org.joone.io

Class ImageInputTokenizer

java.lang.Object

org.joone.io.ImageInputTokenizer

All Implemented Interfaces:

PatternTokenizer

public class ImageInputTokenizer
extends java.lang.Object
implements PatternTokenizer

This tokenizer is responsible for collecting data from a list of Image file names or Image objects and feeding the data from the Images into a tokenized array of values for feeding into the Neural network. GIF, JPG and PNG image file formats can be read. The tokenizer operates in two modes, colour and grey scale.

Colour Mode In colour mode the tokenizer produces seperate RGB input values in the range 0 to 1 from the image. So using an image of width 10 and height 10 there will be 10x10x3 inputs in the range 0 to 1. The individual colour components are calculated by obtaining the RGB values from the image. These value are initially in an ARGB format. Transparency is removed and the RGB value extracted and normalised between 0 and 1.

Non Colour Mode / Grey Scale Mode In this mode the tokenizer treats each input value as a grey scale value for each pixel. In this mode only Width*Height values are required. To produce the final image the Red, Green and Blue components are the set to this same value. The grey scale component is calculated by obtaining the RGB values from the image. These value are initially in an ARGB format. Transparency is removed and the RGB value extracted, averaged and normalised to produce one grey scale value between 0 and 1.

Constructor Summary

Constructors

Constructor and Description
ImageInputTokenizer(int req_width, int req_height, java.awt.Image[] the_images, boolean colour) Creates new ImageInputTokenizer
ImageInputTokenizer(int req_width, int req_height, java.util.Vector file_list, boolean colour) Creates new ImageInputTokenizer

Method Summary

Modifier and Type	Method and Description
char	getDecimalPoint()
int	getLineno() Return the current line number.
int	getNumTokens() Gets the number of tokens on the current line.
double	getTokenAt(int posiz) Gets the token (RGB normalised between 0 and 1) at the specified position.
double[]	getTokensArray() Insert the method's description here.
void	mark() Mark the current position.
boolean	nextLine() Fetchs the next line and extracts all the tokens
void	resetInput() Go to the last marked position.
void	setDecimalPoint(char dp)

Methods inherited from class java.lang.Object

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

Constructor Detail

ImageInputTokenizer

public ImageInputTokenizer(int req_width,
                           int req_height,
                           java.util.Vector file_list,
                           boolean colour)
                    throws java.io.IOException

Creates new ImageInputTokenizer

Parameters:

in -

Throws:

java.io.IOException

ImageInputTokenizer

public ImageInputTokenizer(int req_width,
                           int req_height,
                           java.awt.Image[] the_images,
                           boolean colour)
                    throws java.io.IOException

Creates new ImageInputTokenizer

Parameters:

in -

Throws:

java.io.IOException

Method Detail

getLineno

public int getLineno()

Return the current line number.

Specified by:

getLineno in interface PatternTokenizer

Returns:

the current line number

getNumTokens

public int getNumTokens()
                 throws java.io.IOException

Gets the number of tokens on the current line.

Specified by:

getNumTokens in interface PatternTokenizer

Throws:

java.io.IOException

getTokenAt

public double getTokenAt(int posiz)
                  throws java.io.IOException

Gets the token (RGB normalised between 0 and 1) at the specified position.

Specified by:

getTokenAt in interface PatternTokenizer

Parameters:

posiz - An int index into the current lines tokens.

Returns:

double The token (combined RGB) at the specified position on the current line.

Throws:

java.io.IOException

getTokensArray

public double[] getTokensArray()

Insert the method's description here. Creation date: (17/10/2000 0.13.45)

Specified by:

getTokensArray in interface PatternTokenizer

Returns:

float[]

mark

public void mark()
          throws java.io.IOException

Mark the current position.

Specified by:

mark in interface PatternTokenizer

Throws:

IOException - if an I/O Error occurs

nextLine

public boolean nextLine()
                 throws java.io.IOException

Fetchs the next line and extracts all the tokens

Specified by:

nextLine in interface PatternTokenizer

Returns:

false if EOF, otherwise true

Throws:

java.io.IOException - if an I/O Error occurs

resetInput

public void resetInput()
                throws java.io.IOException

Go to the last marked position. Begin of input stream if no mark detected.

Specified by:

resetInput in interface PatternTokenizer

Throws:

java.io.IOException

setDecimalPoint

public void setDecimalPoint(char dp)

Specified by:

setDecimalPoint in interface PatternTokenizer

getDecimalPoint

public char getDecimalPoint()

Specified by:

getDecimalPoint in interface PatternTokenizer