--- /dev/null
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+// By downloading, copying, installing or using the software you agree to this license.
+// If you do not agree to this license, do not download, install,
+// copy or use the software.
+//
+//
+// Intel License Agreement
+//
+// Copyright (C) 2000, Intel Corporation, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+// * Redistribution's of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// * Redistribution's in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
+// and/or other materials provided with the distribution.
+//
+// * The name of Intel Corporation may not be used to endorse or promote products
+// derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "_cvaux.h"
+
+CvBGCodeBookModel* cvCreateBGCodeBookModel()
+{
+ CvBGCodeBookModel* model = (CvBGCodeBookModel*)cvAlloc( sizeof(*model) );
+ memset( model, 0, sizeof(*model) );
+ model->cbBounds[0] = model->cbBounds[1] = model->cbBounds[2] = 10;
+ model->modMin[0] = 3;
+ model->modMax[0] = 10;
+ model->modMin[1] = model->modMin[2] = 1;
+ model->modMax[1] = model->modMax[2] = 1;
+ model->storage = cvCreateMemStorage();
+
+ return model;
+}
+
+void cvReleaseBGCodeBookModel( CvBGCodeBookModel** model )
+{
+ if( model && *model )
+ {
+ cvReleaseMemStorage( &(*model)->storage );
+ memset( *model, 0, sizeof(**model) );
+ cvFree( model );
+ }
+}
+
+static uchar satTab8u[768];
+#undef SAT_8U
+#define SAT_8U(x) satTab8u[(x) + 255]
+
+static void icvInitSatTab()
+{
+ static int initialized = 0;
+ if( !initialized )
+ {
+ for( int i = 0; i < 768; i++ )
+ {
+ int v = i - 255;
+ satTab8u[i] = (uchar)(v < 0 ? 0 : v > 255 ? 255 : v);
+ }
+ initialized = 1;
+ }
+}
+
+
+void cvBGCodeBookUpdate( CvBGCodeBookModel* model, const CvArr* _image,
+ CvRect roi, const CvArr* _mask )
+{
+ CV_FUNCNAME( "cvBGCodeBookUpdate" );
+
+ __BEGIN__;
+
+ CvMat stub, *image = cvGetMat( _image, &stub );
+ CvMat mstub, *mask = _mask ? cvGetMat( _mask, &mstub ) : 0;
+ int i, x, y, T;
+ int nblocks;
+ uchar cb0, cb1, cb2;
+ CvBGCodeBookElem* freeList;
+
+ CV_ASSERT( model && CV_MAT_TYPE(image->type) == CV_8UC3 &&
+ (!mask || (CV_IS_MASK_ARR(mask) && CV_ARE_SIZES_EQ(image, mask))) );
+
+ if( roi.x == 0 && roi.y == 0 && roi.width == 0 && roi.height == 0 )
+ {
+ roi.width = image->cols;
+ roi.height = image->rows;
+ }
+ else
+ CV_ASSERT( (unsigned)roi.x < (unsigned)image->cols &&
+ (unsigned)roi.y < (unsigned)image->rows &&
+ roi.width >= 0 && roi.height >= 0 &&
+ roi.x + roi.width <= image->cols &&
+ roi.y + roi.height <= image->rows );
+
+ if( image->cols != model->size.width || image->rows != model->size.height )
+ {
+ cvClearMemStorage( model->storage );
+ model->freeList = 0;
+ cvFree( &model->cbmap );
+ int bufSz = image->cols*image->rows*sizeof(model->cbmap[0]);
+ model->cbmap = (CvBGCodeBookElem**)cvAlloc(bufSz);
+ memset( model->cbmap, 0, bufSz );
+ model->size = cvSize(image->cols, image->rows);
+ }
+
+ icvInitSatTab();
+
+ cb0 = model->cbBounds[0];
