Convert mat model to opencv storage xml/yaml model

[TimSC]

I have compiled PartsBasedDetector without MatlabIO. This can only read models with xml or yaml format. The model training_demo.m code (which I run in octave) saves the model as mat format.

model = trainmodel(name,pos,neg,K,pa,sbin);
save('Demo_model.mat', 'model', 'pa', 'sbin', 'name');

There does not seem to be a clear way to covert from .mat to .xml, or am I missing something?

Has matio been considered to read models in C++? http://sourceforge.net/projects/matio/

Regards,

Tim

[TimSC]

@vrabaud I just noticed the conversion is in ModelTransfer.cpp but I can't compile it without MatlabIO. I probably will try to do the conversion using matio. Is it possible for someone to send me a model in both formats so I can check my result is correct?

[vrabaud]

Not sure we have models around with both format. Why not use the cvmatio by @hbristow ?
https://github.com/hbristow/cvmatio

[TimSC]

cvmatio depends on MatlabIO.hpp (which I don't currently have). I assumed this was included in Matlab but I could be wrong...

Can someone generate a model in mat format and convert it, if they have compiled ModelTransfer.cpp with MatlabIO enabled?

[TimSC]

I just realized that MatlabIO is provided by cvmatio. Ooops!

cvmatio probably should be a submodule of this project or perhaps just use matio because it supports a wider range of matlab formats such as hdf.

[hbristow]

Glad you found it :)
The reason I developed cvmatio, was so that eventually we could tightly integrate it as part of cv::FileStorage(). See: http://answers.opencv.org/question/9487/matlab-api-for-opencv/#post-id-9585. The code-base for matio is too fragmented for my liking, and doesn't make use of C++ constructs for type-safe generic storage. You're right though, cvmatio should be made a submodule like models.

H

On 03/04/2013, at 8:40 AM, Tim Sheerman-Chase notifications@github.com wrote:

I just realized that MatlabIO is provided by cvmatio. Ooops!

cvmatio probably should be a submodule of this project or perhaps just use matio because it supports a wider range of matlab formats such as hdf.

—
Reply to this email directly or view it on GitHub.

[TimSC]

@hbristow I have trained a model based on the buffy stickmen data using octave and I have saved it in matlab v7 format. I am using cvmatio to open the file but it doesn't deserialise correctly.

It appears that the call to name_ = cvmatio.findstd::string(variables, "name"); in MatlabIO.cpp line 84 throws an exception. Any ideas on what to check? Does cvmatio support octave exported matlab v7 files?

Model: http://www.sheerman-chase.org.uk/temp/buffy_model_v7.mat

Tim

[TimSC]

I found I made a mistake in converting the file in octave to v7. Problem solved! Model is convertible.

[kinjali]

@hbristow i am converting .mat file into opencv style using opencv 3.0 and i am getting this
error: /tmp/ccOrkTWM.o: In function main': matlabopencv.cpp:(.text+0xb6): undefined reference to MatlabIO::open(std::__cxx11::basic_string<char, std::char_traits, std::allocator >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >)'
matlabopencv.cpp:(.text+0x147): undefined reference to MatlabIO::read()' matlabopencv.cpp:(.text+0x184): undefined reference to MatlabIO::close()'
/tmp/ccOrkTWM.o: In function MatlabIO::~MatlabIO()': matlabopencv.cpp:(.text._ZN8MatlabIOD2Ev[_ZN8MatlabIOD5Ev]+0xe): undefined reference to MatlabIO::close()'
collect2: error: ld returned 1 exit status
please help me how to solve it