boofcv.alg.transform.pyramid

Class NoCacheScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

java.lang.Object

boofcv.alg.transform.pyramid.NoCacheScaleSpace<I,D>

All Implemented Interfaces:

GaussianScaleSpace<I,D>

public class NoCacheScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>
extends Object
implements GaussianScaleSpace<I,D>

Implementation of GaussianScaleSpace that focuses on one scale space at a time. When the scale space is changed the scaled image is recomputed and previously computed derivatives are marked as stale. Then the derivatives are recomputed as needed.

Author:

Peter Abeles

Constructor Summary

Constructors

Constructor and Description
NoCacheScaleSpace(ImageGenerator<I> inputGen, ImageGenerator<D> derivGen) Declares internal data structures.

Method Summary

Methods

Modifier and Type	Method and Description
BorderType	getBorderType() Returns how image borders are processed.
double	getCurrentScale() Returns the value of the current active scale.
D	getDerivative(boolean... isX) Computes derivative images using previously computed lower level derivatives.
double	getScale(int level) Returns the scale for the specified layer in the pyramid.
I	getScaledImage() Returns the scaled image at the active scale.
int	getTotalScales() Returns number of scaled images inside of this scale space.
void	setActiveScale(int index) Sets the active scale.
void	setBorderType(BorderType type) Change how image borders are handled.
void	setImage(I input) Specifies the original un-scaled image.
void	setScales(double... scales) Sets the scales/blur magnitudes for which the scale-space should be computed over.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NoCacheScaleSpace

public NoCacheScaleSpace(ImageGenerator<I> inputGen,
                 ImageGenerator<D> derivGen)

Declares internal data structures.

Parameters:

inputGen - Used to create image of the same type as the input.

derivGen - Used to create derivative images.

Method Detail

setScales

public void setScales(double... scales)

Description copied from interface: GaussianScaleSpace

Sets the scales/blur magnitudes for which the scale-space should be computed over.

Specified by:

setScales in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

Parameters:

scales - All the scales. These are absolute and not relative to the previous level.

getScale

public double getScale(int level)

Description copied from interface: GaussianScaleSpace

Returns the scale for the specified layer in the pyramid. This is equivalent to the standard deviation of the Gaussian convolved across the original input image.

Specified by:

getScale in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

setImage

public void setImage(I input)

Description copied from interface: GaussianScaleSpace

Specifies the original un-scaled image.

Specified by:

setImage in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

Parameters:

input - Original image.

setActiveScale

public void setActiveScale(int index)

Description copied from interface: GaussianScaleSpace

Sets the active scale. Must call GaussianScaleSpace.setImage(boofcv.struct.image.ImageSingleBand) before this function.

Specified by:

setActiveScale in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

Parameters:

index - Index of active scale

getCurrentScale

public double getCurrentScale()

Description copied from interface: GaussianScaleSpace

Returns the value of the current active scale.

Specified by:

getCurrentScale in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

Returns:

active scale.

getTotalScales

public int getTotalScales()

Description copied from interface: GaussianScaleSpace

Returns number of scaled images inside of this scale space.

Specified by:

getTotalScales in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

Returns:

Number of scales.

getScaledImage

public I getScaledImage()

Description copied from interface: GaussianScaleSpace

Returns the scaled image at the active scale.

Specified by:

getScaledImage in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

Returns:

scaled image.

setBorderType

public void setBorderType(BorderType type)

Description copied from interface: GaussianScaleSpace

Change how image borders are handled.

Specified by:

setBorderType in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

Parameters:

type - The BorderType.

getBorderType

public BorderType getBorderType()

Description copied from interface: GaussianScaleSpace

Returns how image borders are processed.

Specified by:

getBorderType in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

Returns:

how image borders are processed.

getDerivative

public D getDerivative(boolean... isX)

Computes derivative images using previously computed lower level derivatives. Only computes/declares images as needed.

Specified by:

getDerivative in interface GaussianScaleSpace<I extends ImageSingleBand,D extends ImageSingleBand>

Parameters:

isX - specifies which partial derivative is to be returned.

Returns:

The image's derivative.