Projects

Overview
Project Title	Low-Complexity Lossless & Near-Lossless Multispectral & Hyperspectral Image Compression, Issue 2
Approval	Approved
Document Number	123.0
Charter	5.03 Data Compression Working Group
Document Type	Blue
Description of Document	This project extends the CCSDS-123.0-B-1 (Lossless Multispectral & Hyperspectral Image Compression) to also provide near-lossless compression. A consequence of this addition is a change in the book title for Issue 2. Such a recommendation targets applications requiring very high-fidelity reconstructed image data and low-complexity (i.e., fast) onboard implementation. Near-lossless compression provides a user-specified guarantee on the maximum error introduced by compression, unlike transform-based methods which work well for applications requiring very high compression ratios.
Applicable Patents	There are no patent issues for this technology that are known by the CCSDS community
Patent Comments	Some algorithm details have yet to be resolved, but presently the WG is unaware of any patent concerns.
Survey of Similar Standards Documents or Projects Undertaken in Other Bodies and elsewhere in CCSDS	* The JPEG-LS recommendation provides low-complexity lossless and near-lossless compression and supports multi-band images. However, the underlying compression method is fundamentally a 2D compressor and fails to exploit significant correlation between spectral bands, thus yielding significantly less effective compression than the proposed Recommendation. * The CCSDS-122.1-B Recommendation under development provides lossless and lossy compression, and effectively exploits correlations between spectral bands. However, this transform-based method is significantly less effective at high bit rates, and does not provide users with a quantifiable guarantee on the maximum reconstruction error of any sample. This transform-based approach also has substantially higher complexity. * There are numerous other 2D image compression approaches that take little or no advantage of correlations in the spectral dimension.
Resources
Book Editor	ESA
Book Editor Resources	8mm
Prototype 1	NASA
Prototype 1 Resources	5mm
Prototype 2	ESA
Prototype 2 Resources	3mm
Prototype 3
Prototype 3 Resources
Contribute	CNES, NASA
Monitor Only
Resource Comments

Schedule

Legend for Schedule Milestones = Required for Orange Books = Required for Green Books = Required for Magenta Books = Required for Blue Books Note - Red Books are Draft Blue/Magenta Books Schedule Milestones	Original Completion Date (Date in M/D/YYYY format.)	Estimated Completion Date (Date in M/D/YYYY format.)	Actual Completion Date (Date in M/D/YYYY format.)	Comments (Date in M/D/YYYY format.)
Project Approved	6/1/2015	6/1/2015	4/10/2015	CMC-P-2015-03-007
Project Start Date	11/10/2015	11/10/2015	11/10/2015
Internal WG Review
First Draft Circulated to WG	3/10/2016	3/10/2016	3/21/2016
First Draft Comments Due	4/10/2016	11/10/2017	11/6/2017
Second draft circulated to WG	10/10/2016	3/16/2018	2/28/2018
Second Draft Comments Due	11/10/2016	4/20/2018	3/19/2018
Final WB Submitted to AD for Further Processing	3/10/2017	6/12/2018	3/23/2018
External Milestones
Secretariat Document Processing	5/10/2017	8/13/2018	6/29/2018	Review started 6/29/2018
First Agency Review	7/10/2017	10/15/2018	9/7/2018	Review closes 9/7/2018
RID Resolution	11/10/2017	12/17/2018	10/17/2018
Secretariat Document Processing 2	12/10/2017	1/17/2019	1/17/2019
Final Agency Review	2/10/2018	3/18/2019	3/18/2019
RID Resolution	4/10/2018	5/20/2019	5/20/2019
First Prototype Development	7/10/2016	3/15/2018	4/1/2018
Second Prototype Development	7/10/2016	3/15/2018	4/1/2018
CMC Approval	5/25/2018	6/28/2019	2/6/2019	CMC-P-2019-01-002 closed 6 Feb 2019
Total Time to Complete (in months)	30	43