Grok (JPEG 2000)
| Grok | |
|---|---|
| Developer | Aaron Boxer |
| Initial release | January 1, 2016 |
| Stable release | 20.0.5
/ January 25, 2026 |
| Written in | C++ |
| Operating system | macOS, Windows, POSIX |
| Platform | x86-64, AArch64 |
| Predecessor | libopenjp2 |
| Available in | English |
| Type | Graphics software |
| License | AGPL v3 |
| Website | github |
| Repository | |
Grok is a computer software library to encode and decode images in the JPEG 2000 format. It is designed for stability, high performance, and low memory usage. Grok is free and open-source software released under the GNU Affero General Public License (AGPL) version 3.
Grok was forked from OpenJPEG's libopenjp2 in April 2016 by Aaron Boxer under a copyleft license.One of his goals was to close the performance gap with the more efficient but proprietary Kakadu. Grok fully implements the ISO/IEC 15444-1 technical standard. As of 2024, the newer, complexity-reduced High-Throughput JPEG 2000 standard (HTJ2K, ISO/IEC 15444-15, ITU-T T.814) has been implemented, with both encoding and decoding support available.