+ cb1 = model->cbBounds[1];
+ cb2 = model->cbBounds[2];
+
+ T = ++model->t;
+ freeList = model->freeList;
+ nblocks = (int)((model->storage->block_size - sizeof(CvMemBlock))/sizeof(*freeList));
+ nblocks = MIN( nblocks, 1024 );
+ CV_ASSERT( nblocks > 0 );
+
+ for( y = 0; y < roi.height; y++ )
+ {
+ const uchar* p = image->data.ptr + image->step*(y + roi.y) + roi.x*3;
+ const uchar* m = mask ? mask->data.ptr + mask->step*(y + roi.y) + roi.x : 0;
+ CvBGCodeBookElem** cb = model->cbmap + image->cols*(y + roi.y) + roi.x;
+
+ for( x = 0; x < roi.width; x++, p += 3, cb++ )
+ {
+ CvBGCodeBookElem *e, *found = 0;
+ uchar p0, p1, p2, l0, l1, l2, h0, h1, h2;
+ int negRun;
+
+ if( m && m[x] == 0 )
+ continue;
+
+ p0 = p[0]; p1 = p[1]; p2 = p[2];
+ l0 = SAT_8U(p0 - cb0); l1 = SAT_8U(p1 - cb1); l2 = SAT_8U(p2 - cb2);
+ h0 = SAT_8U(p0 + cb0); h1 = SAT_8U(p1 + cb1); h2 = SAT_8U(p2 + cb2);
+
+ for( e = *cb; e != 0; e = e->next )
+ {
+ if( e->learnMin[0] <= p0 && p0 <= e->learnMax[0] &&
+ e->learnMin[1] <= p1 && p1 <= e->learnMax[1] &&
+ e->learnMin[2] <= p2 && p2 <= e->learnMax[2] )
+ {
+ e->tLastUpdate = T;
+ e->boxMin[0] = MIN(e->boxMin[0], p0);
+ e->boxMax[0] = MAX(e->boxMax[0], p0);
+ e->boxMin[1] = MIN(e->boxMin[1], p1);
+ e->boxMax[1] = MAX(e->boxMax[1], p1);
+ e->boxMin[2] = MIN(e->boxMin[2], p2);
+ e->boxMax[2] = MAX(e->boxMax[2], p2);
+
+ // no need to use SAT_8U for updated learnMin[i] & learnMax[i] here,
+ // as the bounding li & hi are already within 0..255.
+ if( e->learnMin[0] > l0 ) e->learnMin[0]--;
+ if( e->learnMax[0] < h0 ) e->learnMax[0]++;
+ if( e->learnMin[1] > l1 ) e->learnMin[1]--;
+ if( e->learnMax[1] < h1 ) e->learnMax[1]++;
+ if( e->learnMin[2] > l2 ) e->learnMin[2]--;
+ if( e->learnMax[2] < h2 ) e->learnMax[2]++;
+
+ found = e;
+ break;
+ }
+ negRun = T - e->tLastUpdate;
+ e->stale = MAX( e->stale, negRun );
+ }
+
+ for( ; e != 0; e = e->next )
+ {
+ negRun = T - e->tLastUpdate;
+ e->stale = MAX( e->stale, negRun );
+ }
+
+ if( !found )
+ {
+ if( !freeList )
+ {
+ freeList = (CvBGCodeBookElem*)cvMemStorageAlloc(model->storage,
+ nblocks*sizeof(*freeList));
+ for( i = 0; i < nblocks-1; i++ )
+ freeList[i].next = &freeList[i+1];
+ freeList[nblocks-1].next = 0;
+ }
+ e = freeList;
+ freeList = freeList->next;
+
+ e->learnMin[0] = l0; e->learnMax[0] = h0;
+ e->learnMin[1] = l1; e->learnMax[1] = h1;
+ e->learnMin[2] = l2; e->learnMax[2] = h2;
+ e->boxMin[0] = e->boxMax[0] = p0;
+ e->boxMin[1] = e->boxMax[1] = p1;
+ e->boxMin[2] = e->boxMax[2] = p2;
+ e->tLastUpdate = T;
+ e->stale = 0;
+ e->next = *cb;
+ *cb = e;
+ }
+ }
+ }
+
+ model->freeList = freeList;
+
+ __END__;
+}
+
+
+int cvBGCodeBookDiff( const CvBGCodeBookModel* model, const CvArr* _image,
+ CvArr* _fgmask, CvRect roi )
+{
+ int maskCount = -1;
+
+ CV_FUNCNAME( "cvBGCodeBookDiff" );
+
+ __BEGIN__;
+
+ CvMat stub, *image = cvGetMat( _image, &stub );
+ CvMat mstub, *mask = cvGetMat( _fgmask, &mstub );
+ int x, y;
+ uchar m0, m1, m2, M0, M1, M2;
+
+ CV_ASSERT( model && CV_MAT_TYPE(image->type) == CV_8UC3 &&
