[ VIGRA Homepage | Function Index | Class Index | Namespaces | File List | Main Page ]
|
VectorComponentValueAccessor< VECTORTYPE > Class Template Reference | ![]() |
Accessor for one component of a vector. More...
#include <vigra/accessor.hxx>
Public Types | |
| typedef VECTORTYPE::value_type | value_type |
Public Member Functions | |
| template<class ITERATOR > | |
| value_type | operator() (ITERATOR const &i) const |
| template<class ITERATOR , class OFFSET > | |
| value_type | operator() (ITERATOR const &i, OFFSET const &diff) const |
| template<class V , class ITERATOR > | |
| void | set (V value, ITERATOR const &i) const |
| template<class V , class ITERATOR , class OFFSET > | |
| void | set (V value, ITERATOR const &i, OFFSET const &diff) const |
| void | setIndex (int i) |
| VectorComponentValueAccessor (int index) | |
Accessor for one component of a vector.
This accessor allows to select a single component (a single 'band') of a vector valued pixel type. The pixel type must support operator[]. The index of the component to be selected is passed in the constructor. The accessor returns its items by value. If you want to pass/return items by reference, use VectorComponentAccessor. If a floating point number is assigned by means of an accessor with integral value_type, the value is rounded and clipped as appropriate.
Usage:
#include <vigra/accessor.hxx>
Namespace: vigra
| typedef VECTORTYPE::value_type value_type |
the value_type
| VectorComponentValueAccessor | ( | int | index | ) |
determine the component to be accessed
| value_type operator() | ( | ITERATOR const & | i | ) | const |
Read the current data item. The type ITERATOR::index_reference::value_type is automatically converted to value_type. In case of a conversion floating point -> integral this includes rounding and clipping.
| value_type operator() | ( | ITERATOR const & | i, |
| OFFSET const & | diff | ||
| ) | const |
Read the data item at an offset (can be 1D or 2D or higher order difference). The type ITERATOR::index_reference::value_type is automatically converted to value_type. In case of a conversion floating point -> integral this includes rounding and clipping.
| void set | ( | V | value, |
| ITERATOR const & | i | ||
| ) | const |
Write the current data item. The type V of the passed in value is automatically converted to value_type. In case of a conversion floating point -> integral this includes rounding and clipping.
| void set | ( | V | value, |
| ITERATOR const & | i, | ||
| OFFSET const & | diff | ||
| ) | const |
Write the data item at an offset (can be 1D or 2D or higher order difference).. The type V of the passed in value is automatically converted to value_type. In case of a conversion floating point -> integral this includes rounding and clipping.
| void setIndex | ( | int | i | ) |
Reset the index to the given number.
|
© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) |
html generated using doxygen and Python
|