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ht_lines.h
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/***************************************************************************
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* ht_lines.h - Header of lines shape model
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* using Hough Transform
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*
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* Created: Fri Jan 13 12:40:57 2006
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* Copyright 2005-2006 Tim Niemueller [www.niemueller.de]
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*
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****************************************************************************/
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/* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. A runtime exception applies to
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* this software (see LICENSE.GPL_WRE file mentioned below for details).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* Read the full text in the LICENSE.GPL_WRE file in the doc directory.
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*/
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#ifndef __FIREVISION_MODELS_SHAPE_HT_LINE_H_
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#define __FIREVISION_MODELS_SHAPE_HT_LINE_H_
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#include <vector>
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#include <iostream>
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#include <cmath>
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#include <fvutils/base/types.h>
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#include <fvmodels/shape/line.h>
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#include <fvmodels/shape/accumulators/ht_accum.h>
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namespace
firevision {
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#if 0
/* just to make Emacs auto-indent happy */
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}
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#endif
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class
ROI;
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class
HtLinesModel
:
public
ShapeModel
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{
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private
:
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std::vector<LineShape> m_Lines;
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RhtAccumulator
accumulator;
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public
:
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/** Creates a new HtLinesModel instance
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* @param nr_candidates the nr of candidates that is considered per pixel (the hole angle
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* range is devided in this many parts/lines
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* @param angle_from The angle to start the candidates from, given in rad, 0 is straight up
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* @param angle_range the angle range the candidates are taken from starting at angle_from,
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* given in rad, can be used for example to only search for horizontal lines
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* @param r_scale This can be done to reduce the size of the hough space and to map more lines
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* to one line
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* @param min_votes_ratio The minimum ratio num_votes_per_line/total_num_votes that we have to
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* have before a point in the hough space is considered to be a line,
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* this may actually be higher if you use min_votes and set it to a higher
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* number (set min_votes to 0 to only use min_votes_ration)
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* @param min_votes the minimum number of votes a point in the hough space has to have before it
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* is considered to be a line. The number may actually be higher if min_votes_ratio
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* is set too high (set min_votes_ration to 0 to use only min_votes)
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*/
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HtLinesModel
(
unsigned
int
nr_candidates = 40,
float
angle_from = 0,
float
angle_range= 2 * M_PI,
int
r_scale = 1,
float
min_votes_ratio = 0.2f,
int
min_votes = -1);
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virtual
~
HtLinesModel
(
void
);
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std::string
getName
(
void
)
const
{
return
std::string(
"RhtLinesModel"
);}
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int
parseImage(
unsigned
char
* buffer,
ROI
*roi);
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int
getShapeCount(
void
)
const
;
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LineShape
* getShape(
int
id
)
const
;
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LineShape
* getMostLikelyShape(
void
)
const
;
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std::vector< LineShape > * getShapes();
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private
:
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unsigned
int
RHT_NR_CANDIDATES;
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float
RHT_ANGLE_INCREMENT;
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float
RHT_ANGLE_FROM;
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float
RHT_ANGLE_RANGE;
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// The following constants are used for RHT accumulator precision
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int
RHT_R_SCALE;
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//const int RHT_PHI_SCALE = 8;
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int
RHT_MIN_VOTES;
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float
RHT_MIN_VOTES_RATIO;
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unsigned
int
roi_width;
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unsigned
int
roi_height;
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};
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}
// end namespace firevision
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#endif // __FIREVISION_MODELS_SHAPE_HT_LINES_H_
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src
libs
fvmodels
shape
ht_lines.h
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