fast_marching_inl.hpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009-2011, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's 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.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
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//M*/
#ifndef __OPENCV_VIDEOSTAB_FAST_MARCHING_INL_HPP__
#define __OPENCV_VIDEOSTAB_FAST_MARCHING_INL_HPP__
#include "opencv2/videostab/fast_marching.hpp"
namespace cv
{
namespace videostab
{
template <typename Inpaint>
Inpaint FastMarchingMethod::run(const cv::Mat &mask, Inpaint inpaint)
{
using namespace std;
using namespace cv;
CV_Assert(mask.type() == CV_8U);
static const int lut[4][2] = {{-1,0}, {0,-1}, {1,0}, {0,1}};
mask.copyTo(flag_);
flag_.create(mask.size());
dist_.create(mask.size());
index_.create(mask.size());
narrowBand_.clear();
size_ = 0;
// init
for (int y = 0; y < flag_.rows; ++y)
{
for (int x = 0; x < flag_.cols; ++x)
{
if (flag_(y,x) == KNOWN)
dist_(y,x) = 0.f;
else
{
int n = 0;
int nunknown = 0;
for (int i = 0; i < 4; ++i)
{
int xn = x + lut[i][0];
int yn = y + lut[i][1];
if (xn >= 0 && xn < flag_.cols && yn >= 0 && yn < flag_.rows)
{
n++;
if (flag_(yn,xn) != KNOWN)
nunknown++;
}
}
if (n>0 && nunknown == n)
{
dist_(y,x) = inf_;
flag_(y,x) = INSIDE;
}
else
{
dist_(y,x) = 0.f;
flag_(y,x) = BAND;
inpaint(x, y);
narrowBand_.push_back(DXY(0.f,x,y));
index_(y,x) = size_++;
}
}
}
}
// make heap
for (int i = size_/2-1; i >= 0; --i)
heapDown(i);
// main cycle
while (size_ > 0)
{
int x = narrowBand_[0].x;
int y = narrowBand_[0].y;
heapRemoveMin();
flag_(y,x) = KNOWN;
for (int n = 0; n < 4; ++n)
{
int xn = x + lut[n][0];
int yn = y + lut[n][1];
if (xn >= 0 && xn < flag_.cols && yn >= 0 && yn < flag_.rows && flag_(yn,xn) != KNOWN)
{
dist_(yn,xn) = min(min(solve(xn-1, yn, xn, yn-1), solve(xn+1, yn, xn, yn-1)),
min(solve(xn-1, yn, xn, yn+1), solve(xn+1, yn, xn, yn+1)));
if (flag_(yn,xn) == INSIDE)
{
flag_(yn,xn) = BAND;
inpaint(xn, yn);
heapAdd(DXY(dist_(yn,xn),xn,yn));
}
else
{
int i = index_(yn,xn);
if (dist_(yn,xn) < narrowBand_[i].dist)
{
narrowBand_[i].dist = dist_(yn,xn);
heapUp(i);
}
// works better if it's commented out
/*else if (dist(yn,xn) > narrowBand[i].dist)
{
narrowBand[i].dist = dist(yn,xn);
heapDown(i);
}*/
}
}
}
}
return inpaint;
}
} // namespace videostab
} // namespace cv
#endif