BuffImgEncoder

java.lang.Object
- steganography.image.encoders.BuffImgEncoder

Direct Known Subclasses:

PixelBit
```
public abstract class BuffImgEncoder
extends java.lang.Object
```
This is a superclass to algorithms which encode and decode payloads into images using PixelCoordinateOverlays as image representation.

Field Summary

Fields
Modifier and Type Field Description

protected PixelCoordinateOverlay overlay

Constructor Summary

Constructors
Constructor	Description
`BuffImgEncoder(PixelCoordinateOverlay overlay)`	This is a superclass to algorithms which encode and decode payloads into images using PixelCoordinateOverlays as image representation.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract byte[]`	`decode(int bLength)`	Decodes pixels in the sequence provided by the overlay (given to the constructor) according to its algorithm.
`abstract void`	`encode(byte[] payload)`	Encodes the payload in the sequence of pixels provided by the overlay given to the constructor.
`PixelCoordinateOverlay`	`getOverlay()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - overlay
```
protected PixelCoordinateOverlay overlay
```
- Constructor Detail
  - BuffImgEncoder
```
public BuffImgEncoder(PixelCoordinateOverlay overlay)
```
    This is a superclass to algorithms which encode and decode payloads into images using PixelCoordinateOverlays as image representation.
    
    Parameters:
    
    overlay - PixelCoordinateOverlay to get pixels from
- Method Detail
  - getOverlay
```
public PixelCoordinateOverlay getOverlay()
```
  - encode
```
public abstract void encode(byte[] payload)
                     throws ImageCapacityException
```
    Encodes the payload in the sequence of pixels provided by the overlay given to the constructor.
    
    Parameters:
    
    payload - payload or "message" to encode
    
    Throws:
    
    ImageCapacityException - if the payload is larger than the available pixels
  - decode
```
public abstract byte[] decode(int bLength)
```
    Decodes pixels in the sequence provided by the overlay (given to the constructor) according to its algorithm. Returns the result as a byte array.
    
    Decoding will continue until the byte arrays length is equal to bLength.
    
    Parameters:
    
    bLength - number of bytes to decode
    
    Returns:
    
    decoded bytes