GitHub - GrokImageCompression/grok: World's Leading Open Source JPEG 2000 Codec (original) (raw)

World's Leading Open Source JPEG 2000 Codec

Features

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

Grok in the News

1. Accelerating Grok With Blosc2
2. Generating Lossy Access JP2s With Grok

Performance

Grok can be integrated into the Geospatial Data Abstraction Layer (GDAL) software with this downstream driver. Below is a benchmark comparing decompression time performance for GDAL using JP2Grok, JP2KAK, and JP2OpenJPEG drivers.

Benchmark Details

• test system : 8 core / 16 thread CPU running Fedora 42 with 6.10 Linux kernel and btrfs file system
• Grok 20.0.0, Kakadu 8.4.1 and OpenJPEG 2.5.4 were used, configured to use all 16 threads
• Grok was built in release mode using GCC 15.2
• Linux page cache was cleared before each local file decompression
• decompress command: gdal_translate <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>F</mi><mi>I</mi><mi>L</mi><mi>E</mi><mo>−</mo><mi>i</mi><mi>f</mi></mrow><annotation encoding="application/x-tex">FILE -if </annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.7667em;vertical-align:-0.0833em;"></span><span class="mord mathnormal" style="margin-right:0.13889em;">F</span><span class="mord mathnormal" style="margin-right:0.07847em;">I</span><span class="mord mathnormal">L</span><span class="mord mathnormal" style="margin-right:0.05764em;">E</span><span class="mspace" style="margin-right:0.2222em;"></span><span class="mbin">−</span><span class="mspace" style="margin-right:0.2222em;"></span></span><span class="base"><span class="strut" style="height:0.8889em;vertical-align:-0.1944em;"></span><span class="mord mathnormal">i</span><span class="mord mathnormal" style="margin-right:0.10764em;">f</span></span></span></span>DRIVER output.tif

Test Files

• Spot 6 (Network Storage): 26624 x 26624 image, 4 components, TLM, lossless, 12-bit, 2048 x 2048 tiles, 10 layers, stored on MinIO with 20 ms latency.
• Spot 6 (Local Storage): 26624 x 26624 image, 4 components, TLM, lossless, 12-bit, 2048 x 2048 tiles, 10 layers, stored locally.
• Pleiades (Region): 82704 x 81100 image, 8000 x 8000 region at (50000,50000), 1 component, TLM, lossy, 16-bit, 1024 x 1024 tiles, 15 layers, stored locally.

Results

Library Details

• INSTALL
• WIKI
• LICENSE

Current Build Status

Contact

For more information please contact :

info@grokcompression.com