Module ccsds123 

CCSDS 123.0-B-2 Low-Complexity Lossless Multispectral & Hyperspectral Image Compression. CCSDS 123.0-B-2 Low-Complexity Lossless and Near-Lossless Multispectral and Hyperspectral Image Compression.

Implements the predictor and sample-adaptive entropy coder for 3D image data (NX x NY x NZ). Supports lossless compression with full or reduced prediction mode, wide/narrow neighbor-oriented or column-oriented local sums, and default weight initialization.

Limitations

• Sample-adaptive entropy coder only (no hybrid/block-adaptive)
• BSQ encoding order only
• Lossless mode only (no near-lossless quantization)
• Default weight initialization only (no custom)
• No supplementary information tables
• Dynamic range D limited to 2..=16
• P (prediction bands) limited to 0..=15
• Image dimensions capped by MAX_DIM

Structs

Config

Compressor configuration.

Enums

Error

Compression/decompression error.

LocalSumType

Local sum type.

PredictionMode

Prediction mode.

Functions

compress

Compress a 3D image using CCSDS 123.0-B-2.

decompress

Decompress a CCSDS 123.0-B-2 compressed image.

scratch_len

Compute the required scratch buffer size (in i64 elements) for a given image configuration.