Package com.openstego.desktop

Class DataHidingPlugin<C extends OpenStegoConfig>

java.lang.Object

com.openstego.desktop.OpenStegoPlugin<C>

com.openstego.desktop.DataHidingPlugin<C>

public abstract class DataHidingPlugin<C extends OpenStegoConfig>
extends OpenStegoPlugin<C>

Abstract class for stego plugins for OpenStego purpose of which is data hiding. It implements few methods which are specific for data hiding, and provides dummy implementation for the methods which are specific to watermarking purposes so that sub-class does not need to implement them

See Also:

WatermarkingPlugin

Nested Class Summary

Nested classes/interfaces inherited from class com.openstego.desktop.OpenStegoPlugin

OpenStegoPlugin.Purpose

Field Summary

Fields inherited from class com.openstego.desktop.OpenStegoPlugin

config

Constructor Summary

Constructors

Constructor	Description
DataHidingPlugin()

Method Summary

Modifier and Type	Method	Description
byte[]	generateSignature()	Method to generate the signature data.
double	getHighWatermarkLevel()	Method to get correlation value which above which it can be considered that watermark strength is high
double	getLowWatermarkLevel()	Method to get correlation value which below which it can be considered that watermark strength is low
List<OpenStegoPlugin.Purpose>	getPurposes()	Gives the purpose(s) of the plugin.
double	getWatermarkCorrelation(byte[] origSigData, byte[] watermarkData)	Method to check the correlation between original signature and the extracted watermark.

Methods inherited from class com.openstego.desktop.OpenStegoPlugin

checkMark, createConfig, createConfig, embedData, extractData, extractMsgFileName, getConfig, getDescription, getDiff, getEmbedOptionsUI, getName, getPurposesLabel, getReadableFileExtensions, getUsage, getWritableFileExtensions, populateStdCmdLineOptions, resetConfig, resetConfig

Methods inherited from class java.lang.Object

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

Constructor Detail

DataHidingPlugin

public DataHidingPlugin()

Method Detail

getPurposes

public final List<OpenStegoPlugin.Purpose> getPurposes()

Gives the purpose(s) of the plugin. This implementation returns only one value - Data Hiding

Specified by:

getPurposes in class OpenStegoPlugin<C extends OpenStegoConfig>

Returns:

Purpose(s) of the plugin

generateSignature

public final byte[] generateSignature()

Method to generate the signature data. This implementation returns null as this class is for data hiding plugins only

Specified by:

generateSignature in class OpenStegoPlugin<C extends OpenStegoConfig>

Returns:

Signature data

getWatermarkCorrelation

public final double getWatermarkCorrelation(byte[] origSigData,
                                            byte[] watermarkData)

Method to check the correlation between original signature and the extracted watermark. This implementation returns 0.0 as this class is for data hiding plugins only

Specified by:

getWatermarkCorrelation in class OpenStegoPlugin<C extends OpenStegoConfig>

Parameters:

origSigData - Original signature data

watermarkData - Extracted watermark data

Returns:

Correlation

getHighWatermarkLevel

public double getHighWatermarkLevel()

Method to get correlation value which above which it can be considered that watermark strength is high

Specified by:

getHighWatermarkLevel in class OpenStegoPlugin<C extends OpenStegoConfig>

Returns:

High watermark

getLowWatermarkLevel

public double getLowWatermarkLevel()

Method to get correlation value which below which it can be considered that watermark strength is low

Specified by:

getLowWatermarkLevel in class OpenStegoPlugin<C extends OpenStegoConfig>

Returns:

Low watermark