/*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, 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,
// 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*/
#ifndef __OPENCV_STITCHING_EXPOSURE_COMPENSATE_HPP__
#define __OPENCV_STITCHING_EXPOSURE_COMPENSATE_HPP__
#include "opencv2/core.hpp"
namespace cv {
namespace detail {
//! @addtogroup stitching_exposure
//! @{
/** @brief Base class for all exposure compensators.
*/
class CV_EXPORTS ExposureCompensator
{
public:
virtual ~ExposureCompensator() {}
enum { NO, GAIN, GAIN_BLOCKS };
static Ptr<ExposureCompensator> createDefault(int type);
/**
@param corners Source image top-left corners
@param images Source images
@param masks Image masks to update (second value in pair specifies the value which should be used
to detect where image is)
*/
void feed(const std::vector<Point> &corners, const std::vector<UMat> &images,
const std::vector<UMat> &masks);
/** @overload */
virtual void feed(const std::vector<Point> &corners, const std::vector<UMat> &images,
const std::vector<std::pair<UMat,uchar> > &masks) = 0;
/** @brief Compensate exposure in the specified image.
@param index Image index
@param corner Image top-left corner
@param image Image to process
@param mask Image mask
*/
virtual void apply(int index, Point corner, InputOutputArray image, InputArray mask) = 0;
};
/** @brief Stub exposure compensator which does nothing.
*/
class CV_EXPORTS NoExposureCompensator : public ExposureCompensator
{
public:
void feed(const std::vector<Point> &/*corners*/, const std::vector<UMat> &/*images*/,
const std::vector<std::pair<UMat,uchar> > &/*masks*/) { }
void apply(int /*index*/, Point /*corner*/, InputOutputArray /*image*/, InputArray /*mask*/) { }
};
/** @brief Exposure compensator which tries to remove exposure related artifacts by adjusting image
intensities, see @cite BL07 and @cite WJ10 for details.
*/
class CV_EXPORTS GainCompensator : public ExposureCompensator
{
public:
void feed(const std::vector<Point> &corners, const std::vector<UMat> &images,
const std::vector<std::pair<UMat,uchar> > &masks);
void apply(int index, Point corner, InputOutputArray image, InputArray mask);
std::vector<double> gains() const;
private:
Mat_<double> gains_;
};
/** @brief Exposure compensator which tries to remove exposure related artifacts by adjusting image block
intensities, see @cite UES01 for details.
*/
class CV_EXPORTS BlocksGainCompensator : public ExposureCompensator
{
public:
BlocksGainCompensator(int bl_width = 32, int bl_height = 32)
: bl_width_(bl_width), bl_height_(bl_height) {}
void feed(const std::vector<Point> &corners, const std::vector<UMat> &images,
const std::vector<std::pair<UMat,uchar> > &masks);
void apply(int index, Point corner, InputOutputArray image, InputArray mask);
private:
int bl_width_, bl_height_;
std::vector<UMat> gain_maps_;
};
//! @}
} // namespace detail
} // namespace cv
#endif // __OPENCV_STITCHING_EXPOSURE_COMPENSATE_HPP__