water.util

Class MathUtils.DCT

java.lang.Object

water.util.MathUtils.DCT

Enclosing class:

MathUtils

public static class MathUtils.DCT
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
DCT()

Method Summary

Modifier and Type	Method and Description
static void	initCheck(Frame input, int width, int height, int depth)
static Frame	transform1D(Frame input, int N, boolean inverse) Compute the 1D discrete cosine transform for each row in the given Frame, and return a new Frame
static Frame	transform2D(Frame input, int height, int width, boolean inverse) Compute the 2D discrete cosine transform for each row in the given Frame, and return a new Frame
static Frame	transform3D(Frame input, int height, int width, int depth, boolean inverse) Compute the 3D discrete cosine transform for each row in the given Frame, and return a new Frame

Methods inherited from class java.lang.Object

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

Constructor Detail

DCT

public DCT()

Method Detail

initCheck

public static void initCheck(Frame input,
                             int width,
                             int height,
                             int depth)

transform1D

public static Frame transform1D(Frame input,
                                int N,
                                boolean inverse)

Compute the 1D discrete cosine transform for each row in the given Frame, and return a new Frame

Parameters:

input - Frame containing numeric columns with data samples

N - Number of samples (must be less or equal than number of columns)

inverse - Whether to compute the inverse

Returns:

Frame containing 1D (inverse) DCT of each row (same dimensionality)

transform2D

public static Frame transform2D(Frame input,
                                int height,
                                int width,
                                boolean inverse)

Compute the 2D discrete cosine transform for each row in the given Frame, and return a new Frame

Parameters:

input - Frame containing numeric columns with data samples

height - height

width - width

inverse - Whether to compute the inverse

Returns:

Frame containing 2D DCT of each row (same dimensionality)

transform3D

public static Frame transform3D(Frame input,
                                int height,
                                int width,
                                int depth,
                                boolean inverse)

Compute the 3D discrete cosine transform for each row in the given Frame, and return a new Frame

Parameters:

input - Frame containing numeric columns with data samples

height - height

width - width

depth - depth

inverse - Whether to compute the inverse

Returns:

Frame containing 3D DCT of each row (same dimensionality)