+++ /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
-// For Open Source Computer Vision Library
-//
-// 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 "_cv.h"
-
-
-/*F///////////////////////////////////////////////////////////////////////////////////////
-// Name: cvMeanShift
-// Purpose: MeanShift algorithm
-// Context:
-// Parameters:
-// imgProb - 2D object probability distribution
-// windowIn - CvRect of CAMSHIFT Window intial size
-// numIters - If CAMSHIFT iterates this many times, stop
-// windowOut - Location, height and width of converged CAMSHIFT window
-// len - If != NULL, return equivalent len
-// width - If != NULL, return equivalent width
-// itersUsed - Returns number of iterations CAMSHIFT took to converge
-// Returns:
-// The function itself returns the area found
-// Notes:
-//F*/
-CV_IMPL int
-cvMeanShift( const void* imgProb, CvRect windowIn,
- CvTermCriteria criteria, CvConnectedComp* comp )
-{
- CvMoments moments;
- int i = 0, eps;
- CvMat stub, *mat = (CvMat*)imgProb;
- CvMat cur_win;
- CvRect cur_rect = windowIn;
-
- CV_FUNCNAME( "cvMeanShift" );
-
- if( comp )
- comp->rect = windowIn;
-
- moments.m00 = moments.m10 = moments.m01 = 0;
-
- __BEGIN__;
-
- CV_CALL( mat = cvGetMat( mat, &stub ));
-
- if( CV_MAT_CN( mat->type ) > 1 )
- CV_ERROR( CV_BadNumChannels, cvUnsupportedFormat );
-
- if( windowIn.height <= 0 || windowIn.width <= 0 )
- CV_ERROR( CV_StsBadArg, "Input window has non-positive sizes" );
-
- if( windowIn.x < 0 || windowIn.x + windowIn.width > mat->cols ||
- windowIn.y < 0 || windowIn.y + windowIn.height > mat->rows )
- CV_ERROR( CV_StsBadArg, "Initial window is not inside the image ROI" );
-
- CV_CALL( criteria = cvCheckTermCriteria( criteria, 1., 100 ));
-
- eps = cvRound( criteria.epsilon * criteria.epsilon );
-
- for( i = 0; i < criteria.max_iter; i++ )
- {
- int dx, dy, nx, ny;
- double inv_m00;
-
- CV_CALL( cvGetSubRect( mat, &cur_win, cur_rect ));
- CV_CALL( cvMoments( &cur_win, &moments ));
-
- /* Calculating center of mass */
- if( fabs(moments.m00) < DBL_EPSILON )
- break;
-
- inv_m00 = moments.inv_sqrt_m00*moments.inv_sqrt_m00;
- dx = cvRound( moments.m10 * inv_m00 - windowIn.width*0.5 );
- dy = cvRound( moments.m01 * inv_m00 - windowIn.height*0.5 );
-
- nx = cur_rect.x + dx;
- ny = cur_rect.y + dy;
-
- if( nx < 0 )
- nx = 0;
- else if( nx + cur_rect.width > mat->cols )
- nx = mat->cols - cur_rect.width;
-
- if( ny < 0 )
- ny = 0;
- else if( ny + cur_rect.height > mat->rows )
- ny = mat->rows - cur_rect.height;
-
- dx = nx - cur_rect.x;
- dy = ny - cur_rect.y;
- cur_rect.x = nx;
- cur_rect.y = ny;
-
- /* Check for coverage centers mass & window */
- if( dx*dx + dy*dy < eps )
- break;
- }
-
- __END__;
-
- if( comp )
- {
- comp->rect = cur_rect;
- comp->area = (float)moments.m00;
- }
-
- return i;
-}
-
-
-/*F///////////////////////////////////////////////////////////////////////////////////////
-// Name: cvCamShift
-// Purpose: CAMSHIFT algorithm
-// Context:
-// Parameters:
-// imgProb - 2D object probability distribution
-// windowIn - CvRect of CAMSHIFT Window intial size
-// criteria - criteria of stop finding window
-// windowOut - Location, height and width of converged CAMSHIFT window
-// orientation - If != NULL, return distribution orientation
-// len - If != NULL, return equivalent len
-// width - If != NULL, return equivalent width
-// area - sum of all elements in result window
-// itersUsed - Returns number of iterations CAMSHIFT took to converge
