117 lines
4.2 KiB
C++
117 lines
4.2 KiB
C++
/* This file is a part of plaYUVer project
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* Copyright (C) 2014-2017 by Luis Lucas (luisfrlucas@gmail.com)
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* Joao Carreira (jfmcarreira@gmail.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/**
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* \file InterFrameVariance.cpp
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* \brief Variance across several frames
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*/
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#include "InterFrameVariance.h"
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#include "lib/LibMemory.h"
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InterFrameVariance::InterFrameVariance()
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{
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/* Module Definition */
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m_iModuleAPI = MODULE_API_2; // Use API version 2 (recommended).
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// See this example for details on the functions prototype
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m_iModuleType = FRAME_PROCESSING_MODULE; // Apply module to the frames or to
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// the whole sequence.
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m_pchModuleCategory = "Measurements"; // Category (sub-menu)
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m_pchModuleName = "InterFrameVariance"; // Name
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m_pchModuleTooltip = "Measure the variance across several frames";
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m_uiNumberOfFrames = MODULE_REQUIRES_SEVERAL_FRAMES; // Number of Frames required (This module
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// allows a variable number of inputs)
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m_uiModuleRequirements = MODULE_REQUIRES_NEW_WINDOW; // Module requirements
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// (check
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// PlaYUVerModulesIf.h).
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// Several requirements should be "or" between each others.
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m_pcFrameVariance = NULL;
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}
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Bool InterFrameVariance::create( std::vector<PlaYUVerFrame*> apcFrameList )
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{
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m_uiNumberOfFrames = Module_NumberOfFrames( apcFrameList.size() );
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_BASIC_MODULE_API_2_CHECK_
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for( UInt i = 1; i < apcFrameList.size(); i++ )
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if( !apcFrameList[i]->haveSameFmt( apcFrameList[0], PlaYUVerFrame::MATCH_COLOR_SPACE |
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PlaYUVerFrame::MATCH_RESOLUTION |
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PlaYUVerFrame::MATCH_BITS ) )
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return false;
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m_pcFrameVariance = new PlaYUVerFrame( apcFrameList[0]->getWidth(), apcFrameList[0]->getHeight(),
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PlaYUVerFrame::GRAY, 8 );
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getMem2D( &m_pVariance, apcFrameList[0]->getHeight(), apcFrameList[0]->getWidth() );
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return true;
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}
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PlaYUVerFrame* InterFrameVariance::process( std::vector<PlaYUVerFrame*> apcFrameList )
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{
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Int numFrames = apcFrameList.size();
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Pel** pInput = new Pel*[numFrames];
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Pel* pOutputPelYUV = m_pcFrameVariance->getPelBufferYUV()[0][0];
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for( Int i = 0; i < numFrames; i++ )
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{
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pInput[i] = apcFrameList[i]->getPelBufferYUV()[0][0];
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}
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Double maxVariance = 0;
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for( UInt y = 0; y < m_pcFrameVariance->getHeight(); y++ )
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for( UInt x = 0; x < m_pcFrameVariance->getWidth(); x++ )
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{
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Int sum = 0;
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Int v = 0;
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m_pVariance[y][x] = 0;
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for( Int i = 0; i < numFrames; i++ )
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{
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v = *pInput[i]++;
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sum += v;
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m_pVariance[y][x] += v * v;
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}
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// Final result of the variance for one block
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m_pVariance[y][x] -= Double( sum * sum ) / Double( numFrames );
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m_pVariance[y][x] /= Double( numFrames );
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if( m_pVariance[y][x] > maxVariance )
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maxVariance = m_pVariance[y][x];
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}
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for( UInt y = 0; y < m_pcFrameVariance->getHeight(); y++ )
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for( UInt x = 0; x < m_pcFrameVariance->getWidth(); x++ )
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{
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*pOutputPelYUV++ = m_pVariance[y][x] * 255 / maxVariance;
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}
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delete[] pInput;
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return m_pcFrameVariance;
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}
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Void InterFrameVariance::destroy()
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{
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if( m_pVariance )
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freeMem2D( m_pVariance );
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m_pVariance = NULL;
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if( m_pcFrameVariance )
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delete m_pcFrameVariance;
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m_pcFrameVariance = NULL;
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}
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