https://github.com/rcanut/nhwcodec

NHW : A Next-Generation Image Compression Codec
https://github.com/rcanut/nhwcodec

codec entropy-coding image-compression image-processing lossy-compression nhw wavelet

Last synced: 3 months ago
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NHW : A Next-Generation Image Compression Codec

• Host: GitHub
• URL: https://github.com/rcanut/nhwcodec
• Owner: rcanut
• License: other
• Created: 2012-12-01T12:04:58.000Z (about 12 years ago)
• Default Branch: master
• Last Pushed: 2024-10-24T16:14:38.000Z (4 months ago)
• Last Synced: 2024-10-25T22:20:21.406Z (3 months ago)
• Topics: codec, entropy-coding, image-compression, image-processing, lossy-compression, nhw, wavelet
• Language: C
• Homepage:
• Size: 426 KB
• Stars: 68
• Watchers: 9
• Forks: 9
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: license.txt
  • Authors: AUTHORS

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README

        
NHW Image Codec

============

A Next-Generation Free Open-Source Image Compression Codec

The NHW codec is an experimental codec that compresses for now 512x512 bitmap 24bit color images using notably a wavelet transform.

The NHW codec presents some innovations and a unique approach: more image neatness/sharpness, and aims to be competitive with current codecs like for example x265 (HEVC), Google WebP,...

Another advantage of the NHW codec is that it has a high speed, making it suitable for mobile, embedded devices.

How to compile?

============

1) With mingw/gcc

`$ cd decoder && gcc *.c -O3 -o nhw-dec`

`$ cd encoder && gcc *.c -O3 -o nhw-enc`

2) With CMake

`$ mkdir build && cd build && cmake ../ && make`

To encode an image (512x512 bitmap color image for now):

encoder options: quality settings: -q[1..23] {default: 20}

example:

`$ nhw-enc image.bmp image.nhw`

`$ nhw-enc -q10 image.bmp image.nhw`

To decode:

`$ nhw-dec image.nhw image.bmp`