com.emphysic.myriad.core.data.ops

Class GaussianPyramidOperation

java.lang.Object

com.emphysic.myriad.core.data.ops.GaussianPyramidOperation

All Implemented Interfaces:

DatasetOperation, ObjectMap, com.esotericsoftware.kryo.KryoSerializable

public class GaussianPyramidOperation
extends java.lang.Object
implements DatasetOperation

GaussianPyramidOperation - repeated smoothing and subsampling of an input. Primarily used to allow other operations to consider input data at multiple scales.

Constructor Summary

Constructors

Constructor and Description
GaussianPyramidOperation() Creates a new GaussianPyramidOperation with a GaussianBlur of radius 5, halves the size of the input at each step, and stops if the width and/or height of a step is less than 1.
GaussianPyramidOperation(BlurOperation blurOperation) Creates a new GaussianPyramidOperation with the specified blur op, halves the size of the input at each step, and stops if the width and/or height of a step is less than 1.
GaussianPyramidOperation(BlurOperation blurOp, int scaleFactor, int windowSize) Creates a new GaussianPyramidOperation
GaussianPyramidOperation(int scaleFactor, int windowSize) Creates a new GaussianPyramidOperation with no blur, halving the size at each step, and stopping if the width and/or height of a step is less than the specified window size.

Method Summary

Modifier and Type	Method and Description
BlurOperation	getBlur() Blur operation
java.util.Map<java.lang.String,java.lang.Object>	getObjectMap() Creates a map of the important fields for the instance, suitable for serialization.
int	getScaleFactor() Decimation factor - typically 2 to make each level of the pyramid 1/2 the size of its predecessor.
long	getSerializationVersion() Returns the current version of the serialization format.
int	getVersion() Returns the current class version.
int	getWindowSize() Size of the smallest level of the pyramid - stops when this threshold is reached.
void	initCurrentVersion(java.util.Map<java.lang.String,java.lang.Object> objectMap) Initializes an instance with a current-version object graph.
Dataset	run(Dataset input) Blurs and subsamples the input data.
void	setBlur(BlurOperation blur)
void	setScaleFactor(int scaleFactor) Decimation factor - typically 2 to make each level of the pyramid 1/2 the size of its predecessor.
void	setWindowSize(int windowSize) Sets the cutoff size of the pyramid - operation is complete when this threshold is reached

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.emphysic.myriad.core.data.util.ObjectMap

init, initPreviousVersion, initUnknownVersion, load, read, save, write

Constructor Detail

GaussianPyramidOperation

public GaussianPyramidOperation(BlurOperation blurOp,
                                int scaleFactor,
                                int windowSize)

Creates a new GaussianPyramidOperation

Parameters:

blurOp - blur operation

scaleFactor - scaling factor to use e.g. 2 to halve the size at each step

windowSize - size of the smallest step

GaussianPyramidOperation

public GaussianPyramidOperation()

Creates a new GaussianPyramidOperation with a GaussianBlur of radius 5, halves the size of the input at each step, and stops if the width and/or height of a step is less than 1.

GaussianPyramidOperation

public GaussianPyramidOperation(BlurOperation blurOperation)

Creates a new GaussianPyramidOperation with the specified blur op, halves the size of the input at each step, and stops if the width and/or height of a step is less than 1.

Parameters:

blurOperation - blur operation to use

GaussianPyramidOperation

public GaussianPyramidOperation(int scaleFactor,
                                int windowSize)

Creates a new GaussianPyramidOperation with no blur, halving the size at each step, and stopping if the width and/or height of a step is less than the specified window size. Primarily used for testing.

Parameters:

scaleFactor - scaling factor between successive steps, typically 2 for halving at each step

windowSize - size of the window

Method Detail

run

public Dataset run(Dataset input)

Blurs and subsamples the input data. Returns the results or null if the result is smaller than the operation's window in width or height.

Specified by:

run in interface DatasetOperation

Parameters:

input - Dataset on which to operate

Returns:

result

getBlur

public BlurOperation getBlur()

Blur operation

setBlur

public void setBlur(BlurOperation blur)

getScaleFactor

public int getScaleFactor()

Decimation factor - typically 2 to make each level of the pyramid 1/2 the size of its predecessor.

setScaleFactor

public void setScaleFactor(int scaleFactor)

Decimation factor - typically 2 to make each level of the pyramid 1/2 the size of its predecessor.

Parameters:

scaleFactor - scaling factor between succesive levels of the pyramid

getWindowSize

public int getWindowSize()

Size of the smallest level of the pyramid - stops when this threshold is reached.

setWindowSize

public void setWindowSize(int windowSize)

Sets the cutoff size of the pyramid - operation is complete when this threshold is reached

Parameters:

windowSize - new threshold

getSerializationVersion

public long getSerializationVersion()

Description copied from interface: ObjectMap

Returns the current version of the serialization format. Increments when the serialization format changes, i.e. backwards compatibility is broken.

Specified by:

getSerializationVersion in interface ObjectMap

Returns:

serialization version

getVersion

public int getVersion()

Description copied from interface: ObjectMap

Returns the current class version. Class version increments when the class changes but doesn't necessarily break compatibility with serialization.

Specified by:

getVersion in interface ObjectMap

Returns:

class version

getObjectMap

public java.util.Map<java.lang.String,java.lang.Object> getObjectMap()

Description copied from interface: ObjectMap

Creates a map of the important fields for the instance, suitable for serialization.

Specified by:

getObjectMap in interface ObjectMap

Returns:

"object map" of the instance

initCurrentVersion

public void initCurrentVersion(java.util.Map<java.lang.String,java.lang.Object> objectMap)

Description copied from interface: ObjectMap

Initializes an instance with a current-version object graph.

Specified by:

initCurrentVersion in interface ObjectMap

Parameters:

objectMap - object graph for initialization