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StridedImageIterator< PIXELTYPE > Class Template Reference |
Iterator to be used when pixels are to be skipped. More...
#include <vigra/imageiterator.hxx>
Public Member Functions | |
StridedImageIterator (pointer base, std::ptrdiff_t ystride, std::ptrdiff_t xskip, std::ptrdiff_t yskip) | |
StridedImageIterator () | |
Public Member Functions inherited from ImageIteratorBase< StridedImageIterator< PIXELTYPE >, PIXELTYPE, PIXELTYPE &, PIXELTYPE *, StridedArrayTag > | |
bool | operator== (ImageIteratorBase const &rhs) const |
bool | operator!= (ImageIteratorBase const &rhs) const |
difference_type | operator- (ImageIteratorBase const &rhs) const |
StridedImageIterator< PIXELTYPE > | operator- (difference_type const &s) const |
StridedImageIterator< PIXELTYPE > & | operator+= (difference_type const &s) |
StridedImageIterator< PIXELTYPE > & | operator-= (difference_type const &s) |
StridedImageIterator< PIXELTYPE > | operator+ (difference_type const &s) const |
reference | operator* () const |
pointer | operator-> () const |
index_reference | operator[] (Diff2D const &d) const |
pointer | operator[] (std::ptrdiff_t dy) const |
index_reference | operator() (std::ptrdiff_t dx, std::ptrdiff_t dy) const |
Iterator to be used when pixels are to be skipped.
This iterator can be used when some pixels shall be automatically skipped, for example if an image is to be sub-sampled: instead of advancing to the next pixel, ++iterator.x
jumps to the pixel at a horizontal offset of xskip
. Likewise with yskip
in vertical direction. Most functions and local types are inherited from ImageIteratorBase.
Usage:
#include <vigra/imageiterator.hxx>
Namespace: vigra
StridedImageIterator | ( | pointer | base, |
std::ptrdiff_t | ystride, | ||
std::ptrdiff_t | xskip, | ||
std::ptrdiff_t | yskip | ||
) |
Construct from raw memory with a vertical stride of ystride
, jumping by xskip
horizontally and yskip
vertically. ystride
must be the physical width (row length) of the image.
Default constructor
© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) |
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