This repository contains a MEX wrapper for Ali Rahimi C++ implementation of fast, multi-label connected components.
Open MatLab (tested with 2015b on Ubuntu 14.04):
>> mex sp_fast_connected_relabel.cpp
Building with 'g++'.
Warning: You are using gcc version '4.8.4'. The version of gcc is not supported. The version currently supported with MEX is
'4.7.x'. For a list of currently supported compilers see: http://www.mathworks.com/support/compilers/current_release.
Warning: You are using gcc version '4.8.4-2ubuntu1~14.04.1)'. The version of gcc is not supported. The version currently
supported with MEX is '4.7.x'. For a list of currently supported compilers see:
http://www.mathworks.com/support/compilers/current_release.
MEX completed successfully.
For simplicity, the function operates on matrices of type double (i.e. mxDOUBLE_CLASS), therefore, the image has to be converted to double:
>> image = imread('checkerboard.png');
>> labels = sp_fast_connected_relabel(double(image));
>> imshow(uint8(labels)*10)
>> imwrite(uint8(labels)*10, 'checkerboard_components.png');
The output can be seen below:
The copyright holder of connected_components.h is Ali Rahimi's. The MEX wrapper is published under the BSD 3-Clause license:
Copyright (c) 2016, David Stutz All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
- Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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