Class ByteLookupTable

Constructor Detail

• ByteLookupTable

  public ByteLookupTable(int offset,
                 byte[][] 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

  data - an array of byte arrays representing a lookup table for each band

  Throws:

  IllegalArgumentException - if offset is is less than 0 or if the length of data is less than 1

• ByteLookupTable

  public ByteLookupTable(int offset,
                 byte[] 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

  data - an array of bytes

  Throws:

  IllegalArgumentException - if offset is is less than 0 or if the length of data is less than 1

Method Detail

• 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 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.

  Specified by:

  lookupPixel in class 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.

• 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.