Grok (JPEG 2000) explained

Grok
Developer:	Aaron Boxer
Latest Release Version:	12.0.1
Latest Release Date:	^[1]
Programming Language:	C++
Operating System:	macOS, Windows, POSIX
Platform:	x86-64, AArch64
Language:	English
Genre:	Graphics software
License:	AGPL v3

In computer software, Grok is a library to encode and decode images in the JPEG 2000 format. It fully implements the ISO/IEC 15444-1 technical standard. 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.

Features

1. support for High Throughput JPEG 2000 (HTJ2K) encode/decode
2. fast random-access sub-image decoding using TLM markers
3. full encode/decode support for ICC colour profiles
4. full encode/decode support for XML,IPTC, XMP and EXIF meta-data
5. full encode/decode support for monochrome, sRGB, palette, YCC, extended YCC, CIELab and CMYK colour spaces
6. full encode/decode support for JPEG,PNG,BMP,TIFF,RAW,PNM and PAM image formats
7. full encode/decode support for 1-16 bit precision images
8. supported platforms: Linux x86-64, Linux AArch64, Windows, macOS and WebAssembly

Integration

Grok has been integrated into a number of other open source projects, including:

1. Cantaloupe image server
2. IIPSrv image server
3. Horos medical image viewer

Further reading

• "JPEG2000 Image Compression Fundamentals, Standards and Practice", by David S. Taubman, Michael W. Marcellin.
• JPEG 2000 for Long-term Preservation: JP2 as a Preservation Format. 10.1045/may2011-vanderknijff. Johan van der Knijff. D-Lib Magazine . 2011 . 17 . 5/6 . free.
• Generating lossy access JP2s from lossless preservation masters. Johan van der Knijff. 2022.

External links

• • User guide

See also

• OpenJPEG
• Kakadu

Notes and References

1. Web site: Releases · GrokImageCompression/grok . github.com . 2022-04-01.