Package boofcv.alg.feature.detect.interest

Class UnrollSiftScaleSpaceGradient

java.lang.Object

boofcv.alg.feature.detect.interest.UnrollSiftScaleSpaceGradient

public class UnrollSiftScaleSpaceGradient
extends Object

Precomputes the gradient for all scales in the scale-space and saves them in a list. Since it saves the entire scale space it can take up a bit of memory, but allows quick random look up of images.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	UnrollSiftScaleSpaceGradient.ImageScale	The gradient for an image in the scale space.

Constructor Summary

Constructors

Constructor	Description
UnrollSiftScaleSpaceGradient()

Method Summary

Modifier and Type	Method	Description
GrayF32	getDerivX(byte octaveIdx, byte scaleIdx)
GrayF32	getDerivY(byte octaveIdx, byte scaleIdx)
void	initialize(SiftScaleSpace scaleSpace)	Initializes data structures given the scale-space
UnrollSiftScaleSpaceGradient.ImageScale	lookup(double sigma)	Looks up the image which is closest specified sigma
void	process(SiftScaleSpace scaleSpace)	Sets the input image.

Methods inherited from class java.lang.Object

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

Constructor Details

UnrollSiftScaleSpaceGradient

public UnrollSiftScaleSpaceGradient()

Method Details

initialize

public void initialize(SiftScaleSpace scaleSpace)

Initializes data structures given the scale-space

process

public void process(SiftScaleSpace scaleSpace)

Sets the input image. Scale-space is computed and unrolled from this image

lookup

public UnrollSiftScaleSpaceGradient.ImageScale lookup(double sigma)

Looks up the image which is closest specified sigma

getDerivX

public GrayF32 getDerivX(byte octaveIdx,
 byte scaleIdx)

getDerivY

public GrayF32 getDerivY(byte octaveIdx,
 byte scaleIdx)