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Local Minima and Maxima | ![]() |
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Functions | |
template<...> void | localMinima (SrcIterator sul, SrcIterator slr, SrcAccessor sa, DestIterator dul, DestAccessor da, DestValue marker) |
Find local minima in an image. | |
template<...> void | localMaxima (SrcIterator sul, SrcIterator slr, SrcAccessor sa, DestIterator dul, DestAccessor da, DestValue marker) |
Find local maxima in an image. | |
template<...> void | extendedLocalMinima (SrcIterator sul, SrcIterator slr, SrcAccessor sa, DestIterator dul, DestAccessor da, DestValue marker) |
Find local minimal regions in an image. | |
template<...> void | extendedLocalMaxima (SrcIterator sul, SrcIterator slr, SrcAccessor sa, DestIterator dul, DestAccessor da, DestValue marker) |
Find local maximal regions in an image. |
Detailed Description |
void extendedLocalMaxima (...) |
Find local maximal regions in an image.
This function finds regions of uniform pixel value whose neighboring regions are all have smaller values (maximal plateaus of arbitrary size). Maximal regions are marked in the destination image with the given marker value (default is 1), all other destination pixels remain unchanged. Declarations: pass arguments explicitly: namespace vigra { template <class SrcIterator, class SrcAccessor, class DestIterator, class DestAccessor, class DestValue = DestAccessor::value_type> void extendedLocalMaxima(SrcIterator sul, SrcIterator slr, SrcAccessor sa, DestIterator dul, DestAccessor da, DestValue marker = NumericTraits<DestValue>::one()) } use argument objects in conjuction with Argument Object Factories: namespace vigra { template <class SrcIterator, class SrcAccessor, class DestIterator, class DestAccessor, class DestValue = DestAccessor::value_type> void extendedLocalMaxima(triple<SrcIterator, SrcIterator, SrcAccessor> src, pair<DestIterator, DestAccessor> dest, DestValue marker = NumericTraits<DestValue>::one()) } Usage:
#include "vigra/localminmax.hxx"
vigra::BImage src(w,h), maxima(w,h); // init destiniation image maxima = 0; vigra::extendedLocalMaxima(srcImageRange(src), destImage(maxima)); Required Interface:
SrcImageIterator src_upperleft, src_lowerright; DestImageIterator dest_upperleft; SrcAccessor src_accessor; DestAccessor dest_accessor; SrcAccessor::value_type u = src_accessor(src_upperleft); u == u u < u DestValue marker; dest_accessor.set(marker, dest_upperleft); |
void extendedLocalMinima (...) |
Find local minimal regions in an image.
This function finds regions of uniform pixel value whose neighboring regions are all have larger values (minimal plateaus of arbitrary size). Minimal regions are marked in the destination image with the given marker value (default is 1), all other destination pixels remain unchanged. Declarations: pass arguments explicitly: namespace vigra { template <class SrcIterator, class SrcAccessor, class DestIterator, class DestAccessor, class DestValue = DestAccessor::value_type> void extendedLocalMinima(SrcIterator sul, SrcIterator slr, SrcAccessor sa, DestIterator dul, DestAccessor da, DestValue marker = NumericTraits<DestValue>::one()) } use argument objects in conjuction with Argument Object Factories: namespace vigra { template <class SrcIterator, class SrcAccessor, class DestIterator, class DestAccessor, class DestValue = DestAccessor::value_type> void extendedLocalMinima(triple<SrcIterator, SrcIterator, SrcAccessor> src, pair<DestIterator, DestAccessor> dest, DestValue marker = NumericTraits<DestValue>::one()) } Usage:
#include "vigra/localminmax.hxx"
vigra::BImage src(w,h), minima(w,h); // init destiniation image minima = 0; vigra::extendedLocalMinima(srcImageRange(src), destImage(minima)); Required Interface:
SrcImageIterator src_upperleft, src_lowerright; DestImageIterator dest_upperleft; SrcAccessor src_accessor; DestAccessor dest_accessor; SrcAccessor::value_type u = src_accessor(src_upperleft); u == u u < u DestValue marker; dest_accessor.set(marker, dest_upperleft); |
void localMaxima (...) |
Find local maxima in an image.
The maxima are found only when the have a size of one pixel. Use extendedLocalMaxima() to find maximal plateaus. Maxima are marked in the destination image with the given marker value (default is 1), all other destination pixels remain unchanged. Declarations: pass arguments explicitly: namespace vigra { template <class SrcIterator, class SrcAccessor, class DestIterator, class DestAccessor, class DestValue = DestAccessor::value_type> void localMaxima(SrcIterator sul, SrcIterator slr, SrcAccessor sa, DestIterator dul, DestAccessor da, DestValue marker = NumericTraits<DestValue>::one()) } use argument objects in conjuction with Argument Object Factories: namespace vigra { template <class SrcIterator, class SrcAccessor, class DestIterator, class DestAccessor, class DestValue = DestAccessor::value_type> void localMaxima(triple<SrcIterator, SrcIterator, SrcAccessor> src, pair<DestIterator, DestAccessor> dest, DestValue marker = NumericTraits<DestValue>::one()) } Usage:
#include "vigra/localminmax.hxx"
vigra::BImage src(w,h), maxima(w,h); // init destiniation image maxima = 0; vigra::localMaxima(srcImageRange(src), destImage(maxima)); Required Interface:
SrcImageIterator src_upperleft, src_lowerright; DestImageIterator dest_upperleft; SrcAccessor src_accessor; DestAccessor dest_accessor; SrcAccessor::value_type u = src_accessor(src_upperleft); u < u DestValue marker; dest_accessor.set(marker, dest_upperleft); |
void localMinima (...) |
Find local minima in an image.
The minima are found only when the have a size of one pixel. Use extendedLocalMinima() to find minimal plateaus. Minima are marked in the destination image with the given marker value (default is 1), all other destination pixels remain unchanged. Declarations: pass arguments explicitly: namespace vigra { template <class SrcIterator, class SrcAccessor, class DestIterator, class DestAccessor, class DestValue = DestAccessor::value_type> void localMinima(SrcIterator sul, SrcIterator slr, SrcAccessor sa, DestIterator dul, DestAccessor da, DestValue marker = NumericTraits<DestValue>::one()) } use argument objects in conjuction with Argument Object Factories: namespace vigra { template <class SrcIterator, class SrcAccessor, class DestIterator, class DestAccessor, class DestValue = DestAccessor::value_type> void localMinima(triple<SrcIterator, SrcIterator, SrcAccessor> src, pair<DestIterator, DestAccessor> dest, DestValue marker = NumericTraits<DestValue>::one()) } Usage:
#include "vigra/localminmax.hxx"
vigra::BImage src(w,h), minima(w,h); // init destiniation image minima = 0; vigra::localMinima(srcImageRange(src), destImage(minima)); Required Interface:
SrcImageIterator src_upperleft, src_lowerright; DestImageIterator dest_upperleft; SrcAccessor src_accessor; DestAccessor dest_accessor; SrcAccessor::value_type u = src_accessor(src_upperleft); u < u DestValue marker; dest_accessor.set(marker, dest_upperleft); |
© Ullrich Köthe (koethe@informatik.uni-hamburg.de) |
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