boofcv.factory.transform.wavelet

Class FactoryWaveletDaub

java.lang.Object

boofcv.factory.transform.wavelet.FactoryWaveletDaub

public class FactoryWaveletDaub
extends java.lang.Object

Creates different variety of Daubechie (Daub) wavelets. For Daub-J and Daub J/K wavelets the index number refers to the number of coefficients. These wavelets are often used in image compression.

Citations:
James S. Walker, "A Primer on WAVELETS and Their Scientific Applications," 2nd Ed. 2008

Constructor Summary

Constructors

Constructor and Description
FactoryWaveletDaub()

Method Summary

Modifier and Type	Method and Description
static WaveletDescription<WlCoef_F32>	biorthogonal_F32(int J, BorderType borderType) Daub J/K biorthogonal wavelets have the following properties: DO NOT conserve the signal's energy If the signal is approximately polynomial of degree (J-1)/2-1 within the support then fluctuations are approximately zero. The sum of the scaling numbers is 1 The sum of the wavelet numbers is 0
static WaveletDescription<WlCoef_I32>	biorthogonal_I32(int J, BorderType borderType) Integer version of biorthogonal_F32(int, boofcv.core.image.border.BorderType).
static WlBorderCoefFixed<WlCoef_I32>	convertToInt(WlBorderCoefFixed<WlCoef_F32> orig, WlCoef_I32 inner)
static WaveletDescription<WlCoef_F32>	daubJ_F32(int J) DaubJ wavelets have the following properties: Conserve the signal's energy If the signal is approximately polynomial of degree J/2-1 or less within the support then fluctuations are approximately zero. The sum of the scaling numbers is sqrt(2) The sum of the wavelet numbers is 0

Methods inherited from class java.lang.Object

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

Constructor Detail

FactoryWaveletDaub

public FactoryWaveletDaub()

Method Detail

daubJ_F32

public static WaveletDescription<WlCoef_F32> daubJ_F32(int J)

DaubJ wavelets have the following properties:

• Conserve the signal's energy
• If the signal is approximately polynomial of degree J/2-1 or less within the support then fluctuations are approximately zero.
• The sum of the scaling numbers is sqrt(2)
• The sum of the wavelet numbers is 0

Parameters:

J - The wavelet's degree.

Returns:

Description of the DaubJ wavelet.

biorthogonal_F32

public static WaveletDescription<WlCoef_F32> biorthogonal_F32(int J,
                                                              BorderType borderType)

Daub J/K biorthogonal wavelets have the following properties:

• DO NOT conserve the signal's energy
• If the signal is approximately polynomial of degree (J-1)/2-1 within the support then fluctuations are approximately zero.
• The sum of the scaling numbers is 1
• The sum of the wavelet numbers is 0

Parameters:

J - The wavelet's degree. K = J-2.

borderType - How image borders are handled.

Returns:

Description of the Daub J/K wavelet.

biorthogonal_I32

public static WaveletDescription<WlCoef_I32> biorthogonal_I32(int J,
                                                              BorderType borderType)

Integer version of biorthogonal_F32(int, boofcv.core.image.border.BorderType).

Parameters:

J - The wavelet's degree. K = J-2.

borderType - How image borders are handled.

Returns:

Description of the Daub J/K wavelet.

convertToInt

public static WlBorderCoefFixed<WlCoef_I32> convertToInt(WlBorderCoefFixed<WlCoef_F32> orig,
                                                         WlCoef_I32 inner)