Package steganography.util

Interface ImageStegIO

All Known Implementing Classes:

ImageStegIOJava

public interface ImageStegIO

Classes which implement this interface exist to handle reading and writing of images to and from byte arrays as well as choosing the appropriate encoders (and their overlays) for the given image. They hold on to the image during its en- or decoding.

Method Summary

Modifier and Type	Method	Description
BuffImgEncoder	getEncoder(long seed)	Determines and returns the suitable encoder (and overlay) for the image according to its type.
java.lang.String	getFormat()	Returns the images format.
byte[]	getImageAsByteArray()	Returns the image in its current state (Output-Image) as a byte Array.

Method Detail

getImageAsByteArray

byte[] getImageAsByteArray()
                    throws java.io.IOException,
                           ImageWritingException

Returns the image in its current state (Output-Image) as a byte Array.

Returns:

the image in its current state as a byte array

Throws:

java.io.IOException - if there was an error during writing of BufferedImage to a byte array

ImageWritingException - if the image was not written to a byte array for unknown reasons

getFormat

java.lang.String getFormat()
                    throws UnsupportedImageTypeException,
                           java.io.IOException,
                           NoImageException

Returns the images format.

Returns:

the images format (png, bmp, ...) as a String

Throws:

UnsupportedImageTypeException - if the image type read from input is not supported

java.io.IOException - if there was an error during reading of input

NoImageException - if no image could be read from input

getEncoder

BuffImgEncoder getEncoder(long seed)
                   throws UnsupportedImageTypeException,
                          java.io.IOException,
                          NoImageException

Determines and returns the suitable encoder (and overlay) for the image according to its type.

Parameters:

seed - to hand to the overlay

Returns:

BuffImgEncoder with set PixelCoordinateOverlay, chosen accordingly to the images type

Throws:

UnsupportedImageTypeException - if the images type is not supported by any known encoder / overlay

java.io.IOException - if there was an error during reading of input

NoImageException - if no image could be read from input