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