DGtal  0.9.4beta
images/exampleConstImageAdapter.cpp

Example of ConstImageAdapter.

See also
ConstImageAdapter
logImage.png
16x16 image: (1,1) to (16,16) adapted from with a log scale functor.
#include <iostream>
#include "DGtal/base/Common.h"
#include "DGtal/helpers/StdDefs.h"
#include "ConfigExamples.h"
#include "DGtal/io/boards/Board2D.h"
#include "DGtal/io/colormaps/HueShadeColorMap.h"
#include "DGtal/io/colormaps/GrayscaleColorMap.h"
#include "DGtal/images/ImageContainerBySTLVector.h"
#include "DGtal/images/ConstImageAdapter.h"
using namespace std;
using namespace DGtal;
template <typename Scalar>
struct LogScaleFunctor {
LogScaleFunctor() {};
double operator()(const Scalar &a) const
{
return std::log( 1 + NumberTraits<Scalar>::castToDouble(a) );
}
};
int main( /*int argc, char** argv*/ )
{
using namespace Z2i;
Board2D aBoard;
typedef HueShadeColorMap<unsigned char> HueShade; // a simple HueShadeColorMap varying on 'unsigned char' values
typedef HueShadeColorMap<double> HueShadeDouble; // a simple HueShadeColorMap varying on 'double' values
typedef GrayscaleColorMap<unsigned char> Gray; // a simple GrayscaleColorMap varying on 'unsigned char' values
functors::Identity df; // a simple functor that just returns its argument
trace.beginBlock("image");
Domain domain(Point(1,1), Point(16,16));
Image image(domain);
unsigned char i = 0;
for (Image::Iterator it = image.begin(); it != image.end(); ++it)
*it = i++;
aBoard.clear();
Display2DFactory::drawImage<HueShade>(aBoard, image, (unsigned char)0, (unsigned char)255);
aBoard.saveSVG("image.svg");
trace.beginBlock("subImage");
Domain subDomain(Point(1,1), Point(8,8));
ConstImageAdapterForSubImage subImage(image, subDomain, df, df);
aBoard.clear();
Display2DFactory::drawImage<HueShade>(aBoard, subImage, (unsigned char)0, (unsigned char)255);
aBoard.saveSVG("subImage.svg");
trace.beginBlock("specificImage");
DigitalSet set(domain);
for( unsigned int y=0; y < 17; y++)
for( unsigned int x=0; x < 17; x++)
if ((x%2) && (y%2))
set.insertNew(Point(x,y));
DigitalSetDomain<DigitalSet> specificDomain(set);
typedef ConstImageAdapter<Image, DigitalSetDomain<DigitalSet>, functors::Identity, Image::Value, functors::Identity > ConstImageAdapterForSpecificImage;
ConstImageAdapterForSpecificImage specificImage(image, specificDomain, df, df);
aBoard.clear();
Display2DFactory::drawImage<HueShade>(aBoard, specificImage, (unsigned char)0, (unsigned char)255);
aBoard.saveSVG("specificImage.svg");
trace.beginBlock("thresholderImage");
ConstImageAdapterForThresholderImage thresholderImage(image, domain, df, t);
aBoard.clear();
Display2DFactory::drawImage<Gray>(aBoard, thresholderImage, (unsigned char)0, (unsigned char)1);
aBoard.saveSVG("thresholderImage.svg");
trace.beginBlock("logImage");
LogScaleFunctor<Image::Value> logScale;
ConstImageAdapterForLogScale logImage(image, domain, df, logScale);
aBoard.clear();
Display2DFactory::drawImage<HueShadeDouble>(aBoard, logImage, 0.0, logScale(255));
aBoard.saveSVG("logImage.svg");
return 0;
}
// //