NBLI (v0.4) is a fast, better lossless compression algorithm, which support RGB 24-bit and Gray 8-bit image. This repo provide:
- fNBLI : The optimized NBLI, currently only provide executable file rather than source code.
- NBLI : The prototype of NBLI, provide both executable file and source code.
Compared to the popular state-of-the-art lossless image formats, fNBLI is outstanding in both speed and compression ratio:
- The compression ratio of fNBLI is between JPEG-XL(-6) and JPEG-XL(-8)
- fNBLI compresses as same faster as JPEG-XL(-1)
- fNBLI decompresses faster than PNG and JPEG-XL(-1)
| Lossless Formats | Compressed Size (vs. PNG) | Compress Speed | Decompress Speed |
|---|---|---|---|
| BMF (-s) | -35.07% | 1.3 MB/s | 1.5 MB/s |
| Gralic | -34.32% | 4.2 MB/s | 3.5 MB/s |
| NBLI (-ga) | -30.37% | 14.7 MB/s | 17.0 MB/s |
| JPEG-XL (-e 8) | -30.25% | 0.6 MB/s | 14.5 MB/s |
| fNBLI | -29.79% | 94.8 MB/s | 149.1 MB/s |
| JPEG-XL (-e 6) | -28.63% | 2.4 MB/s | 19.1 MB/s |
| JPEG-XL (-e 3) | -26.53% | 19.2 MB/s | 27.9 MB/s |
| QLIC2 | -23.31% | 136.9 MB/s | 135.7 MB/s |
| WEBP -5 | -22.53% | 3.7 MB/s | 82.8 MB/s |
| JPEG-XL (-e 1) | -13.49% | 95.2 MB/s | 71.0 MB/s |
| PNG (optimized) | 0.00% | 0.9 MB/s | 153.7 MB/s |
| JPEG2000 | +4.60% | 12.8 MB/s | 14.9 MB/s |
| PNG | +5.13% | 12.2 MB/s | 121.5 MB/s |
| QOI | +19.68% | 214.7 MB/s | 215.7 MB/s |
| Uncompressed | +114.77% |
The dataset of above comparison is the training image set of CLIC2021 competition, which includes 585 RGB 24-bit images, totaling 4GB (the downloaded zip file is about 2GB). All above compressor/decompressor are tested in single-threaded, See Lossless-Image-Compression-Benchmark for detail.
If you installed MinGW Compiler for Windows, you can run following command to compile NBLI, getting the executable file NBLI.exe
g++ src_NBLI\main.cpp src_NBLI\imageio\*.cpp src_NBLI\NBLI\NBLI.cpp -static-libgcc -static-libstdc++ -O3 -Wall -o NBLI.exeRun following command to compile NBLI, getting the binary file NBLI
g++ src_NBLI/main.cpp src_NBLI/imageio/*.cpp src_NBLI/NBLI/NBLI.cpp -static-libgcc -static-libstdc++ -O3 -Wall -o NBLI
Run fNBLI.exe without any parameters to display its usage:
> .\fNBLI.exe
|----------------------------------------------------------------------------------|
| fNBLI : fast new-bee lossless image codec (single-threaded, v0.4, 202409) |
| Copyright (C) 2024 Xuan Wang. |
|----------------------------------------------------------------------------------|
| this CPU: AVX2 supported |
|----------------------------------------------------------------------------------|
| Usage: |
| fNBLI [-switches] <in1> [-o <out1>] [<in2> [-o <out2]] ... |
| |
| To compress: |
| <in> can be .bmp, .png, .pgm, .ppm, .pnm, or .qoi (RGB-24bit or Gray-8bit) |
| <out> can be .fnbli. It will be generated if not specified. |
| |
| To decompress: |
| <in> can be .fnbli |
| <out> can be .bmp, .jls, .pgm, .ppm, .pnm, or .qoi |
| It will be generated if not specified. |
| |
| switches: -v : verbose |
| -f : force overwrite of output file |
| -x : putting CRC32 when compressing |
|----------------------------------------------------------------------------------|Take the images I provided in the ./image/ folder as examples :
Compress a .pgm file (Gray image) to a .fnbli file :
fNBLI.exe -vf image\Gray.pgm -o Gray.fnbliCompress a .ppm file (RGB image) to a .fnbli file :
fNBLI.exe -vf image\RGB.ppm -o RGB.fnbliCompress a .png file to .fnbli file :
fNBLI.exe -vf image\RGB.png -o RGB.fnbliDecompress the .fnbli file back to a .ppm file :
fNBLI.exe -vf RGB.fnbli -o RGB.ppmDecompress the .fnbli file back to a .bmp file :
fNBLI.exe -vf RGB.fnbli -o RGB.bmp
Run NBLI.exe without any parameters to display its usage:
> .\NBLI.exe
|----------------------------------------------------------------------------------|
| NBLI : new-bee lossless image codec (single-threaded, v0.4, 202409) |
| Copyright (C) 2024 Xuan Wang. |
|----------------------------------------------------------------------------------|
| Usage: |
| NBLI [-switches] <in1> [-o <out1>] [<in2> [-o <out2]] ... |
| |
| To compress: |
| <in> can be .bmp, .png, .pgm, .ppm, .pnm, or .qoi (RGB-24bit or Gray-8bit) |
| <out> can be .nbli. It will be generated if not specified. |
| |
| To decompress: |
| <in> can be .nbli |
| <out> can be .bmp, .jls, .pgm, .ppm, .pnm, or .qoi |
| It will be generated if not specified. |
| |
| switches: -v : verbose |
| -f : force overwrite of output file |
| -x : putting CRC32 when compressing |
| -0~7 : distortion level. 0=lossless (default), 1~7=lossy |
| -g : use golomb arithmetic coding tree instead of ANS coding (slower)|
| -a : use advanced predictor (extremely slow) |
|----------------------------------------------------------------------------------|Take the images I provided in the ./image/ folder as examples :
Compress a .png file to a .nbli file :
NBLI.exe -vf image\RGB.png -o RGB.nbliCompress a .png file to a .nbli file, use Golomb coding tree (-g) and Advanced predictor (-a) to obtain higher compression ratio :
NBLI.exe -vfga image\RGB.png -o RGB.nbliCompress a .png file to a .nbli file, set distortion level to 1 (lossy!!) :
NBLI.exe -vf1 image\RGB.png -o RGB.nbliDecompress the .nbli file back to a .bmp file :
NBLI.exe -vf RGB.nbli -o RGB.bmp
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