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| ConvexHullFeatures Class Reference |

Compute object features related to the convex hull. More...

`#include <vigra/accumulator.hxx>`

## Classes

struct | Impl
| Result type of the covex hull feature calculation. More...

## Detailed Description

Compute object features related to the convex hull.

AccumulatorChain must be used with CoupledIterator in order to have access to pixel coordinates. The convex hull features are only available when `WITH_LEMON` is set.

Minimal example how to calculate the features:

// "labels" is the array with the region labels
MultiArrayView<2, int> labels = ...;
// Set up the accumulator chain and ignore the zero label
AccumulatorChainArray<
CoupledArrays<2, int>,
Select<LabelArg<1>, ConvexHullFeatures> > chain;
chain.ignoreLabel(0);
// Extract the features
extractFeatures(labels, chain);
// Finalize the calculation for label 1
getAccumulator<ConvexHullFeatures>(chain, 1).finalize();
// Get the features
... = getAccumulator<ConvexHullFeatures>(chain, 1).inputCenter();

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

- vigra/accumulator.hxx

vigra::acc::extractFeatures
void extractFeatures(...)

© 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