View source for TG4 (Image Machines)

{{FormatInfo
|formattype=electronic
|subcat=Graphics
|extensions={{ext|tg4}}
}}
:''See [[TG4]] for other formats with that name.''

'''TG4''' is a bi-level raster image format associated with Image Machines Corporation of Herndon, VA. It is used by their ''IMageCenter'' (often written with a capital ''M'') product, and maybe other products. It uses [[CCITT Group 4]] compression. TG4 stands for "Tiled CCITT Group 4".

It is similar, but generally not identical, to [[JEDMICS C4]] format, which was also designed by Image Machines.

== Identification ==
More research needed. Some files begin with (hex) {{magic|80 00 00 00}}, like [[JEDMICS C4]], but others do not.

== Specifications ==
* [https://hwiegman.home.xs4all.nl/fileformats/tg4/tg4.doc TG4 File Format] - Apparently an excerpt from IMageCenter User's Guide (MS Word format)