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GaborFilterFamily< ImageType, Alloc > Class Template Reference |  |
Family of gabor filters of different scale and direction. More...
#include <vigra/gaborfilter.hxx>
Public Member Functions | |
| int | directionCount () const |
| int | filterIndex (int direction, int scale) const |
| GaborFilterFamily (const Diff2D &size, int directionCount=stdDirectionCount, int scaleCount=stdScaleCount, double maxCenterFrequency=3.0/8.0, Alloc const &alloc=Alloc()) | |
| GaborFilterFamily (int width=stdFilterSize, int height=-1, int directionCount=stdDirectionCount, int scaleCount=stdScaleCount, double maxCenterFrequency=3.0/8.0, Alloc const &alloc=Alloc()) | |
| ImageType const & | getFilter (int direction, int scale) const |
| double | maxCenterFrequency () |
| virtual void | resizeImages (const Diff2D &newSize) |
| int | scaleCount () const |
| void | setDirectionScaleCounts (int directionCount, int scaleCount) |
| void | setMaxCenterFrequency (double maxCenterFrequency) |
 Public Member Functions inherited from ImageArray< ImageType, Alloc > | |
| reference | back () |
| const_reference | back () const |
| iterator | begin () |
| const_iterator | begin () const |
| size_type | capacity () const |
| void | clear () |
| bool | empty () |
| iterator | end () |
| const_iterator | end () const |
| iterator | erase (iterator pos) |
| iterator | erase (iterator begin, iterator end) |
| reference | front () |
| const_reference | front () const |
| ImageArray (unsigned int numImages, const Diff2D &imageSize, Alloc const &alloc=Alloc()) | |
| ImageArray (unsigned int numImages=0, Alloc const &alloc=Alloc()) | |
| ImageArray (unsigned int numImages, const ImageType &image, Alloc const &alloc=Alloc()) | |
| template<class InputIterator > | |
| ImageArray (InputIterator begin, InputIterator end, Alloc const &alloc=Alloc()) | |
| Size2D | imageSize () const |
| iterator | insert (iterator pos, const_reference image) |
| void | insert (iterator pos, size_type count, const_reference image) |
| template<class InputIterator > | |
| void | insert (iterator pos, InputIterator begin, InputIterator end) |
| size_type | max_size () const |
| bool | operator== (const ImageArray< ImageType, Alloc > &other) |
| reference | operator[] (size_type index) |
| const_reference | operator[] (size_type index) const |
| void | pop_back () |
| void | push_back (const_reference image) |
| reverse_iterator | rbegin () |
| const_reverse_iterator | rbegin () const |
| reverse_iterator | rend () |
| const_reverse_iterator | rend () const |
| void | reserve (size_type n) |
| void | resize (size_type newSize) |
| void | resize (size_type newSize, ImageType &image) |
| void | resizeImages (int width, int height) |
| size_type | size () const |
| void | swap (const_reference other) |
Additional Inherited Members | |
| Public Types inherited from ImageArray< ImageType, Alloc > | |
| typedef ImageType | value_type |
Detailed Description
template<class ImageType, class Alloc = typename ImageType::allocator_type::template rebind<ImageType>::other>
class vigra::GaborFilterFamily< ImageType, Alloc >
Family of gabor filters of different scale and direction.
A GaborFilterFamily can be used to quickly create a whole family of gabor filters in frequency space. Especially useful in conjunction with applyFourierFilterFamily, since it's derived from ImageArray.
The filter parameters are chosen to make the center frequencies decrease in octaves with increasing scale indices, and to make the half-peak-magnitude ellipses touch each other to somewhat reduce redundancy in the filter answers. This is done by using angularGaborSigma() and radialGaborSigma(), you'll find more information there.
The template parameter ImageType should be a scalar image type suitable for filling in
#include <vigra/gaborfilter.hxx>
Namespace: vigra
Constructor & Destructor Documentation
| GaborFilterFamily | ( | const Diff2D & | size, |
| int | directionCount = stdDirectionCount, |
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| int | scaleCount = stdScaleCount, |
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| double | maxCenterFrequency = 3.0/8.0, |
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| Alloc const & | alloc = Alloc() |
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| ) |
Constructs a family of gabor filters in frequency space. The filters will be calculated on construction, so it makes sense to provide good parameters right now although they can be changed later, too. If you leave them out, the defaults are a directionCount of 6, a scaleCount of 4 and a maxCenterFrequency of 3/8(=0.375).
| GaborFilterFamily | ( | int | width = stdFilterSize, |
| int | height = -1, |
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| int | directionCount = stdDirectionCount, |
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| int | scaleCount = stdScaleCount, |
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| double | maxCenterFrequency = 3.0/8.0, |
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| Alloc const & | alloc = Alloc() |
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| ) |
Convenience variant of the above constructor taking width and height separately. Also, this one serves as default constructor constructing 128x128 pixel filters.
Member Function Documentation
| int filterIndex | ( | int | direction, |
| int | scale | ||
| ) | const |
Return the index of the filter with the given direction and scale in this ImageArray. direction must in the range 0..directionCount()-1 and scale in the range 0..rangeCount()-1. This is useful for example if you used applyFourierFilterFamily() and got a resulting ImageArray which still has the same order of images, but no getFilter() method anymore.
| ImageType const& getFilter | ( | int | direction, |
| int | scale | ||
| ) | const |
Return the filter with the given direction and scale. direction must in the range 0..directionCount()-1 and scale in the range 0..rangeCount()-1. filters.getFilter(direction, scale) is the same as filters[filterIndex(direction, scale)].
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virtual |
Resize all filters (causing their recalculation).
Reimplemented from ImageArray< ImageType, Alloc >.
| int scaleCount | ( | ) | const |
Query the number of filter scales available.
| int directionCount | ( | ) | const |
Query the number of filter directions available.
| void setDirectionScaleCounts | ( | int | directionCount, |
| int | scaleCount | ||
| ) |
Change the number of directions / scales. This causes the recalculation of all filters.
| double maxCenterFrequency | ( | ) |
Return the center frequency of the filter(s) with scale==0. Filters with scale>0 will have a center frequency reduced in octaves: centerFrequency= maxCenterFrequency / 2.0^scale
| void setMaxCenterFrequency | ( | double | maxCenterFrequency | ) |
Change the center frequency of the filter(s) with scale==0. See maxCenterFrequency().
The documentation for this class was generated from the following file:
- vigra/gaborfilter.hxx