com.openstego.desktop

Class WatermarkingPlugin

java.lang.Object

com.openstego.desktop.OpenStegoPlugin

com.openstego.desktop.WatermarkingPlugin

public abstract class WatermarkingPlugin
extends OpenStegoPlugin

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

See Also:

DataHidingPlugin

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 and Description
WatermarkingPlugin()

Method Summary

Modifier and Type	Method and Description
boolean	canHandle(byte[] stegoData) Method to find out whether given stego data can be handled by this plugin or not.
java.lang.String	extractMsgFileName(byte[] stegoData, java.lang.String stegoFileName) Method to extract the message file name from the stego data.
double	getHighWatermarkLevel() Method to get correlation value which above which it can be considered that watermark strength is high (default to 0.5 which is safe for general watermarking)
double	getLowWatermarkLevel() Method to get correlation value which below which it can be considered that watermark strength is low (default to 0.2 which is safe for general watermarking)
java.util.List<OpenStegoPlugin.Purpose>	getPurposes() Gives the purpose(s) of the plugin.

Methods inherited from class com.openstego.desktop.OpenStegoPlugin

checkMark, createConfig, createConfig, createConfig, embedData, extractData, generateSignature, getConfig, getConfigClass, getDescription, getDiff, getEmbedOptionsUI, getName, getPurposesLabel, getReadableFileExtensions, getUsage, getWatermarkCorrelation, getWritableFileExtensions, populateStdCmdLineOptions

Methods inherited from class java.lang.Object

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

Constructor Detail

WatermarkingPlugin

public WatermarkingPlugin()

Method Detail

getPurposes

public final java.util.List<OpenStegoPlugin.Purpose> getPurposes()

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

Specified by:

getPurposes in class OpenStegoPlugin

Returns:

Purpose(s) of the plugin

extractMsgFileName

public final java.lang.String extractMsgFileName(byte[] stegoData,
                                                 java.lang.String stegoFileName)
                                          throws OpenStegoException

Method to extract the message file name from the stego data. This implementation returns null as this class is for watermarking plugins only

Specified by:

extractMsgFileName in class OpenStegoPlugin

Parameters:

stegoData - Stego data containing the message

stegoFileName - Name of the stego file

Returns:

Message file name

Throws:

OpenStegoException

getHighWatermarkLevel

public double getHighWatermarkLevel()
                             throws OpenStegoException

Method to get correlation value which above which it can be considered that watermark strength is high (default to 0.5 which is safe for general watermarking)

Specified by:

getHighWatermarkLevel in class OpenStegoPlugin

Returns:

High watermark

Throws:

OpenStegoException

getLowWatermarkLevel

public double getLowWatermarkLevel()
                            throws OpenStegoException

Method to get correlation value which below which it can be considered that watermark strength is low (default to 0.2 which is safe for general watermarking)

Specified by:

getLowWatermarkLevel in class OpenStegoPlugin

Returns:

Low watermark

Throws:

OpenStegoException

canHandle

public final boolean canHandle(byte[] stegoData)

Method to find out whether given stego data can be handled by this plugin or not. This implementation returns false as this class is for watermarking plugins only

Specified by:

canHandle in class OpenStegoPlugin

Parameters:

stegoData - Stego data containing the message

Returns:

Boolean indicating whether the stego data can be handled by this plugin or not