# Fast and Lightweight Rate Control for Onboard Predictive Coding of Hyperspectral Images

## TL;DR

This paper introduces a fast, simple rate control algorithm for onboard hyperspectral image compression, improving speed and ease of implementation while maintaining high compression quality.

## Contribution

A novel rate control algorithm integrated into a lossy extension of CCSDS-123, significantly faster and simpler than previous methods without sacrificing performance.

## Key findings

- Algorithm is over 100 times faster than previous schemes.
- Maintains accurate rate control and image quality.
- Compatible with onboard hyperspectral image compression systems.

## Abstract

Predictive coding is attractive for compression of hyperspecral images onboard of spacecrafts in light of the excellent rate-distortion performance and low complexity of recent schemes. In this letter we propose a rate control algorithm and integrate it in a lossy extension to the CCSDS-123 lossless compression recommendation. The proposed rate algorithm overhauls our previous scheme by being orders of magnitude faster and simpler to implement, while still providing the same accuracy in terms of output rate and comparable or better image quality.