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vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 > Class Template Reference

define a write only accessor for a virtual Image<TinyVector<Acc1::value_type>, 2> image, which actually consists of two Images. More...

#include <FunctorAccessor.h>

List of all members.

Public Types
typedef vigra::TinyVector< typename Acc1::value_type, 2 >	value_type
	the vector's value_type
typedef value_type::value_type	component_type
Public Member Functions
	SplitVector2Accessor (Iter1 i1, Acc1 a1, Iter2 i2, Acc2 a2)
	Construct from two image iterators and associated accessors.
template<class V, class ITERATOR>
void	setComponent (V const &value, ITERATOR const &i, int idx) const
	scalar & scalar image
template<class ITERATOR>
unsigned int	size (ITERATOR const &i) const
	return the size (Number of Bands)
Public Attributes
Iter1	i1_
Acc1	a1_
Iter2	i2_
Acc2	a2_

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Detailed Description

template<class Iter1, class Acc1, class Iter2, class Acc2>
class vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >

define a write only accessor for a virtual Image<TinyVector<Acc1::value_type>, 2> image, which actually consists of two Images.

Useful to split an image into gray and alpha images while loading, like it is shown in the following example:

        vigra::ImageImportInfo info(argv[1]);

        if(info.numBands() == 2 && info.numExtraBands() == 1)
        {
            vigra::BImage image;
            vigra::BImage mask;
            image.resize(info.width(), info.height());
            mask.resize(info.width(), info.height());

            // construct special reading accessor, to split
            // the image into two images while reading
            vigra_ext::SplitVector2Accessor<BImage::Iterator,
                                            BImage::Accessor,
                                            BImage::Iterator,
                                            BImage::Accessor>
                splitA(image.upperLeft(), image.accessor(),
                       mask.upperLeft(), mask.accessor());

            importImage(info, Diff2D(), splitA );

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Member Typedef Documentation

template<class Iter1, class Acc1, class Iter2, class Acc2> typedef value_type::value_type vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >::component_type

template<class Iter1, class Acc1, class Iter2, class Acc2> typedef vigra::TinyVector<typename Acc1::value_type, 2> vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >::value_type

the vector's value_type

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Constructor & Destructor Documentation

template<class Iter1, class Acc1, class Iter2, class Acc2> vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >::SplitVector2Accessor (  Iter1  i1, Acc1  a1, Iter2  i2, Acc2  a2 )  [inline]

Construct from two image iterators and associated accessors.

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Member Function Documentation

template<class Iter1, class Acc1, class Iter2, class Acc2> template<class V, class ITERATOR> void vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >::setComponent (  V const &  value, ITERATOR const &  i, int  idx )  const [inline]

scalar & scalar image

template<class Iter1, class Acc1, class Iter2, class Acc2> template<class ITERATOR> unsigned int vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >::size (  ITERATOR const &  i  )  const [inline]

return the size (Number of Bands)

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Member Data Documentation

template<class Iter1, class Acc1, class Iter2, class Acc2> Acc1 vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >::a1_

template<class Iter1, class Acc1, class Iter2, class Acc2> Acc2 vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >::a2_

template<class Iter1, class Acc1, class Iter2, class Acc2> Iter1 vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >::i1_

template<class Iter1, class Acc1, class Iter2, class Acc2> Iter2 vigra_ext::SplitVector2Accessor< Iter1, Acc1, Iter2, Acc2 >::i2_

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The documentation for this class was generated from the following file:

• hugin_base/vigra_ext/FunctorAccessor.h

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