This example shows the tangential cover of an noisy contour from the alpha-thick segment primitive with alpha = 4.
#include <iostream>
#include "ConfigExamples.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/base/Common.h"
#include "DGtal/geometry/curves/AlphaThickSegmentComputer.h"
#include "DGtal/geometry/curves/SaturatedSegmentation.h"
#include "DGtal/base/Circulator.h"
#include "DGtal/geometry/curves/SegmentComputerUtils.h"
#include "DGtal/io/boards/Board2D.h"
{
trace.
beginBlock (
"Example of AlphaThickSegment tangential cover obtained from SaturatedSegmentation" );
typedef std::vector<Z2i::RealPoint>::const_iterator RAConstIterator;
std::string file = examplesPath + "samples/contourSnoisy.sdp";
aBoard <<
SetMode(aContour[0].className(),
"Grid");
aBoard2 <<
SetMode(aContour[0].className(),
"Grid");
std::vector<LibBoard::Point> poly;
for (
unsigned int i = 0; i< aContour.size(); i++) poly.push_back(
LibBoard::Point(aContour[i][0], aContour[i][1]));
AlphaThickSegmentComputer2D computer(4, functions::Hull2D::EuclideanThickness);
AlphaSegmentation segmentator(circulator, circulator, computer);
AlphaSegmentation::SegmentComputerIterator i = segmentator.begin();
AlphaSegmentation::SegmentComputerIterator end = segmentator.end();
for ( ; i != end; ++i) {
AlphaThickSegmentComputer2D current(*i);
aBoard <<
SetMode(current.className(),
"BoundingBox");
aBoard << current;
}
aBoard.
saveEPS(
"exampleAlphaThickSegmentTgtCover.eps");
trace.
beginBlock (
"Example of AlphaThickSegment tangential cover obtained for a single point" );
unsigned int index = 80;
firstMaximalSegment(computer, circulator+index, circulator, circulator);
AlphaThickSegmentComputer2D first (computer);
lastMaximalSegment(computer, circulator+index, circulator, circulator);
AlphaThickSegmentComputer2D last (computer);
aBoard2.
fillCircle((*(circulator+index))[0], (*(circulator+index))[1], 1.0);
while(first.end() != last.end()){
aBoard2 <<
SetMode(first.className(),
"BoundingBox");
aBoard2 << first;
nextMaximalSegment(first, circulator);
}
aBoard2 << last;
stringstream name;
name << "exampleAlphaThickSegmentTgtCoverPoint" << index<< ".eps";
aBoard2.
saveEPS(name.str().c_str());
return 0;
}
Aim: This class is devoted to the recognition of alpha thick segments as described in ....
Aim: This class specializes a 'Board' class so as to display DGtal objects more naturally (with <<)....
Aim: Provides an adapter for classical iterators that can iterate through the underlying data structu...
Structure representing an RGB triple with alpha component.
Aim: Computes the saturated segmentation, that is the whole set of maximal segments within a range gi...
void beginBlock(const std::string &keyword="")
Board & setPenColor(const DGtal::Color &color)
void fillCircle(double x, double y, double radius, int depthValue=-1)
void fillPolyline(const std::vector< Point > &points, int depthValue=-1)
void saveEPS(const char *filename, PageSize size=Board::BoundingBox, double margin=10.0) const
DGtal is the top-level namespace which contains all DGtal functions and types.
Aim: Implements method to read a set of points represented in each line of a file.
Modifier class in a Board2D stream. Useful to choose your own mode for a given class....
Struct representing a 2D point.