Editing Adaptive coding (section)

== Examples ==
Adaptive image coding was used by the [[Cassini-Huygens]] craft to relay images from [[Saturn]]. Only about 5% of the images show any visual signs of damage. As the spacecraft has an error correcting [[Solid-state drive|Flash drive]] and long timeframes between image taking events, damaged images like this can be present. It is assumed that the number of damaged, but unrecoverable images from the Cassini mission is about 0.01% or less.{{Update inline|date=December 2019|reason=How many of the images were actually damaged, now that the mission has ended?}}

[[Image:Damaged N00153918.jpg|thumb|center|450px|The Cassini camera was pointing toward [[Dione (moon)|Dione]] at a distance of approximately 548,210 kilometers. The image was taken using the CL1 and CL2 filters on May 17, 2010.|alt=]]

=== Cassini Lossless Compression ===
* Both converted (8-bit) and unconverted (12-bit) data can be losslessly compressed. The Cassini hardware data compressor uses a modified Huffman encoding scheme as part of its adaptive compressor.
* Each compressed image can be reconstructed on the ground with no loss to the information content of the image, provided the image entropy does not exceed the threshold where 2:1 compression is reached.
* Due to camera problems and the need to reduce file size, there is a slight modification to the image coding scheme so that each compressed line is effectively bandwidth limited on the number of bits available to encode it.