org.icepdf.core.pobjects.filters
Class CCITTFax

java.lang.Object
  org.icepdf.core.pobjects.filters.CCITTFax

public class CCITTFax
extends java.lang.Object

Many facsimile and document imaging file formats support a form of lossless data compression often described as CCITT encoding. The CCITT (International Telegraph and Telephone Consultative Committee) is a standards organization that has developed a series of communications protocols for the facsimile transmission of black-and-white images over telephone lines and data networks. These protocols are known officially as the CCITT T.4 and T.6 standards but are more commonly referred to as CCITT Group 3 and Group 4 compression, respectively.

The CCITT actually defines three algorithms for the encoding of bi-level image data: Group 3 One-Dimensional (G31D) Group 3 Two-Dimensional (G32D) - not implemented Group 4 Two-Dimensional (G42D)

Constructor Summary

CCITTFax()

Method Summary

static java.awt.image.BufferedImage	attemptDeriveBufferedImageFromBytes(ImageStream stream, Library library, java.util.HashMap streamDictionary, java.awt.Color fill)
static void	Group4Decode(java.io.InputStream in, java.io.OutputStream out, int width, boolean blackIs1)

Methods inherited from class java.lang.Object

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

Constructor Detail

CCITTFax

public CCITTFax()

Method Detail

Group4Decode

public static void Group4Decode(java.io.InputStream in,
                                java.io.OutputStream out,
                                int width,
                                boolean blackIs1)

Parameters:

in -

out -

width -

attemptDeriveBufferedImageFromBytes

public static java.awt.image.BufferedImage attemptDeriveBufferedImageFromBytes(ImageStream stream,
                                                                               Library library,
                                                                               java.util.HashMap streamDictionary,
                                                                               java.awt.Color fill)