Convert EXR to G3

The EXR file extension stands for OpenEXR, a high dynamic range (HDR) image file format developed by Industrial Light & Magic (ILM) in 1999 for visual effects and film production. OpenEXR is widely used for its ability to store multi-channel, floating-point images, supporting complex visual effects workflows with superior image quality and precision. Its features include lossless and lossy compression, arbitrary image channels, and a flexible data structure, making it an essential tool in professional digital imaging and animation industries.

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.