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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.
//
// Copyright (C) 2013, Alfonso Sanchez-Beato, 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 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,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#include "precomp.hpp"
#include <opencv2/imgproc.hpp>
#include "opencv2/reg/mapaffine.hpp"
namespace cv {
namespace reg {
////////////////////////////////////////////////////////////////////////////////////////////////////
MapAffine::MapAffine(void)
: linTr_(Matx<double, 2, 2>::eye()), shift_()
{
}
////////////////////////////////////////////////////////////////////////////////////////////////////
MapAffine::MapAffine(const Matx<double, 2, 2>& linTr, const Vec<double, 2>& shift)
: linTr_(linTr), shift_(shift)
{
}
////////////////////////////////////////////////////////////////////////////////////////////////////
MapAffine::~MapAffine(void)
{
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void MapAffine::inverseWarp(const Mat& img1, Mat& img2) const
{
// Rows and columns in destination
Mat dest_r, dest_c;
dest_r.create(img1.size(), CV_32FC1);
dest_c.create(img1.size(), CV_32FC1);
for(int r_i = 0; r_i < img1.rows; ++r_i)
{
for(int c_i = 0; c_i < img1.cols; ++c_i)
{
dest_c.at<float>(r_i, c_i) = float(c_i*linTr_(0, 0) + r_i*linTr_(0, 1) + shift_(0));
dest_r.at<float>(r_i, c_i) = float(c_i*linTr_(1, 0) + r_i*linTr_(1, 1) + shift_(1));
}
}
//remap(img1, img2, dest_c, dest_r, INTER_CUBIC, BORDER_REPLICATE);
// Parts that cannot be interpolated will be as in img1 (BORDER_TRANSPARENT means that
// remap will not touch them).
img1.copyTo(img2);
remap(img1, img2, dest_c, dest_r, INTER_CUBIC, BORDER_TRANSPARENT);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
Ptr<Map> MapAffine::inverseMap(void) const
{
Matx<double, 2, 2> invLinTr = linTr_.inv(DECOMP_LU);
Vec<double, 2> invShift = -invLinTr*shift_;
return Ptr<Map>(new MapAffine(invLinTr, invShift));
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void MapAffine::compose(const Map& map)
{
// Composition of affine transformations T and T' is (T o T') = A'Ax + A'b + b'
const MapAffine& mapAff = static_cast<const MapAffine&>(map);
Matx<double, 2, 2> compMat = mapAff.getLinTr()*linTr_;
Vec<double, 2> compShift = mapAff.getLinTr()*shift_ + mapAff.getShift();
linTr_ = compMat;
shift_ = compShift;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void MapAffine::scale(double factor)
{
// Only the shift is affected in this transformation
shift_ *= factor;
}
}} // namespace cv::reg