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586 lines
18 KiB
C++
586 lines
18 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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// For Open Source Computer Vision Library
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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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typedef struct Seg
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{
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ushort y;
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ushort l;
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ushort r;
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ushort Prevl;
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ushort Prevr;
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short fl;
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}
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Seg;
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#define UP 1
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#define DOWN -1
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#define PUSH(Y,IL,IR,IPL,IPR,FL) { stack[StIn].y=(ushort)(Y); \
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stack[StIn].l=(ushort)(IL); \
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stack[StIn].r=(ushort)(IR); \
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stack[StIn].Prevl=(ushort)(IPL); \
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stack[StIn].Prevr=(ushort)(IPR); \
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stack[StIn].fl=(short)(FL); \
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StIn++; }
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#define POP(Y,IL,IR,IPL,IPR,FL) { StIn--; \
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Y=stack[StIn].y; \
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IL=stack[StIn].l; \
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IR=stack[StIn].r;\
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IPL=stack[StIn].Prevl; \
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IPR=stack[StIn].Prevr; \
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FL=stack[StIn].fl; }
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#define DIFF(p1,p2) ((unsigned)((p1)[0] - (p2)[0] + d_lw)<=Interval && \
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(unsigned)((p1)[1] - (p2)[1] + d_lw)<=Interval && \
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(unsigned)((p1)[2] - (p2)[2] + d_lw)<=Interval)
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/*#define DIFF(p1,p2) (CV_IABS((p1)[0] - (p2)[0]) + \
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CV_IABS((p1)[1] - (p2)[1]) + \
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CV_IABS((p1)[2] - (p2)[2]) <=Interval )*/
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static CvStatus
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icvSegmFloodFill_Stage1( uchar* pImage, int step,
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uchar* pMask, int maskStep,
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CvSize /*roi*/, CvPoint seed,
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int* newVal, int d_lw, int d_up,
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CvConnectedComp * region,
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void *pStack )
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{
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uchar* img = pImage + step * seed.y;
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uchar* mask = pMask + maskStep * (seed.y + 1);
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unsigned Interval = (unsigned) (d_up + d_lw);
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Seg *stack = (Seg*)pStack;
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int StIn = 0;
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int i, L, R;
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int area = 0;
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int sum[] = { 0, 0, 0 };
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int XMin, XMax, YMin = seed.y, YMax = seed.y;
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int val0[3];
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L = R = seed.x;
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img = pImage + seed.y*step;
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mask = pMask + seed.y*maskStep;
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mask[L] = 1;
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val0[0] = img[seed.x*3];
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val0[1] = img[seed.x*3 + 1];
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val0[2] = img[seed.x*3 + 2];
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while( DIFF( img + (R+1)*3, /*img + R*3*/val0 ) && !mask[R + 1] )
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mask[++R] = 2;
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while( DIFF( img + (L-1)*3, /*img + L*3*/val0 ) && !mask[L - 1] )
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mask[--L] = 2;
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XMax = R;
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XMin = L;
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PUSH( seed.y, L, R, R + 1, R, UP );
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while( StIn )
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{
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int k, YC, PL, PR, flag/*, curstep*/;
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POP( YC, L, R, PL, PR, flag );
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int data[][3] = { {-flag, L, R}, {flag, L, PL-1}, {flag,PR+1,R}};
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if( XMax < R )
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XMax = R;
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if( XMin > L )
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XMin = L;
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if( YMax < YC )
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YMax = YC;
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if( YMin > YC )
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YMin = YC;
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for( k = 0; k < 3; k++ )
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{
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flag = data[k][0];
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/*curstep = flag * step;*/
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img = pImage + (YC + flag) * step;
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mask = pMask + (YC + flag) * maskStep;
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int left = data[k][1];
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int right = data[k][2];
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for( i = left; i <= right; i++ )
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{
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if( !mask[i] && DIFF( img + i*3, /*img - curstep + i*3*/val0 ))
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{
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int j = i;
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mask[i] = 2;
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while( !mask[j - 1] && DIFF( img + (j - 1)*3, /*img + j*3*/val0 ))
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mask[--j] = 2;
