huffman encoding for cciitt fax group 3

[roseta]

hello,

I want to have the huffman encoding for .tif files that are used to
compress it for sending fax.
It is for black and white files.

any information espicially algorithm or the code is much appriciated.

Thanks in advance
roseta.

[roseta]

hello,

I found some information and code about this huffman compression method
(which is also called T4) on FAQ of this group.
it is in part one of FAQ but all these code are just for this method
or not because there is no explanation in the document. can any one
give me some help here?

thanks in advance
roseta

[toby]

Post by roseta
hello,
I found some information and code about this huffman compression method
(which is also called T4) on FAQ of this group.
it is in part one of FAQ but all these code are just for this method
or not because there is no explanation in the document. can any one
give me some help here?

Use an existing library and save yourself 9 months of work:
http://www.libtiff.org/

Post by roseta
thanks in advance
roseta

[Chris Giese]

Post by roseta
I found some information and code about this huffman compression method
(which is also called T4) on FAQ of this group.
it is in part one of FAQ but all these code are just for this method
or not because there is no explanation in the document. can any one
give me some help here?

http://www.rfc-editor.org/rfc/rfc804.txt

Some TIFF files use two-dimensional fax compression (T.6).
The T.6 specification is not freely available, but you might
be able to figure it out from the libTIFF source code.