+ image->cols == model->size.width && image->rows == model->size.height &&
+ CV_IS_MASK_ARR(mask) && CV_ARE_SIZES_EQ(image, mask) );
+
+ if( roi.x == 0 && roi.y == 0 && roi.width == 0 && roi.height == 0 )
+ {
+ roi.width = image->cols;
+ roi.height = image->rows;
+ }
+ else
+ CV_ASSERT( (unsigned)roi.x < (unsigned)image->cols &&
+ (unsigned)roi.y < (unsigned)image->rows &&
+ roi.width >= 0 && roi.height >= 0 &&
+ roi.x + roi.width <= image->cols &&
+ roi.y + roi.height <= image->rows );
+
+ m0 = model->modMin[0]; M0 = model->modMax[0];
+ m1 = model->modMin[1]; M1 = model->modMax[1];
+ m2 = model->modMin[2]; M2 = model->modMax[2];
+
+ maskCount = roi.height*roi.width;
+ for( y = 0; y < roi.height; y++ )
+ {
+ const uchar* p = image->data.ptr + image->step*(y + roi.y) + roi.x*3;
+ uchar* m = mask->data.ptr + mask->step*(y + roi.y) + roi.x;
+ CvBGCodeBookElem** cb = model->cbmap + image->cols*(y + roi.y) + roi.x;
+
+ for( x = 0; x < roi.width; x++, p += 3, cb++ )
+ {
+ CvBGCodeBookElem *e;
+ uchar p0 = p[0], p1 = p[1], p2 = p[2];
+ int l0 = p0 + m0, l1 = p1 + m1, l2 = p2 + m2;
+ int h0 = p0 - M0, h1 = p1 - M1, h2 = p2 - M2;
+ m[x] = (uchar)255;
+
+ for( e = *cb; e != 0; e = e->next )
+ {
+ if( e->boxMin[0] <= l0 && h0 <= e->boxMax[0] &&
+ e->boxMin[1] <= l1 && h1 <= e->boxMax[1] &&
+ e->boxMin[2] <= l2 && h2 <= e->boxMax[2] )
+ {
+ m[x] = 0;
+ maskCount--;
+ break;
+ }
+ }
+ }
+ }
+
+ __END__;
+
+ return maskCount;
+}
+
+void cvBGCodeBookClearStale( CvBGCodeBookModel* model, int staleThresh,
+ CvRect roi, const CvArr* _mask )
+{
+ CV_FUNCNAME( "cvBGCodeBookClearStale" );
+
+ __BEGIN__;
+
+ CvMat mstub, *mask = _mask ? cvGetMat( _mask, &mstub ) : 0;
+ int x, y, T;
+ CvBGCodeBookElem* freeList;
+
+ CV_ASSERT( model && (!mask || (CV_IS_MASK_ARR(mask) &&
+ mask->cols == model->size.width && mask->rows == model->size.height)) );
+
+ if( roi.x == 0 && roi.y == 0 && roi.width == 0 && roi.height == 0 )
+ {
+ roi.width = model->size.width;
+ roi.height = model->size.height;
+ }
+ else
+ CV_ASSERT( (unsigned)roi.x < (unsigned)mask->cols &&
+ (unsigned)roi.y < (unsigned)mask->rows &&
+ roi.width >= 0 && roi.height >= 0 &&
+ roi.x + roi.width <= mask->cols &&
+ roi.y + roi.height <= mask->rows );
+
+ icvInitSatTab();
+ freeList = model->freeList;
+ T = model->t;
+
+ for( y = 0; y < roi.height; y++ )
+ {
+ const uchar* m = mask ? mask->data.ptr + mask->step*(y + roi.y) + roi.x : 0;
+ CvBGCodeBookElem** cb = model->cbmap + model->size.width*(y + roi.y) + roi.x;
+
+ for( x = 0; x < roi.width; x++, cb++ )
+ {
+ CvBGCodeBookElem *e, first, *prev = &first;
+
+ if( m && m[x] == 0 )
+ continue;
+
+ for( first.next = e = *cb; e != 0; e = prev->next )
+ {
+ if( e->stale > staleThresh )
+ {
+ prev->next = e->next;
+ e->next = freeList;
+ freeList = e;
+ }
+ else
+ {
+ e->stale = 0;
+ e->tLastUpdate = T;
+ prev = e;
+ }
+ }
+
+ *cb = first.next;
+ }
+ }
+
+ model->freeList = freeList;
+
+ __END__;
+}
+
+/* End of file. */
+
projects / opencv / blobdiff