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while( !mask[i + 1] &&
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(DIFF( img + (i+1)*3, /*img + i*3*/val0 ) ||
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(DIFF( img + (i+1)*3, /*img + (i+1)*3 - curstep*/val0) && i < R)))
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mask[++i] = 2;
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PUSH( YC + flag, j, i, L, R, -flag );
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i++;
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}
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}
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}
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img = pImage + YC * step;
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for( i = L; i <= R; i++ )
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{
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sum[0] += img[i*3];
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sum[1] += img[i*3 + 1];
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sum[2] += img[i*3 + 2];
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}
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area += R - L + 1;
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}
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region->area = area;
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region->rect.x = XMin;
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region->rect.y = YMin;
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region->rect.width = XMax - XMin + 1;
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region->rect.height = YMax - YMin + 1;
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region->value = cvScalarAll(0);
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{
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double inv_area = area ? 1./area : 0;
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newVal[0] = cvRound( sum[0] * inv_area );
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newVal[1] = cvRound( sum[1] * inv_area );
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newVal[2] = cvRound( sum[2] * inv_area );
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}
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return CV_NO_ERR;
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}
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#undef PUSH
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#undef POP
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#undef DIFF
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static CvStatus
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icvSegmFloodFill_Stage2( uchar* pImage, int step,
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uchar* pMask, int maskStep,
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CvSize /*roi*/, int* newVal,
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CvRect rect )
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{
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uchar* img = pImage + step * rect.y + rect.x * 3;
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uchar* mask = pMask + maskStep * rect.y + rect.x;
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uchar uv[] = { (uchar)newVal[0], (uchar)newVal[1], (uchar)newVal[2] };
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int x, y;
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for( y = 0; y < rect.height; y++, img += step, mask += maskStep )
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for( x = 0; x < rect.width; x++ )
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if( mask[x] == 2 )
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{
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mask[x] = 1;
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img[x*3] = uv[0];
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img[x*3+1] = uv[1];
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img[x*3+2] = uv[2];
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}
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return CV_OK;
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}
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#if 0
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static void color_derv( const CvArr* srcArr, CvArr* dstArr, int thresh )
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{
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static int tab[] = { 0, 2, 2, 1 };
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uchar *src = 0, *dst = 0;
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int dst_step, src_step;
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int x, y;
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CvSize size;
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cvGetRawData( srcArr, (uchar**)&src, &src_step, &size );
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cvGetRawData( dstArr, (uchar**)&dst, &dst_step, 0 );
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memset( dst, 0, size.width*sizeof(dst[0]));
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memset( (uchar*)dst + dst_step*(size.height-1), 0, size.width*sizeof(dst[0]));
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src += 3;
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#define CV_IABS(a) (((a) ^ ((a) < 0 ? -1 : 0)) - ((a) < 0 ? -1 : 0))
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for( y = 1; y < size.height - 1; y++ )
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{
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src += src_step;
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dst += dst_step;
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uchar* src0 = src;
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dst[0] = dst[size.width - 1] = 0;
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for( x = 1; x < size.width - 1; x++, src += 3 )
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{
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/*int d[3];
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int ad[3];
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int f0, f1;
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int val;*/
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int m[3];
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double val;
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//double xx, yy;
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int dh[3];
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int dv[3];
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dh[0] = src[0] - src[-3];
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dv[0] = src[0] - src[-src_step];
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dh[1] = src[1] - src[-2];
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dv[1] = src[1] - src[1-src_step];
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dh[2] = src[2] - src[-1];
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dv[2] = src[2] - src[2-src_step];
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m[0] = dh[0]*dh[0] + dh[1]*dh[1] + dh[2]*dh[2];
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m[2] = dh[0]*dv[0] + dh[1]*dv[1] + dh[2]*dv[2];
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m[1] = dv[0]*dv[0] + dv[1]*dv[1] + dh[2]*dh[2];
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val = (m[0] + m[2]) +
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sqrt(((double)((double)m[0] - m[2]))*(m[0] - m[2]) + (4.*m[1])*m[1]);
