boofcv.alg.transform.pyramid

Class PyramidDiscreteAverage<T extends ImageSingleBand>

java.lang.Object

boofcv.struct.pyramid.ImagePyramidBase<T>

boofcv.struct.pyramid.PyramidDiscrete<T>

boofcv.alg.transform.pyramid.PyramidDiscreteAverage<T>

All Implemented Interfaces:

ImagePyramid<T>

public class PyramidDiscreteAverage<T extends ImageSingleBand>
extends PyramidDiscrete<T>

Creates an image pyramid by down sampling square regions using .

Author:

Peter Abeles

Field Summary

Fields inherited from class boofcv.struct.pyramid.PyramidDiscrete

scale

Fields inherited from class boofcv.struct.pyramid.ImagePyramidBase

bottomHeight, bottomWidth, generator, layers, saveOriginalReference

Constructor Summary

Constructors

Constructor and Description
PyramidDiscreteAverage(Class<T> imageType, boolean saveOriginalReference, int... scaleFactors)

Method Summary

Methods

Modifier and Type	Method and Description
double	getSampleOffset(int layer) The center of the sampling kernel is 1/2 the square region's width
double	getSigma(int layer) Returns the scale-space scale for the specified layer.
void	process(T input) Constructs the image pyramid given the input image.

Methods inherited from class boofcv.struct.pyramid.PyramidDiscrete

getNumLayers, getScale, getScales, setScaleFactors

Methods inherited from class boofcv.struct.pyramid.ImagePyramidBase

checkScales, getHeight, getImageType, getInputHeight, getInputWidth, getLayer, getWidth, initialize, isSaveOriginalReference, setFirstLayer, setTo

Methods inherited from class java.lang.Object

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

Constructor Detail

PyramidDiscreteAverage

public PyramidDiscreteAverage(Class<T> imageType,
                      boolean saveOriginalReference,
                      int... scaleFactors)

Parameters:

imageType - Type of image processed

saveOriginalReference - If a reference to the full resolution image should be saved instead of copied. Set to false if you don't know what you are doing.

scaleFactors - Scale factor for each layer in the pyramid relative to the input layer

Method Detail

process

public void process(T input)

Description copied from interface: ImagePyramid

Constructs the image pyramid given the input image.

getSampleOffset

public double getSampleOffset(int layer)

The center of the sampling kernel is 1/2 the square region's width

Parameters:

layer - Layer in the pyramid

Returns:

offset

getSigma

public double getSigma(int layer)

Description copied from interface: ImagePyramid

Returns the scale-space scale for the specified layer. This scale is equivalent amount of Gaussian blur applied to the input image. If Gaussian blur is not applied to each layer then an approximation should be returned.

Parameters:

layer - Layer in the pyramid

Returns:

Equivalent sigma for Gaussian blur.