-// Returns:
-// The function itself returns the area found
-// Notes:
-//F*/
-CV_IMPL int
-cvCamShift( const void* imgProb, CvRect windowIn,
- CvTermCriteria criteria,
- CvConnectedComp* _comp,
- CvBox2D* box )
-{
- const int TOLERANCE = 10;
- CvMoments moments;
- double m00 = 0, m10, m01, mu20, mu11, mu02, inv_m00;
- double a, b, c, xc, yc;
- double rotate_a, rotate_c;
- double theta = 0, square;
- double cs, sn;
- double length = 0, width = 0;
- int itersUsed = 0;
- CvConnectedComp comp;
- CvMat cur_win, stub, *mat = (CvMat*)imgProb;
-
- CV_FUNCNAME( "cvCamShift" );
-
- comp.rect = windowIn;
-
- __BEGIN__;
-
- CV_CALL( mat = cvGetMat( mat, &stub ));
-
- CV_CALL( itersUsed = cvMeanShift( mat, windowIn, criteria, &comp ));
- windowIn = comp.rect;
-
- windowIn.x -= TOLERANCE;
- if( windowIn.x < 0 )
- windowIn.x = 0;
-
- windowIn.y -= TOLERANCE;
- if( windowIn.y < 0 )
- windowIn.y = 0;
-
- windowIn.width += 2 * TOLERANCE;
- if( windowIn.x + windowIn.width > mat->width )
- windowIn.width = mat->width - windowIn.x;
-
- windowIn.height += 2 * TOLERANCE;
- if( windowIn.y + windowIn.height > mat->height )
- windowIn.height = mat->height - windowIn.y;
-
- CV_CALL( cvGetSubRect( mat, &cur_win, windowIn ));
-
- /* Calculating moments in new center mass */
- CV_CALL( cvMoments( &cur_win, &moments ));
-
- m00 = moments.m00;
- m10 = moments.m10;
- m01 = moments.m01;
- mu11 = moments.mu11;
- mu20 = moments.mu20;
- mu02 = moments.mu02;
-
- if( fabs(m00) < DBL_EPSILON )
- EXIT;
-
- inv_m00 = 1. / m00;
- xc = cvRound( m10 * inv_m00 + windowIn.x );
- yc = cvRound( m01 * inv_m00 + windowIn.y );
- a = mu20 * inv_m00;
- b = mu11 * inv_m00;
- c = mu02 * inv_m00;
-
- /* Calculating width & height */
- square = sqrt( 4 * b * b + (a - c) * (a - c) );
-
- /* Calculating orientation */
- theta = atan2( 2 * b, a - c + square );
-
- /* Calculating width & length of figure */
- cs = cos( theta );
- sn = sin( theta );
-
- rotate_a = cs * cs * mu20 + 2 * cs * sn * mu11 + sn * sn * mu02;
- rotate_c = sn * sn * mu20 - 2 * cs * sn * mu11 + cs * cs * mu02;
- length = sqrt( rotate_a * inv_m00 ) * 4;
- width = sqrt( rotate_c * inv_m00 ) * 4;
-
- /* In case, when tetta is 0 or 1.57... the Length & Width may be exchanged */
- if( length < width )
- {
- double t;
-
- CV_SWAP( length, width, t );
- CV_SWAP( cs, sn, t );
- theta = CV_PI*0.5 - theta;
- }
-
- /* Saving results */
- if( _comp || box )
- {
- int t0, t1;
- int _xc = cvRound( xc );
- int _yc = cvRound( yc );
-
- t0 = cvRound( fabs( length * cs ));
- t1 = cvRound( fabs( width * sn ));
-
- t0 = MAX( t0, t1 ) + 2;
- comp.rect.width = MIN( t0, (mat->width - _xc) * 2 );
-
- t0 = cvRound( fabs( length * sn ));
- t1 = cvRound( fabs( width * cs ));
-
- t0 = MAX( t0, t1 ) + 2;
- comp.rect.height = MIN( t0, (mat->height - _yc) * 2 );
-
- comp.rect.x = MAX( 0, _xc - comp.rect.width / 2 );
- comp.rect.y = MAX( 0, _yc - comp.rect.height / 2 );
-
- comp.rect.width = MIN( mat->width - comp.rect.x, comp.rect.width );
- comp.rect.height = MIN( mat->height - comp.rect.y, comp.rect.height );
- comp.area = (float) m00;
- }
-
- __END__;
-
- if( _comp )
- *_comp = comp;
-
- if( box )
- {
- box->size.height = (float)length;
- box->size.width = (float)width;
- box->angle = (float)(theta*180./CV_PI);
- box->center = cvPoint2D32f( comp.rect.x + comp.rect.width*0.5f,
- comp.rect.y + comp.rect.height*0.5f);
- }
-
- return itersUsed;
-}
-
-/* End of file. */
projects / opencv / blobdiff