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/*
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xx = m[1];
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yy = v - m[0];
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v /= sqrt(xx*xx + yy*yy) + 1e-7;
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xx *= v;
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yy *= v;
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dx[x] = (short)cvRound(xx);
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dy[x] = (short)cvRound(yy);
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//dx[x] = (short)cvRound(v);
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//dx[x] = dy[x] = (short)v;
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d[0] = src[0] - src[-3];
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ad[0] = CV_IABS(d[0]);
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d[1] = src[1] - src[-2];
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ad[1] = CV_IABS(d[1]);
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d[2] = src[2] - src[-1];
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ad[2] = CV_IABS(d[2]);
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f0 = ad[1] > ad[0];
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f1 = ad[2] > ad[f0];
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val = d[tab[f0*2 + f1]];
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d[0] = src[0] - src[-src_step];
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ad[0] = CV_IABS(d[0]);
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d[1] = src[1] - src[1-src_step];
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ad[1] = CV_IABS(d[1]);
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d[2] = src[2] - src[2-src_step];
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ad[2] = CV_IABS(d[2]);
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f0 = ad[1] > ad[0];
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f1 = ad[2] > ad[f0];
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dst[x] = (uchar)(val + d[tab[f0*2 + f1]] > thresh ? 255 : 0);*/
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dst[x] = (uchar)(val > thresh);
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}
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src = src0;
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}
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}
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#endif
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static const CvPoint icvCodeDeltas[8] =
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{ CvPoint(1, 0), CvPoint(1, -1), CvPoint(0, -1), CvPoint(-1, -1), CvPoint(-1, 0), CvPoint(-1, 1), CvPoint(0, 1), CvPoint(1, 1) };
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static CvSeq*
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icvGetComponent( uchar* img, int step, CvRect rect,
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CvMemStorage* storage )
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{
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const char nbd = 4;
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int deltas[16];
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int x, y;
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CvSeq* exterior = 0;
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char* ptr;
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/* initialize local state */
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CV_INIT_3X3_DELTAS( deltas, step, 1 );
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memcpy( deltas + 8, deltas, 8 * sizeof( deltas[0] ));
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ptr = (char*)(img + step*rect.y);
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rect.width += rect.x;
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rect.height += rect.y;
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for( y = rect.y; y < rect.height; y++, ptr += step )
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{
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int prev = ptr[rect.x - 1] & -2;
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for( x = rect.x; x < rect.width; x++ )
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{
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int p = ptr[x] & -2;
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//assert( exterior || ((p | prev) & -4) == 0 );
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if( p != prev )
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{
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CvSeq *seq = 0;
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int is_hole = 0;
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CvSeqWriter writer;
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char *i0, *i1, *i3, *i4 = 0;
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int prev_s = -1, s, s_end;
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CvPoint pt(x, y);
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if( !(prev == 0 && p == 2) ) /* if not external contour */
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{
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/* check hole */
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if( p != 0 || prev < 1 )
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{
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prev = p;
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continue;
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}
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is_hole = 1;
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if( !exterior )
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{
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assert(0);
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return 0;
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}
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}
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cvStartWriteSeq( CV_SEQ_CONTOUR | (is_hole ? CV_SEQ_FLAG_HOLE : 0),
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sizeof(CvContour), sizeof(CvPoint), storage, &writer );
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s_end = s = is_hole ? 0 : 4;
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i0 = ptr + x - is_hole;
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do
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{
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s = (s - 1) & 7;
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i1 = i0 + deltas[s];
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if( (*i1 & -2) != 0 )
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break;
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}
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while( s != s_end );
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if( s == s_end ) /* single pixel domain */
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{
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*i0 = (char) (nbd | -128);
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CV_WRITE_SEQ_ELEM( pt, writer );
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}
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else
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{
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i3 = i0;
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prev_s = s ^ 4;
