vigra - AccumulatorChainArray< T, Selected, dynamic > Class Template Reference

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| AccumulatorChainArray< T, Selected, dynamic > Class Template Referenceabstract |

Create an array of accumulator chains containing the selected per-region and global statistics and their dependencies. More...

`#include <vigra/accumulator.hxx>`

## Public Member Functions
MultiArrayIndex | ignoredLabel () const
void | ignoreLabel (MultiArrayIndex l)
MultiArrayIndex | maxRegionLabel () const
void | merge (unsigned i, unsigned j)
void | merge (AccumulatorChainArray const &o)
template<class ArrayLike >
void | merge (AccumulatorChainArray const &o, ArrayLike const &labelMapping)
void | operator+= (AccumulatorChainArray const &o)
void | operator+= (AccumulatorChainImpl const &o)
unsigned int | regionCount () const
template<class SHAPE >
void | setCoordinateOffset (MultiArrayIndex k, SHAPE const &offset)
template<class SHAPE >
void | setCoordinateOffset (SHAPE const &offset) void reset(unsigned int reset_to_pass=0)
void | setHistogramOptions (HistogramOptions const &options)
void | setHistogramOptions (HistogramOptions const &regionoptions, HistogramOptions const &globaloptions)
void | setMaxRegionLabel (unsigned label)
void | updatePassN (T const &t, unsigned int N)
void | updatePassN (T const &t, double weight, unsigned int N)

## Static Public Member Functions
static ArrayVector < std::string > const & | tagNames ()

## Detailed Description

### template<class T, class Selected, bool dynamic = false>
class vigra::acc::AccumulatorChainArray< T, Selected, dynamic >

Create an array of accumulator chains containing the selected per-region and global statistics and their dependencies.

AccumulatorChainArray is used to compute per-region statistics (as well as global statistics). The statistics are selected at compile-time. An array of accumulator chains (one per region) for region statistics is created and one accumulator chain for global statistics. The region labels always start at 0. Use the Global modifier to compute global statistics (by default per-region statistics are computed).

The template parameters are as follows:

- T: The input type, type of CoupledHandle (for access to coordinates, labels and weights)
- Selected: statistics to be computed and index specifier for the CoupledHandle, wrapped with Select

Usage:

const int dim = 3; //dimension of MultiArray
typedef double DataType;
typedef double WeightType;
typedef unsigned int LabelType;
typedef vigra::CoupledIteratorType<dim, DataType, WeightType, LabelType>::HandleType Handle;
AccumulatorChainArray<Handle, Select<DataArg<1>, WeightArg<2>, LabelArg<3>, Mean, Variance, ...> > a;

See Feature Accumulators for more information and examples of use.

## Member Function Documentation

void ignoreLabel | ( | MultiArrayIndex | l | ) |

Statistics will not be computed for label l. Note that only one label can be ignored.

MultiArrayIndex ignoredLabel | ( |  | ) | const

Ask for a label to be ignored. Default: -1 (meaning that no label is ignored).

void setMaxRegionLabel | ( | unsigned | label | ) |

Set the maximum region label (e.g. for merging two accumulator chains).

MultiArrayIndex maxRegionLabel | ( |  | ) | const

Maximum region label. (equal to regionCount() - 1)

unsigned int regionCount | ( |  | ) | const

Number of Regions. (equal to maxRegionLabel() + 1)

void operator+= | ( | AccumulatorChainArray< T, Selected, dynamic > const & | o | ) |

Equivalent to `merge(o)`.

void merge | ( | unsigned | i,
|  | unsigned | j
| ) |  |

Merge region i with region j.

void merge | ( | AccumulatorChainArray< T, Selected, dynamic > const & | o | ) |

Merge with accumulator chain o. maxRegionLabel() of the two accumulators must be equal.

void merge | ( | AccumulatorChainArray< T, Selected, dynamic > const & | o,
|  | ArrayLike const & | labelMapping
| ) |  |

Merge with accumulator chain o using a mapping between labels of the two accumulators. Label l of accumulator chain o is mapped to labelMapping[l]. Hence, all elements of labelMapping must be <= maxRegionLabel() and size of labelMapping must match o.regionCount().

static ArrayVector<std::string> const& tagNames | ( |  | ) |
| static

Return names of all tags in the accumulator chain (selected statistics and their dependencies).

void setCoordinateOffset | ( | MultiArrayIndex | k,
|  | SHAPE const & | offset
| ) |  |

Set an offset for `Coord<...>` statistics for region k.

If the offset is non-zero, coordinate statistics such as `RegionCenter` are computed in the global coordinate system defined by the offset. Without an offset, these statistics are computed in the local coordinate system of the current region of interest.

void setHistogramOptions | ( | HistogramOptions const & | options | ) |

Set options for all histograms in the accumulator chain. See histogram accumulators for possible options. The function is ignored if there is no histogram in the accumulator chain.

void setHistogramOptions | ( | HistogramOptions const & | regionoptions,
|  | HistogramOptions const & | globaloptions
| ) |  |

Set regional and global options for all histograms in the accumulator chain.

void setCoordinateOffset | ( | SHAPE const & | offset | ) |
| pure virtual

Set an offset for `Coord<...>` statistics.

If the offset is non-zero, coordinate statistics such as `RegionCenter` are computed in the global coordinate system defined by the offset. Without an offset, these statistics are computed in the local coordinate system of the current region of interest. vigra::acc::AccumulatorChain::reset() Reset current_pass_ of the accumulator chain to 'reset_to_pass'.

void operator+= | ( | AccumulatorChainImpl const & | o | ) |

Equivalent to merge(o) .

void updatePassN | ( | T const & | t,
|  | unsigned int | N
| ) |  |

Upate all accumulators in the accumulator chain that work in pass N with data t. Requirement: 0 < N < 6 and N >= current_pass_ . If N < current_pass_ call reset first.

void updatePassN | ( | T const & | t,
|  | double | weight,
|  | unsigned int | N
| ) |  |

Upate all accumulators in the accumulator chain that work in pass N with data t and weight. Requirement: 0 < N < 6 and N >= current_pass_ . If N < current_pass_ call reset first.

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

- vigra/accumulator.hxx

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany | html generated using doxygen and Python vigra 1.11.1 (Fri May 19 2017)