| Stable release: | unreleased |
|---|---|
| Status: | draft |
| Maintainer: | https://github.com/henkmuller |
| Description: | DCT, FFT, and other transforms |
DCT Functionality:
- Basic quantising DCT for JPEG compression
- Basic Huffman encoder for JPEG encoder
- Access functions to compress a series of blocks.
- Example app to compress a PBM file into a JPEG file (PBM because that uses little memory to store).
FFT Functionality:
- Forward complex FFT
- Inverse complex FFT
- Forward real FFT
- Inverse real FFT
- Example app that performs forwards and inverse FFT in sequence
- Interface DCT with a camera.
The purpose of this repo is to collect a series of algorithms to perform transforms on data, such as FFT, DCT, etc.
There are three modules in the repo:
- module_dct_jpeg: forward quantising DCT. The process requires patches of 8x8 integer values, and in situ replace this with 8x8 transformed and quantised patches.
- module_huffman_jpeg: Huffman encode for JPEG images (this may have to go in a different repo). The process requires patches of 8x8 integer values, and streams bits out over a (streaming) channel.
- module_fft_simple: complex FFT (size must be a power of 2), and real FFT (two arrays of identical length that must both be a power of 2).
- This repo contains, for testing purposes, code from the JPEG library. This is not covered by LICENSE.TXT but has its own original LICENSE in an accompanying README file.
- xcommon [email protected]:xcore/xcommon.git
None at present