NIFF (Navy Image File Format)
NIFF (Navy Image File Format) is a raster image file format. It is incorporated into the CALS raster standard as CALS Raster Type 3.
NIFF images are uncompressed, or use CCITT Group 4 compression. As of version 1, only bi-level images are supported.
Not to be confused with Notation Interchange File Format, a more common format named NIFF.
NIFF is a TIFF-like format, but it has a different file header, and other differences.
Files begin with signature bytes
49 49 4E 31 (ASCII "
- MIL-PRF-28002C Appendix A