Convert RLE to G3

The RLE (Run-Length Encoded) file extension, associated with the Utah Raster Toolkit, is a lossless image compression format used primarily for 4 or 8-bit bitmap images. Developed at the University of Utah, it employs run-length encoding to compress data by reducing consecutive repeated values, making it efficient for simple graphics like icons and line drawings. Historically, it was widely used in early versions of Windows and CompuServe software.

The G3 file extension refers to the CCITT Group 3 Fax Image, a standardized format developed by the Consultative Committee for International Telegraphy and Telephony (CCITT), now known as ITU-T. This format was created to efficiently compress black-and-white fax documents for transmission over telephone lines. It employs a method called Modified Huffman Coding for data compression, enabling reduced transmission time and bandwidth usage. G3 was widely adopted in the 1980s and 1990s as the primary standard for fax transmissions, ensuring compatibility across different fax machines and systems.