97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
// This file is part of OpenCV project.
|
|
// It is subject to the license terms in the LICENSE file found in the top-level directory
|
|
// of this distribution and at http://opencv.org/license.html.
|
|
|
|
#ifndef OPENCV_QUALITY_QUALITYSSIM_HPP
|
|
#define OPENCV_QUALITY_QUALITYSSIM_HPP
|
|
|
|
#include "qualitybase.hpp"
|
|
|
|
namespace cv
|
|
{
|
|
namespace quality
|
|
{
|
|
|
|
/**
|
|
@brief Full reference structural similarity algorithm https://en.wikipedia.org/wiki/Structural_similarity
|
|
*/
|
|
class CV_EXPORTS_W QualitySSIM
|
|
: public QualityBase {
|
|
public:
|
|
|
|
/**
|
|
@brief Computes SSIM
|
|
@param cmp Comparison image
|
|
@returns cv::Scalar with per-channel quality values. Values range from 0 (worst) to 1 (best)
|
|
*/
|
|
CV_WRAP cv::Scalar compute( InputArray cmp ) CV_OVERRIDE;
|
|
|
|
/** @brief Implements Algorithm::empty() */
|
|
CV_WRAP bool empty() const CV_OVERRIDE { return _refImgData.empty() && QualityBase::empty(); }
|
|
|
|
/** @brief Implements Algorithm::clear() */
|
|
CV_WRAP void clear() CV_OVERRIDE { _refImgData = _mat_data(); QualityBase::clear(); }
|
|
|
|
/**
|
|
@brief Create an object which calculates quality
|
|
@param ref input image to use as the reference image for comparison
|
|
*/
|
|
CV_WRAP static Ptr<QualitySSIM> create( InputArray ref );
|
|
|
|
/**
|
|
@brief static method for computing quality
|
|
@param ref reference image
|
|
@param cmp comparison image
|
|
@param qualityMap output quality map, or cv::noArray()
|
|
@returns cv::Scalar with per-channel quality values. Values range from 0 (worst) to 1 (best)
|
|
*/
|
|
CV_WRAP static cv::Scalar compute( InputArray ref, InputArray cmp, OutputArray qualityMap );
|
|
|
|
protected:
|
|
|
|
// holds computed values for a mat
|
|
struct _mat_data
|
|
{
|
|
// internal mat type
|
|
using mat_type = QualityBase::_mat_type;
|
|
|
|
mat_type
|
|
I
|
|
, I_2
|
|
, mu
|
|
, mu_2
|
|
, sigma_2
|
|
;
|
|
|
|
// allow default construction
|
|
_mat_data() = default;
|
|
|
|
// construct from mat_type
|
|
_mat_data(const mat_type&);
|
|
|
|
// construct from inputarray
|
|
_mat_data(InputArray);
|
|
|
|
// return flag if this is empty
|
|
bool empty() const { return I.empty() && I_2.empty() && mu.empty() && mu_2.empty() && sigma_2.empty(); }
|
|
|
|
// computes ssim and quality map for single frame
|
|
static std::pair<cv::Scalar, mat_type> compute(const _mat_data& lhs, const _mat_data& rhs);
|
|
|
|
}; // mat_data
|
|
|
|
/** @brief Reference image data */
|
|
_mat_data _refImgData;
|
|
|
|
/**
|
|
@brief Constructor
|
|
@param refImgData reference image, converted to internal type
|
|
*/
|
|
QualitySSIM( _mat_data refImgData )
|
|
: _refImgData( std::move(refImgData) )
|
|
{}
|
|
|
|
}; // QualitySSIM
|
|
} // quality
|
|
} // cv
|
|
#endif |