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129 lines
4.3 KiB
C++
129 lines
4.3 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// Intel License Agreement
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//
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// Copyright (C) 2000, Intel Corporation, all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of Intel Corporation may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#include "precomp.hpp"
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/*======================= TIME AVERAGING FILTER =========================*/
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#define TIME_WND 5
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class CvBlobTrackPostProcTimeAver:public CvBlobTrackPostProcOne
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{
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protected:
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CvBlob m_Blob;
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CvBlob m_pBlobs[TIME_WND];
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float m_Weights[TIME_WND];
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int m_Frame;
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public:
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CvBlobTrackPostProcTimeAver( int KernelType = 0)
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{
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int i;
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m_Frame = 0;
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for(i=0;i<TIME_WND;++i)
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{
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m_Weights[i] = 1;
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if(KernelType == 1)
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{
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m_Weights[i] = (float)exp((-2.3*i)/(TIME_WND-1)); /* last weight is 0.1 of first weight */
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}
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}
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SetModuleName("TimeAver");
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};
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~CvBlobTrackPostProcTimeAver(){};
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CvBlob* Process(CvBlob* pBlob)
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{
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float WSum = 0;
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int i;
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int idx = m_Frame % TIME_WND;
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int size = MIN((m_Frame+1), TIME_WND);
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m_pBlobs[idx] = pBlob[0];
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m_Blob.x = m_Blob.y = m_Blob.w = m_Blob.h = 0;
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for(i=0; i<size; ++i)
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{
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float W = m_Weights[i];
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int index = (m_Frame - i + TIME_WND) % TIME_WND;
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m_Blob.x += W*m_pBlobs[index].x;
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m_Blob.y += W*m_pBlobs[index].y;
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m_Blob.w += W*m_pBlobs[index].w;
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m_Blob.h += W*m_pBlobs[index].h;
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WSum += W;
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}
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assert(WSum>0);
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m_Blob.x /= WSum;
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m_Blob.y /= WSum;
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m_Blob.w /= WSum;
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m_Blob.h /= WSum;
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m_Frame++;
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return &m_Blob;
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};
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void Release()
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{
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delete this;
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}
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}; /* class CvBlobTrackPostProcTimeAver */
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static CvBlobTrackPostProcOne* cvCreateModuleBlobTrackPostProcTimeAverRectOne()
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{
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return (CvBlobTrackPostProcOne*) new CvBlobTrackPostProcTimeAver(0);
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}
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static CvBlobTrackPostProcOne* cvCreateModuleBlobTrackPostProcTimeAverExpOne()
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{
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return (CvBlobTrackPostProcOne*) new CvBlobTrackPostProcTimeAver(1);
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}
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CvBlobTrackPostProc* cvCreateModuleBlobTrackPostProcTimeAverRect()
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{
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return cvCreateBlobTrackPostProcList(cvCreateModuleBlobTrackPostProcTimeAverRectOne);
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}
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CvBlobTrackPostProc* cvCreateModuleBlobTrackPostProcTimeAverExp()
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{
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return cvCreateBlobTrackPostProcList(cvCreateModuleBlobTrackPostProcTimeAverExpOne);
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}
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/*======================= KALMAN FILTER =========================*/
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