DGtal  0.9.4beta
images/exampleRigidtransformation2d.cpp

Example of 2D rigid transformation using forward and backward model.

See also
Geometric transformations
church_backward.jpg
Result for backward model
#include <iostream>
#include <cmath>
#include "DGtal/images/ImageSelector.h"
#include "DGtal/images/ImageContainerBySTLVector.h"
#include "DGtal/images/ConstImageAdapter.h"
#include "ConfigExamples.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/base/Common.h"
#include "DGtal/io/readers/PGMReader.h"
#include "DGtal/io/writers/GenericWriter.h"
#include "DGtal/images/RigidTransformation2D.h"
using namespace std;
using namespace DGtal;
using namespace functors;
using namespace Z2i;
int main( int , char** )
{
typedef ForwardRigidTransformation2D < Space > ForwardTrans;
typedef BackwardRigidTransformation2D < Space > BackwardTrans;
typedef DomainRigidTransformation2D < Domain, ForwardTrans > MyDomainTransformer;
typedef MyDomainTransformer::Bounds Bounds;
trace.beginBlock ( "Example rigidtransformation2d" );
ForwardTrans forwardTrans( RealPoint ( 5, 5 ), M_PI_4, RealVector( 3, -3 ) );
BackwardTrans backwardTrans( RealPoint ( 5, 5 ), M_PI_4, RealVector( 3, -3 ) );
MyDomainTransformer domainTransformer ( forwardTrans );
Identity idD;
Image image = PGMReader<Image>::importPGM ( examplesPath + "samples/church.pgm" );
Bounds bounds = domainTransformer ( image.domain() );
Domain transformedDomain ( bounds.first, bounds.second );
trace.beginBlock ( "Backward - Eulerian model" );
MyImageBackwardAdapter backwardImageAdapter ( image, transformedDomain , backwardTrans, idD );
backwardImageAdapter >> "backward_transform.pgm";
trace.beginBlock( "Forward - Lagrangian model" );
Image forwardTransformedImage ( transformedDomain );
for ( Domain::ConstIterator it = image.domain().begin(); it != image.domain().end(); ++it )
{
forwardTransformedImage.setValue ( forwardTrans ( *it ), image ( *it ) );
}
forwardTransformedImage >> "forward_transform.pgm";
return 0;
}
// //