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A MATLAB implementation of JPEG 2000 Part 1 and Part 15 (HTJ2K) that complies with the conformance testing defined in JPEG 2000 Part 4. The goal of MatHTJ2K is to help a person who wants to develop an HTJ2K-based image compression system to understand the algorithms defined in HTJ2K.

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MatHTJ2K

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.

Description

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.

Prerequisites

  • 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.

Install

Type the following command in the command window:

addpath(genpath('source'))

If you want to save path settings for future session, use savepath command.

Usage

MEX functions (optional)

To generate MEX functions, type generate_MEX_files in the command window.

Encoding

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.

available options to encoder

please see help (type help encode_HTJ2K in the command window)

Decoding

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.

Author

  • Osamu Watanabe

Citation

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

License

The copyright in this software is being made available under the License, included below. This software may be subject to other third party and contributor rights, including patent rights, and no such rights are granted under this license.

Copyright (c) 2018-2020, Osamu Watanabe All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  • Redistributions of source code must retain the above copyright notice,this list of conditions and the following disclaimer.
  • Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
  • Neither the name of ISO nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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A MATLAB implementation of JPEG 2000 Part 1 and Part 15 (HTJ2K) that complies with the conformance testing defined in JPEG 2000 Part 4. The goal of MatHTJ2K is to help a person who wants to develop an HTJ2K-based image compression system to understand the algorithms defined in HTJ2K.

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