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/* follow border */
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for( ;; )
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{
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s_end = s;
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for( ;; )
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{
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i4 = i3 + deltas[++s];
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if( (*i4 & -2) != 0 )
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break;
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}
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s &= 7;
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/* check "right" bound */
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if( (unsigned) (s - 1) < (unsigned) s_end )
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{
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*i3 = (char) (nbd | -128);
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}
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else if( *i3 > 0 )
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{
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*i3 = nbd;
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}
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if( s != prev_s )
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{
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CV_WRITE_SEQ_ELEM( pt, writer );
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prev_s = s;
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}
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pt.x += icvCodeDeltas[s].x;
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pt.y += icvCodeDeltas[s].y;
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if( i4 == i0 && i3 == i1 )
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break;
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i3 = i4;
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s = (s + 4) & 7;
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} /* end of border following loop */
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}
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seq = cvEndWriteSeq( &writer );
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cvContourBoundingRect( seq, 1 );
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if( !is_hole )
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exterior = seq;
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else
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{
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seq->v_prev = exterior;
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seq->h_next = exterior->v_next;
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if( seq->h_next )
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seq->h_next->h_prev = seq;
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exterior->v_next = seq;
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}
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prev = ptr[x] & -2;
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}
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}
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}
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return exterior;
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}
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CV_IMPL CvSeq*
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cvSegmentImage( const CvArr* srcarr, CvArr* dstarr,
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double canny_threshold,
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double ffill_threshold,
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CvMemStorage* storage )
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{
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CvSeq* root = 0;
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CvMat* gray = 0;
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CvMat* canny = 0;
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//CvMat* temp = 0;
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void* stack = 0;
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CV_FUNCNAME( "cvSegmentImage" );
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__BEGIN__;
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CvMat srcstub, *src;
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CvMat dststub, *dst;
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CvMat* mask;
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CvSize size;
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CvPoint pt;
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int ffill_lw_up = cvRound( fabs(ffill_threshold) );
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CvSeq* prev_seq = 0;
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CV_CALL( src = cvGetMat( srcarr, &srcstub ));
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CV_CALL( dst = cvGetMat( dstarr, &dststub ));
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size = cvGetSize( src );
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CV_CALL( gray = cvCreateMat( size.height, size.width, CV_8UC1 ));
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CV_CALL( canny = cvCreateMat( size.height, size.width, CV_8UC1 ));
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//CV_CALL( temp = cvCreateMat( size.height/2, size.width/2, CV_8UC3 ));
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CV_CALL( stack = cvAlloc( size.width * size.height * sizeof(Seg)));
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cvCvtColor( src, gray, CV_BGR2GRAY );
|
|
cvCanny( gray, canny, 0/*canny_threshold*0.4*/, canny_threshold, 3 );
|
|
cvThreshold( canny, canny, 1, 1, CV_THRESH_BINARY );
|
|
//cvZero( canny );
|
|
//color_derv( src, canny, canny_threshold );
|
|
|
|
//cvPyrDown( src, temp );
|
|
//cvPyrUp( temp, dst );
|
|
|
|
//src = dst;
|
|
mask = canny; // a new name for new role
|
|
|
|
// make a non-zero border.
|
|
cvRectangle( mask, cvPoint(0,0), cvPoint(size.width-1,size.height-1), cvScalarAll(1), 1 );
|
|
|
|
for( pt.y = 0; pt.y < size.height; pt.y++ )
|
|
{
|
|
for( pt.x = 0; pt.x < size.width; pt.x++ )
|
|
{
|
|
if( mask->data.ptr[mask->step*pt.y + pt.x] == 0 )
|
|
{
|
|
CvConnectedComp region;
|
|
int avgVal[3] = { 0, 0, 0 };
|
|
|
|
icvSegmFloodFill_Stage1( src->data.ptr, src->step,
|
|
mask->data.ptr, mask->step,
|
|
size, pt, avgVal,
|
|
ffill_lw_up, ffill_lw_up,
|
|
®ion, stack );
|
|
|
|
/*avgVal[0] = (avgVal[0] + 15) & -32;
|
|
if( avgVal[0] > 255 )
|
|
avgVal[0] = 255;
|
|
avgVal[1] = (avgVal[1] + 15) & -32;
|
|
if( avgVal[1] > 255 )
|
|
avgVal[1] = 255;
|
|
avgVal[2] = (avgVal[2] + 15) & -32;
|
|
if( avgVal[2] > 255 )
|
|
avgVal[2] = 255;*/
|
|
|
|
if( storage )
|
|
{
|
|
CvSeq* tmpseq = icvGetComponent( mask->data.ptr, mask->step,
|
|
region.rect, storage );
|
|
if( tmpseq != 0 )
|
|
{
|
|
((CvContour*)tmpseq)->color = avgVal[0] + (avgVal[1] << 8) + (avgVal[2] << 16);
|
|
tmpseq->h_prev = prev_seq;
|
|
if( prev_seq )
|
|
prev_seq->h_next = tmpseq;
|
|
else
|
|
root = tmpseq;
|
|
prev_seq = tmpseq;
|
|
}
|
|
}
|
|
|
|
icvSegmFloodFill_Stage2( dst->data.ptr, dst->step,
|
|
mask->data.ptr, mask->step,
|
|
size, avgVal,
|
|
region.rect );
|
|
}
|
|
}
|
|
}
|
|
|
|
__END__;
|
|
|
|
//cvReleaseMat( &temp );
|
|
cvReleaseMat( &gray );
|
|
cvReleaseMat( &canny );
|
|
cvFree( &stack );
|
|
|
|
return root;
|
|
}
|
|
|
|
/* End of file. */
|