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lens_calibrate/find_N8_lines.h

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00001 /* find_N8_lines.h
00002 
00003   find straightish non-crossing lines in an edge map,
00004   using 8-neighborhood operations. (Points on the edges 
00005   of the image cannot be line points).
00006 
00007   edgeMap2linePts() marks line point in an otherwise zero 
00008   BImage; end points = 1, interior points = 2.  A threshold 
00009   on the edge map defines valid candidates.  Returns the 
00010   number of segments, 0 if edge and line image sizes differ.
00011 
00012   linePts2lineList() converts a linePts image to a list of 
00013   all lines that meet some selection criteria. The line list
00014   is a vector of pointers to N8_line objects created here;
00015   the vector itself is passed in by caller.  
00016   Returns the number of lines added
00017 */
00018 
00019 /***************************************************************************
00020  *   Copyright (C) 2009 Thomas K Sharpless                                 *
00021  *   tksharpless@gmail.com                                                 *
00022  *                                                                         *
00023  *   This program is free software; you can redistribute it and/or modify  *
00024  *   it under the terms of the GNU General Public License as published by  *
00025  *   the Free Software Foundation; either version 2 of the License, or     *
00026  *   (at your option) any later version.                                   *
00027  *                                                                         *
00028  *   This program is distributed in the hope that it will be useful,       *
00029  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00030  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
00031  *   GNU General Public License for more details.                          *
00032  *                                                                         *
00033  *   You should have received a copy of the GNU General Public License     *
00034  *   along with this program; if not, write to the                         *
00035  *   Free Software Foundation, Inc.,                                       *
00036  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
00037  ***************************************************************************/
00038 
00039 #include <vector>
00040 #include <vigra/stdimage.hxx>
00041 #include <vigra/basicimage.hxx>
00042 #include <vigra/pixelneighborhood.hxx>
00043 
00044 // colors used in lines image
00045 #define N8_bg  255
00046 #define N8_end 1
00047 #define N8_mid 96
00048 
00049 int 
00050 edgeMap2linePts( vigra::BImage & edge, bool save_images );
00051 
00052 int 
00053 linePts2lineList( vigra::BImage & img, 
00054                                   int minsize, 
00055                                   double minCtoA,  // chord/arc threshold
00056                                   std::vector<std::vector<vigra::Point2D> > & lines
00057                              );
00058 
00059