- Extension
- .g4
- .brf
- Format
- Binary
- Category
- Fax
- Other
- Developer
- Computer Fax Systems (CFS)
- Duxbury Systems
- Description
- Group 4 (G4) used for black and white lossless compression to maintain high-quality images, commonly used in TIFF format compression by fax machines. A picture is seen as black dots and lines on a blank page; the fewer the dots and lines are, the lesser the file size.
- BRF files are braille formatted files that have plain texts with hard page ejects and hard returns. They are non-proprietary standard files for sighted viewing and related to Duxbury Braille Translator.
- MIME Type
- image/g4fax
- text/plain
