Projects

Overview
Project Title	Low-Complexity Lossless & Near-lossless Multispectral & Hyperspectral Image Compression, issue 3
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-2 (Lossless Multispectral & Hyperspectral Image Compression) to include more regional compression and more flexiability to compression. A consequence of this addition is a change in the book title for Issue 3. 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	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	NASA
Book Editor Resources	5mm
Prototype 1	NASA
Prototype 1 Resources	2mm
Prototype 2	NASA
Prototype 2 Resources	2mm
Prototype 3	CNES
Prototype 3 Resources	2mm
Contribute	CNES, ESA, 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	5/31/2023	6/26/2023	6/26/2023	CMC-P-2023-06-002 New 5.03 Data Compression Working Group Project
Project Start Date	5/31/2023	6/27/2023	6/27/2023
Internal WG Review
First Draft Circulated to WG	10/1/2023	11/6/2023	11/6/2023
First Draft Comments Due	11/1/2023	12/1/2023	12/1/2023
Second draft circulated to WG	3/1/2024	10/1/2024
Second Draft Comments Due	4/1/2024	11/1/2024
Final WB Submitted to AD for Further Processing	11/1/2024	4/1/2025
External Milestones
Secretariat Document Processing	1/1/2025	6/1/2025
First Agency Review	3/1/2025	7/1/2025
RID Resolution	4/1/2025	9/1/2025
Secretariat Document Processing 2	5/1/2025	11/1/2025
Final Agency Review	6/1/2025	12/1/2025
RID Resolution	8/1/2025	2/1/2026
First Prototype Development	5/1/2024	12/1/2024
Second Prototype Development	5/1/2024	12/1/2024
CMC Approval	8/1/2025	5/1/2026
Total Time to Complete (in months)	26	34