had was switching locale of the system. But that is inconvenient. After a little search, I found Applocale utility. http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=13209 But …
Super-Resolution Tools
LCAV | Super-Resolution. Robust and Fast Super Resolution Super–resolution – Reproducible Research
Runtime enum-to-type mapping
Both Matlab array mxArray and OpenCV’s Mat can hold data any basic type. I want to write code which essentially can handle any data type. My current solution is to write template based code for data processing. I call this code with a switch/case statement. I wanted to avoid rewriting …
Using cv::Mat at()
How does one access (i,j) th location and k th channels of a 2D cv::Mat. Here k is not constant at runtime. I was thinking cv::Mat at<T>(i,j,k) will do it. But it does not. So how do I do this?
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 !