boofcv.alg.transform.pyramid

Class PyramidFloatGaussianScale<T extends ImageGray>

java.lang.Object

boofcv.struct.pyramid.ImagePyramidBase<T>

boofcv.struct.pyramid.PyramidFloat<T>

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

All Implemented Interfaces:

ImagePyramid<T>

public class PyramidFloatGaussianScale<T extends ImageGray>
extends PyramidFloat<T>

PyramidFloat in which each layer is constructed by 1) applying Gaussian blur to the previous layer, and then 2) re-sampling the blurred previous layer. The scaling factor between each level are floating point number. Unlike PyramidDiscreteSampleBlur the scale factors can be arbitrary and are not limited to certain integer values. The specified sigmas are the sigmas which are applied to each layer.

NOTE: This can be considered the theoretically correct way to construct an image pyramid with no sacrifices to improve speed.

Field Summary

Fields

Modifier and Type	Field and Description
protected InterpolatePixelS<T>	interpolate
protected double[]	sigma
protected float[]	sigmaLayers
protected T	tempImage

Fields inherited from class boofcv.struct.pyramid.PyramidFloat

scale

Fields inherited from class boofcv.struct.pyramid.ImagePyramidBase

bottomHeight, bottomWidth, generator, layers, saveOriginalReference

Constructor Summary

Constructors

Constructor and Description
PyramidFloatGaussianScale(InterpolatePixelS<T> interpolate, double[] scales, double[] sigmaLayers, java.lang.Class<T> imageType) Configures the pyramid

Method Summary

Modifier and Type	Method and Description
InterpolatePixelS<T>	getInterpolate()
double	getSampleOffset(int layer) Returns the sampling offset.
double	getSigma(int layer) Returns the scale-space scale for the specified layer.
float[]	getSigmaLayers()
void	process(T input) Constructs the image pyramid given the input image.
void	setInterpolate(InterpolatePixelS<T> interpolate)

Methods inherited from class boofcv.struct.pyramid.PyramidFloat

getNumLayers, getScale, 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

Field Detail

interpolate

protected InterpolatePixelS<T extends ImageGray> interpolate

tempImage

protected T extends ImageGray tempImage

sigmaLayers

protected float[] sigmaLayers

sigma

protected double[] sigma

Constructor Detail

PyramidFloatGaussianScale

public PyramidFloatGaussianScale(InterpolatePixelS<T> interpolate,
                                 double[] scales,
                                 double[] sigmaLayers,
                                 java.lang.Class<T> imageType)

Configures the pyramid

Parameters:

interpolate - Interpolation function used to sub-sample.

scales - Scales of each layer in the pyramid relative to the input image

sigmaLayers - Amount of blur applied to the previous layer while constructing the pyramid.

imageType - Type of image it's processing

Method Detail

process

public void process(T input)

Description copied from interface: ImagePyramid

Constructs the image pyramid given the input image.

getInterpolate

public InterpolatePixelS<T> getInterpolate()

setInterpolate

public void setInterpolate(InterpolatePixelS<T> interpolate)

getSampleOffset

public double getSampleOffset(int layer)

Description copied from interface: ImagePyramid

Returns the sampling offset. Both x and y axises are assumed to have the same offset. See comment in constructor above.

Parameters:

layer - Layer in the pyramid

Returns:

Sampling offset in pixels.

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.

getSigmaLayers

public float[] getSigmaLayers()