DGtal  0.9.3
extract2DImagesFrom3D.cpp
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1 
41 #include <iostream>
43 #include <sstream>
44 #include "DGtal/kernel/BasicPointFunctors.h"
45 #include "DGtal/base/Common.h"
46 #include "DGtal/helpers/StdDefs.h"
47 #include "DGtal/io/readers/VolReader.h"
48 #include "DGtal/io/writers/PGMWriter.h"
49 #include "DGtal/images/ImageSelector.h"
50 #include "DGtal/images/ConstImageAdapter.h"
51 #include "ConfigExamples.h"
53 
54 using namespace std;
55 using namespace DGtal;
56 
58 
59 const int IMAGE_PATCH_WIDTH = 70;
60 
61 int main( int /*argc*/, char** /*argv*/ )
62 {
66  Image3D::Value, DGtal::functors::Identity > ImageAdapterExtractor;
68 
70  DGtal::Z3i::Point origin(150, 150, 10);
71  DGtal::Z3i::Point ptUpper1(220, 220, 10);
72  DGtal::Z3i::Point ptUpper2(150, 150, 50);
73  DGtal::Z2i::Domain domainImage2D (DGtal::Z2i::Point(0,0),
74  DGtal::Z2i::Point(static_cast<int>((ptUpper1-origin).norm()),
75  static_cast<int>((ptUpper2-origin).norm())));
77  DGtal::Z3i::Point ptCenter(175, 175, 20);
78  DGtal::Z2i::Domain domainImage2D2 (DGtal::Z2i::Point(0,0),
80 
81 
82  // Importing a 3D image
83  std::string filename = examplesPath + "samples/lobster.vol";
84  Image3D image = VolReader<Image3D>::importVol( filename );
85  DGtal::Z3i::Domain domainImage3D = image.domain();
87 
88  trace.beginBlock ( "Example extract2DImagesFrom3D" );
89 
90  // Extracting 2D images ... and export them in the pgm format.
91  for (unsigned int i=0; i<30; i+=10){
92  std::stringstream name;
93  name << "lobsterExtracted_" << i << ".pgm";
94  std::stringstream name2;
95  name2 << "lobsterExtracted_" << i << "V2.pgm";
96 
99  ptUpper1+DGtal::Z3i::Point(i,i,0),
100  ptUpper2+DGtal::Z3i::Point(i,i,0));
101 
102  ImageAdapterExtractor extractedImage(image, domainImage2D, embedder, idV);
104 
106  DGtal::functors::Point2DEmbedderIn3D<DGtal::Z3i::Domain > embedder2(domainImage3D, ptCenter+DGtal::Z3i::Point(i,i,0),
107  DGtal::Z3i::RealPoint(1,-1,0),
109  ImageAdapterExtractor extractedImage2(image, domainImage2D2, embedder2, idV);
111 
112  PGMWriter< ImageAdapterExtractor>::exportPGM(name.str(), extractedImage);
113  PGMWriter< ImageAdapterExtractor>::exportPGM(name2.str(), extractedImage2);
114  }
115 
116  // trace.endBlock();
117  return 0;
118 }
119 // //
void beginBlock(const std::string &keyword="")
Trace trace
Definition: Common.h:137
STL namespace.
Aim: Define a simple default functor that just returns its argument.
Aim: Functor that embeds a 2D point into a 3D space from two axis vectors and an origin point given i...
Aim: implements methods to read a "Vol" file format.
Definition: VolReader.h:89
DGtal is the top-level namespace which contains all DGtal functions and types.
Aim: Export a 2D and a 3D Image using the Netpbm PGM formats (ASCII mode).
Definition: PGMWriter.h:88
int main(int, char **)
Aim: implements a const image adapter with a given domain (i.e. a subdomain) and 2 functors : g for d...
const int IMAGE_PATCH_WIDTH