1 /*M///////////////////////////////////////////////////////////////////////////////////////
3 // IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
5 // By downloading, copying, installing or using the software you agree to this license.
6 // If you do not agree to this license, do not download, install,
7 // copy or use the software.
10 // Intel License Agreement
12 // Copyright (C) 2000, Intel Corporation, all rights reserved.
13 // Third party copyrights are property of their respective owners.
15 // Redistribution and use in source and binary forms, with or without modification,
16 // are permitted provided that the following conditions are met:
18 // * Redistribution's of source code must retain the above copyright notice,
19 // this list of conditions and the following disclaimer.
21 // * Redistribution's in binary form must reproduce the above copyright notice,
22 // this list of conditions and the following disclaimer in the documentation
23 // and/or other materials provided with the distribution.
25 // * The name of Intel Corporation may not be used to endorse or promote products
26 // derived from this software without specific prior written permission.
28 // This software is provided by the copyright holders and contributors "as is" and
29 // any express or implied warranties, including, but not limited to, the implied
30 // warranties of merchantability and fitness for a particular purpose are disclaimed.
31 // In no event shall the Intel Corporation or contributors be liable for any direct,
32 // indirect, incidental, special, exemplary, or consequential damages
33 // (including, but not limited to, procurement of substitute goods or services;
34 // loss of use, data, or profits; or business interruption) however caused
35 // and on any theory of liability, whether in contract, strict liability,
36 // or tort (including negligence or otherwise) arising in any way out of
37 // the use of this software, even if advised of the possibility of such damage.
43 /*======================= TIME AVERAGING FILTER =========================*/
45 class CvBlobTrackPostProcTimeAver:public CvBlobTrackPostProcOne
50 CvBlob m_pBlobs[TIME_WND];
51 float m_Weights[TIME_WND];
55 CvBlobTrackPostProcTimeAver( int KernelType = 0)
59 for(i=0;i<TIME_WND;++i)
64 m_Weights[i] = (float)exp((-2.3*i)/(TIME_WND-1)); /* last weight is 0.1 of first weight */
68 SetModuleName("TimeAver");
71 ~CvBlobTrackPostProcTimeAver(){};
73 CvBlob* Process(CvBlob* pBlob)
77 int index = m_Frame % TIME_WND;
78 int size = MIN((m_Frame+1), TIME_WND);
79 m_pBlobs[index] = pBlob[0];
80 m_Blob.x = m_Blob.y = m_Blob.w = m_Blob.h = 0;
84 float W = m_Weights[i];
85 int index = (m_Frame - i + TIME_WND) % TIME_WND;
86 m_Blob.x += W*m_pBlobs[index].x;
87 m_Blob.y += W*m_pBlobs[index].y;
88 m_Blob.w += W*m_pBlobs[index].w;
89 m_Blob.h += W*m_pBlobs[index].h;
107 }; /* class CvBlobTrackPostProcTimeAver */
109 CvBlobTrackPostProcOne* cvCreateModuleBlobTrackPostProcTimeAverRectOne()
111 return (CvBlobTrackPostProcOne*) new CvBlobTrackPostProcTimeAver(0);
114 CvBlobTrackPostProcOne* cvCreateModuleBlobTrackPostProcTimeAverExpOne()
116 return (CvBlobTrackPostProcOne*) new CvBlobTrackPostProcTimeAver(1);
119 CvBlobTrackPostProc* cvCreateModuleBlobTrackPostProcTimeAverRect()
121 return cvCreateBlobTrackPostProcList(cvCreateModuleBlobTrackPostProcTimeAverRectOne);
124 CvBlobTrackPostProc* cvCreateModuleBlobTrackPostProcTimeAverExp()
126 return cvCreateBlobTrackPostProcList(cvCreateModuleBlobTrackPostProcTimeAverExpOne);
128 /*======================= KALMAN FILTER =========================*/