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/*
* util.cpp
*
* Copyright 2012 Florian Jung <florian.a.jung@web.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License Version 3
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include "util.h"
float flopow(float b, float e)
{
return (b>=0.0) ? (powf(b,e)) : (-powf(-b,e));
}
Mat circle_mat(int radius)
{
Mat result(radius*2+1, radius*2+1, CV_8U);
for (int x=0; x<=result.cols/2; x++)
for (int y=0; y<=result.rows/2; y++)
{
unsigned char& p1 = result.at<unsigned char>(result.cols/2 + x, result.rows/2 + y);
unsigned char& p2 = result.at<unsigned char>(result.cols/2 - x, result.rows/2 + y);
unsigned char& p3 = result.at<unsigned char>(result.cols/2 + x, result.rows/2 - y);
unsigned char& p4 = result.at<unsigned char>(result.cols/2 - x, result.rows/2 - y);
if ( x*x + y*y < radius*radius )
p1=p2=p3=p4=255;
else
p1=p2=p3=p4=0;
}
return result;
}
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