java.awt.image

Class ByteLookupTable


public class ByteLookupTable
extends LookupTable

This class defines a lookup table object. The output of a lookup operation using an object of this class is interpreted as an unsigned byte quantity. The lookup table contains byte data arrays for one or more bands (or components) of an image, and it contains an offset which will be subtracted from the input values before indexing the arrays. This allows an array smaller than the native data size to be provided for a constrained input. If there is only one array in the lookup table, it will be applied to all bands.
See Also:
ShortLookupTable, LookupOp

Constructor Summary

ByteLookupTable(int offset, data[] )
Constructs a ByteLookupTable object from an array of bytes representing a lookup table to be applied to all bands.
ByteLookupTable(int offset, data[][] )
Constructs a ByteLookupTable object from an array of byte arrays representing a lookup table for each band.

Method Summary

byte[][]
getTable()
Returns the lookup table data by reference.
byte[]
lookupPixel(byte[] src, byte[] dst)
Returns an array of samples of a pixel, translated with the lookup table.
int[]
lookupPixel(int[] src, int[] dst)
Returns an array of samples of a pixel, translated with the lookup table.

Methods inherited from class java.awt.image.LookupTable

getNumComponents, getOffset, lookupPixel

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ByteLookupTable

public ByteLookupTable(int offset,
                       data[] )
Constructs a ByteLookupTable object from an array of bytes representing a lookup table to be applied to all bands. The offset will be subtracted from input values before indexing into the array. The data array is stored as a reference.
Parameters:
offset - the value subtracted from the input values before indexing into the array
Throws:
IllegalArgumentException - if offset is is less than 0 or if the length of data is less than 1
Usages and Demos :

View More Examples of ByteLookupTable(int offset,data[] )
   1: 
   2:         operation  =  new LookupOp(new ByteLookupTable(0, tableData), hints) 
   3:             { };
   4:     }
   5:     

View Full Code Here
   1: 
   2:         LookupTable table = new ByteLookupTable(0, lookup);
   3:         java.awt.image.LookupOp inverter = new java.awt.image.LookupOp(table, null);
   4: 
   5:         g.setPaint(Color.black);

View Full Code Here
   1:                     chlut[j]=(byte)(256-j); 
   2:                 ByteLookupTable blut=new ByteLookupTable(0,chlut); 
   3:                 LookupOp lop = new LookupOp(blut, null); 
   4:                 lop.filter(bi[i],bimg);  
   5:                 biop = new AffineTransformOp(at,

View Full Code Here
   1:     new RescaleOp(1.25f, 0, null),
   2:     new LookupOp(new ByteLookupTable(0, brightenTable), null),
   3:         ...
   4:     new LookupOp(new ByteLookupTable(0, thresholdTable), null),
   5:     new ConvolveOp(new Kernel(3, 3, new float[] {  
   6:         .1111f,.1111f,.1111f,
   7:         .1111f,.1111f,.1111f,

View Full Code Here
   1:     new RescaleOp(1.25f, 0, null),
   2:     new LookupOp(new ByteLookupTable(0, brightenTable), null),
   3:         ...
   4:     new LookupOp(new ByteLookupTable(0, thresholdTable), null),
   5:     new ConvolveOp(new Kernel(3, 3, new float[] {  
   6:         .1111f,.1111f,.1111f,
   7:         .1111f,.1111f,.1111f,

View Full Code Here

ByteLookupTable

public ByteLookupTable(int offset,
                       data[][] )
Constructs a ByteLookupTable object from an array of byte arrays representing a lookup table for each band. The offset will be subtracted from input values before indexing into the arrays. The number of bands is the length of the data argument. The data array for each band is stored as a reference.
Parameters:
offset - the value subtracted from the input values before indexing into the arrays
Throws:
IllegalArgumentException - if offset is is less than 0 or if the length of data is less than 1
Usages and Demos :

View More Examples of ByteLookupTable(int offset,data[][] )
   1: 
   2:         operation  =  new LookupOp(new ByteLookupTable(0, tableData), hints) 
   3:             { };
   4:     }
   5:     

View Full Code Here
   1: 
   2:         LookupTable table = new ByteLookupTable(0, lookup);
   3:         java.awt.image.LookupOp inverter = new java.awt.image.LookupOp(table, null);
   4: 
   5:         g.setPaint(Color.black);

View Full Code Here
   1:                     chlut[j]=(byte)(256-j); 
   2:                 ByteLookupTable blut=new ByteLookupTable(0,chlut); 
   3:                 LookupOp lop = new LookupOp(blut, null); 
   4:                 lop.filter(bi[i],bimg);  
   5:                 biop = new AffineTransformOp(at,

View Full Code Here
   1:     new RescaleOp(1.25f, 0, null),
   2:     new LookupOp(new ByteLookupTable(0, brightenTable), null),
   3:         ...
   4:     new LookupOp(new ByteLookupTable(0, thresholdTable), null),
   5:     new ConvolveOp(new Kernel(3, 3, new float[] {  
   6:         .1111f,.1111f,.1111f,
   7:         .1111f,.1111f,.1111f,

View Full Code Here
   1:     new RescaleOp(1.25f, 0, null),
   2:     new LookupOp(new ByteLookupTable(0, brightenTable), null),
   3:         ...
   4:     new LookupOp(new ByteLookupTable(0, thresholdTable), null),
   5:     new ConvolveOp(new Kernel(3, 3, new float[] {  
   6:         .1111f,.1111f,.1111f,
   7:         .1111f,.1111f,.1111f,

View Full Code Here

Method Details

getTable

public final byte[][] getTable()
Returns the lookup table data by reference. If this ByteLookupTable was constructed using a single byte array, the length of the returned array is one.
Returns:
the data array of this ByteLookupTable.

lookupPixel

public byte[] lookupPixel(byte[] src,
                          byte[] dst)
Returns an array of samples of a pixel, translated with the lookup table. The source and destination array can be the same array. Array dst is returned.
Parameters:
src - the source array.
dst - the destination array. This array must be at least as long as src. If dst is null, a new array will be allocated having the same length as src.
Returns:
the array dst, an int array of samples.
Throws:
ArrayIndexOutOfBoundsException - if src is longer than dst or if for any element i of src, (src[i]&0xff)-offset is either less than zero or greater than or equal to the length of the lookup table for any band.

lookupPixel

public int[] lookupPixel(int[] src,
                         int[] dst)
Returns an array of samples of a pixel, translated with the lookup table. The source and destination array can be the same array. Array dst is returned.
Overrides:
lookupPixel in interface LookupTable
Parameters:
src - the source array.
dst - the destination array. This array must be at least as long as src. If dst is null, a new array will be allocated having the same length as src.
Returns:
the array dst, an int array of samples.
Throws:
ArrayIndexOutOfBoundsException - if src is longer than dst or if for any element i of src, src[i]-offset is either less than zero or greater than or equal to the length of the lookup table for any band.