DGtal  0.9.3
greedyAlphaThickDecomposition.cpp
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1 
41 #include <iostream>
43 #include "ConfigExamples.h"
44 #include "DGtal/helpers/StdDefs.h"
45 #include "DGtal/base/Common.h"
46 #include "DGtal/geometry/curves/AlphaThickSegmentComputer.h"
47 #include "DGtal/io/boards/Board2D.h"
48 #include "DGtal/geometry/curves/GreedySegmentation.h"
49 #include <DGtal/io/readers/GenericReader.h>
51 
52 using namespace std;
53 using namespace DGtal;
54 
56 
57 int main()
58 {
59  trace.beginBlock ( "Example of greedy alpha thick segment decompotion" );
60 
61  typedef std::vector<Z2i::RealPoint>::const_iterator ConstIterator;
62  typedef AlphaThickSegmentComputer<Z2i::RealPoint, ConstIterator > AlphaThickSegmentComputer2D;
63 
64  Board2D aBoard;
65  std::string file = examplesPath + "samples/contourSnoisy.sdp";
66  std::vector<Z2i::RealPoint> aContour = PointListReader<Z2i::RealPoint>::getPointsFromFile (file);
67 
69 
70  // displaying contour
71  aBoard << SetMode(aContour[0].className(), "Grid");
72  std::vector<LibBoard::Point> poly;
73  for (unsigned int i = 0; i< aContour.size(); i++) poly.push_back(LibBoard::Point(aContour[i][0], aContour[i][1]));
75  aBoard.fillPolyline(poly);
76 
77  // Computing greedy Alpha Thick decomposition.
79  aBoard << SetMode("AlphaThickSegment", "BoundingBox");
81 
83  DecompositionAT theDecomposition(aContour.begin(), aContour.end(), AlphaThickSegmentComputer2D(4));
85 
87  for ( DecompositionAT::SegmentComputerIterator
88  it = theDecomposition.begin(),
89  itEnd = theDecomposition.end();
90  it != itEnd; ++it )
91  {
92  aBoard << CustomStyle( (*it).className(),
93  new CustomPenColor( Color::Blue ) );
94  aBoard<< *it;
95  }
97 
98  aBoard.saveEPS("greedyAlphaThickDecomposition.eps");
99 
100  trace.endBlock();
101  return 0;
102 }
103 // //
void beginBlock(const std::string &keyword="")
void fillPolyline(const std::vector< Point > &points, int depthValue=-1)
Definition: Board.cpp:551
MyDigitalSurface::ConstIterator ConstIterator
Trace trace
Definition: Common.h:137
STL namespace.
double endBlock()
Struct representing a 2D point.
Definition: Point.h:27
Aim: Computes the greedy segmentation of a range given by a pair of ConstIterators. The last element of a given segment is the first one one of the next segment.
static const Color Gray
Definition: Color.h:389
Aim: Implements method to read a set of points represented in each line of a file.
void saveEPS(const char *filename, PageSize size=Board::BoundingBox, double margin=10.0) const
Definition: Board.cpp:805
DGtal is the top-level namespace which contains all DGtal functions and types.
Modifier class in a Board2D stream. Useful to choose your own mode for a given class. Realizes the concept CDrawableWithBoard2D.
Definition: Board2D.h:247
Board & setPenColor(const DGtal::Color &color)
Definition: Board.cpp:298
Aim: This class is devoted to the recognition of alpha thick segments as described in ...
Custom style class redefining the pen color. You may use Board2D::Color::None for transparent color...
Definition: Board2D.h:312
Aim: This class specializes a &#39;Board&#39; class so as to display DGtal objects more naturally (with <<)...
Definition: Board2D.h:70