MatHTJ2K is an implementation of JPEG 2000 Part 1 and Part 15 as defined in Rec. ITU-T T.800 | ISO/IEC 15444-1 and Rec. ITU-T T.814 | ISO/IEC 15444-15, written in MATLAB language.
High Throughput JPEG 2000 (HTJ2K) is a new part of JPEG 2000 standard. The purpose of MatHTJ2K is to help a person who wants to develop an HTJ2K-based image compression system to understand the algorithms defined in HTJ2K. You can find more detailed information about HTJ2K on https://htj2k.com.
What you can do with MatHTJ2K are:
- to compress an image into a codestream which is compliant with JPEG 2000 Part 1 or Part 15.
- to decompress a codestream which is compliant with JPEG 2000 Part 1 or Part 15 into an image.
- to read/to write .jp2 and .jph file.
- MATLAB 2018b or higher with Image processing toolbox (older version may be fine, but not tested.)
- to use MEX version of block-coder, MATLAB Coder is required.
Type the following command in the command window:
addpath(genpath('source'))
If you want to save path settings for future session, use savepath command.
To generate MEX functions, type generate_MEX_files in the command window.
To compress an image stored in array "IMG", type the following command in the command window:
encode_HTJ2K(filename, IMG, MEXflag)
MEXflag should be true if you want to use MEX version of block-coder.
please see help (type help encode_HTJ2K in the command window)
To decompress a codestream, jp2 or jph, type the following command in the command window:
[output composited_output] = decode_HTJ2K(filename, MEXflag, reduce_NL)
MEXflag should be true if you want to use MEX version of block-coder.
reduce_NL is number of DWT resolution to be reduced from that of the original codestream/file.
For further details, please see help encode_HTJ2K/decode_HTJ2K.
- Osamu Watanabe
Please cite this paper if you use MatHTJ2K for your published work.
- O. Watanabe and D. Taubman, "A Matlab Implementation of the Emerging HTJ2K Standard," 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE), Osaka, Japan, 2019, pp. 491-495, doi: 10.1109/GCCE46687.2019.9015602
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