blobtrackgen1.cpp

Program use openCV to demo edge detection (algorithm Gradient).

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#include "_cvaux.h"

typedef struct DefBlobTrack
{
    CvBlob      blob;
    CvBlobSeq*  pSeq;
    int         FrameBegin;
    int         FrameLast;
    int         Saved; /* flag */
}DefBlobTrack;


static void SaveTrack(DefBlobTrack* pTrack, char* pFileName, int norm = 0)
{/* save blob track */
    int         j;
    FILE*       out = NULL;
    CvBlobSeq*  pS = pTrack->pSeq;
    CvBlob*     pB0 = pS?pS->GetBlob(0):NULL;

    if(pFileName == NULL) return;
    if(pTrack == NULL) return;

    out = fopen(pFileName,"at");
    if(out == NULL)
    {
        printf("Warning! Can not open %s file for track output\n",pFileName);
        return;
    }

    fprintf(out,"%d",pTrack->FrameBegin);
    
    if(pS)for(j=0;j<pS->GetBlobNum();++j)
    {
        CvBlob* pB = pS->GetBlob(j);
        
        fprintf(out,", %.1f, %.1f", CV_BLOB_X(pB),CV_BLOB_Y(pB));
        if(CV_BLOB_WX(pB0)>0)
            fprintf(out,", %.2f",CV_BLOB_WX(pB)/(norm?CV_BLOB_WX(pB0):1));
        if(CV_BLOB_WY(pB0)>0)
            fprintf(out,", %.2f",CV_BLOB_WY(pB)/(norm?CV_BLOB_WY(pB0):1));
    }
    fprintf(out,"\n");
    fclose(out);
    pTrack->Saved = 1;
}/* save blob track */

class CvBlobTrackGen1:public CvBlobTrackGen
{

public:
    CvBlobTrackGen1(int BlobSizeNorm = 0):m_TrackList(sizeof(DefBlobTrack))
    {
        m_BlobSizeNorm = BlobSizeNorm;
        m_Frame = 0;
        m_pFileName = NULL;
    };
    ~CvBlobTrackGen1()
    {
        int i;
        for(i=m_TrackList.GetBlobNum();i>0;--i)
        {
            DefBlobTrack* pTrack = (DefBlobTrack*)m_TrackList.GetBlob(i-1);
            if(!pTrack->Saved)
            {/* save track */
                SaveTrack(pTrack, m_pFileName, m_BlobSizeNorm);
            }/* save track */

            /* delete sequence */
            delete pTrack->pSeq;
            pTrack->pSeq = NULL;
        }/* check next track */
    }/* destructor */

    void    SetFileName(char* pFileName){m_pFileName = pFileName;};
    void    AddBlob(CvBlob* pBlob)
    {
        DefBlobTrack* pTrack = (DefBlobTrack*)m_TrackList.GetBlobByID(CV_BLOB_ID(pBlob));
        if(pTrack==NULL)
        {/* add new track */
            DefBlobTrack    Track;
            Track.blob = pBlob[0];
            Track.FrameBegin = m_Frame;
            Track.pSeq = new CvBlobSeq;
            Track.Saved = 0;
            m_TrackList.AddBlob((CvBlob*)&Track);
            pTrack = (DefBlobTrack*)m_TrackList.GetBlobByID(CV_BLOB_ID(pBlob));
        }/* add new track */

        assert(pTrack);
        pTrack->FrameLast = m_Frame;
        assert(pTrack->pSeq);
        pTrack->pSeq->AddBlob(pBlob);
    };
    void    Process(IplImage* /*pImg*/ = NULL, IplImage* /*pFG*/ = NULL)
    {
        int i;
        for(i=m_TrackList.GetBlobNum();i>0;--i)
        {
            DefBlobTrack* pTrack = (DefBlobTrack*)m_TrackList.GetBlob(i-1);
            if(pTrack->FrameLast < m_Frame && !pTrack->Saved)
            {/* save track */
                SaveTrack(pTrack, m_pFileName, m_BlobSizeNorm);
                if(pTrack->Saved)
                {   /* delete sequence */
                    delete pTrack->pSeq;
                    pTrack->pSeq = NULL;
                    m_TrackList.DelBlob(i-1);
                }
            }/* save track */
        }/* check next track */
        m_Frame++;
    }
    void Release()
    {
        delete this;
    }
protected:
    int         m_Frame;
    char*       m_pFileName;
    CvBlobSeq   m_TrackList;
    int         m_BlobSizeNorm;
}; /* class CvBlobTrackGen1 */


CvBlobTrackGen* cvCreateModuleBlobTrackGen1()
{
    return (CvBlobTrackGen*) new CvBlobTrackGen1(0);
}