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