IEEE Geoscience and Remote Sensing Magazine - September 2014 - 8

© imagestate

A Tutorial on Image
Compression for Optical
Space Imaging Systems
Abstract-Public policies and private initiatives share
the will to explore outer space and to monitor the Earth
from space sensors. Recent years have seen an increased
number of space missions, while the sensors on board aircrafts or spacecrafts have also significantly improved their
acquisition capabilities. Given this huge volume of remote
sensing data and the detailed characteristics of the acquired
images, a data compression process is in order to allow as
large a transmission rate as possible.
In this paper we provide an overview of several standards for remote sensing data compression, notably of
those recently approved by the Consultative Committee
for Space Data Systems, although the use of other ISO/
IEC image coding standards is also dealt with. Discussion
Digital Object Identifier 10.1109/MGRS.2014.2352465
Date of publication: 17 October 2014

embraces both mono band and multi band compression,
and lossless, lossy and near-lossless compression.
Illustrative results are reported for a set of AVIRIS and
Hyperion images, indicating that exploiting the spectral
correlation-either in prediction-based or in transformbased schemes-is paramount to achieve improved coding
performance.
I. INTRODUCTION
mage compression has been studied for a long time now.
The development of new compression techniques had led
to plenty of image compression standards such as JPEG and
JPEG2000 that are routinely used in many consumer applications. Alongside, the image compression problem has
become increasingly more important for a particular class
of images, namely those acquired by remote satellites with
on-board cameras. Such cameras can be of very different

I

IB and JSS acknowledge partial funding from FEDER, the Spanish Government and the Catalan Government under Grants TIN2012-38102-C03-03 and
2014SGR-691. EM acknowledges partial funding from ESA-ESTEC under grant 107104.

8

2168-6831/14©2014IEEE

ieee Geoscience and remote sensinG maGazine

SEPTEMBER 2014



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