DGtal  1.0.0
exampleArrayImageAdapter.cpp
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1 
30 #include <iostream>
32 
33 #include <DGtal/base/Common.h>
34 #include <DGtal/helpers/StdDefs.h>
35 
36 #include <DGtal/io/boards/Board2D.h>
37 
39 #include <new>
40 #include <cmath>
41 #include <algorithm>
42 #include <DGtal/io/colormaps/HueShadeColorMap.h>
43 #include <DGtal/images/ImageContainerBySTLVector.h>
44 #include <DGtal/images/ArrayImageAdapter.h>
46 
48 
49 using namespace std;
50 using namespace DGtal;
52 
54 {
56  using Space = SpaceND<2>;
58  using Point = Domain::Point;
59  using Value = double;
60 
61  const Domain domain( Point(0, 1), Point(4, 3) );
62 
63  Value* data = new Value[ domain.size() ];
64 
65  // Convert this allocated memory to a CImage model.
66  ArrayImageAdapter< Value*, Domain > image( data, domain );
67  // Alternative syntax using the helpers:
68  // auto image = makeArrayImageAdapterFromIterator( data, domain );
69 
70  // Fill the image with first coordinate of the point
71  for ( auto it = image.begin(); it != image.end(); ++it )
72  {
73  *it = it.getPoint()[0];
74  }
75 
76  // Get a constant view on a sub-domain.
77  const Domain sub_domain( Point(1, 1), Point(3, 2) );
78  ArrayImageAdapter< Value const*, Domain > cst_image( data, domain, sub_domain );
79  // Alternative syntax using the helpers:
80  // auto const cst_image = makeArrayImageAdapterFromImage( image, sub_domain );
81 
82  // Display it.
83  for ( auto value : cst_image )
84  {
85  std::cout << value << " ";
86  }
87  std::cout << std::endl;
89 }
90 
92 {
93  using namespace Z2i;
94 
95  Board2D aBoard;
96 
98  using Value = double; // value type of the image
99  using HueShadeDouble = HueShadeColorMap<Value>; // a simple HueShadeColorMap varying on 'double' values
101 
102  trace.beginBlock("image");
103 
105  const Domain domain(Point(1,1), Point(16,16));
106  Value* data = new Value[ domain.size() ];
107  ArrayImageAdapter< Value*, Domain > image( data, domain );
109 
111  Value i = 0;
112  for ( auto & value : image )
113  value = i++;
115 
116  aBoard.clear();
117  Display2DFactory::drawImage<HueShadeDouble>(aBoard, image, 0, domain.size()-1);
118  aBoard.saveSVG("ArrayImageAdapter_image.svg");
119 
120  trace.endBlock();
121 
122  trace.beginBlock("subImage");
123 
125  Domain subDomain(Point(1,1), Point(8,8));
126  ArrayImageAdapter< Value const*, Domain > constSubImage( data, domain, subDomain );
128 
129  aBoard.clear();
130  Display2DFactory::drawImage<HueShadeDouble>(aBoard, constSubImage, 0, domain.size()-1);
131  aBoard.saveSVG("ArrayImageAdapter_subImage.svg");
132 
133  trace.endBlock();
134 
135  trace.beginBlock("modifying subImage through domain iterator");
136  {
138  ArrayImageAdapter< Value*, Domain > subImage( data, domain, subDomain );
140  }
141 
143  auto subImage = makeArrayImageAdapterFromIterator( data, domain, subDomain );
145 
146 
148  for ( auto point : subImage.domain() )
149  {
150  Value coord = (point - Point(4,4)).norm();
151  subImage.setValue( point, 25*(cos(coord)+1) );
152  }
154 
155  aBoard.clear();
156  Display2DFactory::drawImage<HueShadeDouble>(aBoard, image, 0, domain.size()-1);
157  aBoard.saveSVG("ArrayImageAdapter_subImage_modifByDomain.svg");
158 
159  trace.endBlock();
160 
161  trace.beginBlock("modifying subImage through image iterator");
163  for ( auto it = subImage.begin(), it_end = subImage.end(); it != it_end; ++it )
164  {
165  Value coord = (it.getPoint() - Point(4,4)).norm();
166  *it = 25*(sin(coord)+1);
167  }
169 
170  aBoard.clear();
171  Display2DFactory::drawImage<HueShadeDouble>(aBoard, image, 0, domain.size()-1);
172  aBoard.saveSVG("ArrayImageAdapter_subImage_modifByImage.svg");
173 
174  trace.endBlock();
175 
176  trace.beginBlock("subImage from an ImageContainerBySTLVector");
179  for (auto& value : anIterableImage)
180  value = 0;
182 
184  {
185  ArrayImageAdapter< ImageContainerBySTLVector<Domain,Value>::Iterator, Domain > subImageSTL( anIterableImage.begin(), domain, subDomain );
186  }
188 
190  auto subImageSTL = makeArrayImageAdapterFromImage( anIterableImage, subDomain );
192 
193  trace.endBlock();
194 
195  trace.beginBlock("using std::copy on ArrayImageAdapter");
197  std::copy( subImage.cbegin(), subImage.cend(), subImageSTL.begin() );
199 
200  aBoard.clear();
201  Display2DFactory::drawImage<HueShadeDouble>(aBoard, anIterableImage, 0, domain.size()-1);
202  aBoard.saveSVG("ArrayImageAdapter_subImage_copyToImageSTL.svg");
203 
204  trace.endBlock();
205 
206  delete[] data;
207 }
208 
209 int main()
210 {
213  return 0;
214 }
215 
216 // //
void beginBlock(const std::string &keyword="")
void ArrayImageAdapter_example()
Trace trace
Definition: Common.h:144
double endBlock()
Aim: This class template may be used to (linearly) convert scalar values in a given range into a colo...
Domain domain
ArrayImageAdapter< TArrayIterator, TDomain > makeArrayImageAdapterFromIterator(TArrayIterator anArrayIterator, TDomain const &aFullDomain, TDomain const &aViewDomain)
void saveSVG(const char *filename, PageSize size=Board::BoundingBox, double margin=10.0) const
Definition: Board.cpp:1012
ArrayImageAdapter< decltype(((TImage *) nullptr) ->begin()), TDomain > makeArrayImageAdapterFromImage(TImage &anImage, TDomain const &aViewDomain)
void clear(const DGtal::Color &color=DGtal::Color::None)
Definition: Board.cpp:152
DGtal is the top-level namespace which contains all DGtal functions and types.
MyPointD Point
Definition: testClone2.cpp:383
void moduleImages_example()
Image image(domain)
Aim: This class specializes a 'Board' class so as to display DGtal objects more naturally (with <<)....
Definition: Board2D.h:70