This bitmap format is used in the Kodak DC series family of cameras. It is also known under the name Kodak Photogen. KDC is a RAW photo format for the post-processing of photos that has the ability to change key image parameters while maintaining the original level of detail.
This format is used to compress TIFF images when sending them via fax machines. This format helps reduce the data transmission time. Group 3 eliminates redundant data during compression in order to reduce file size. The standard 10:1 compression ratio may be increased to the user's preferences, but it can lead to a significant loss of image quality.