Recycling and Protection

Is there anywhere that explains what the recycling and protection features do? I have searched around but haven't found a simple answer.

Thanks for pointing this! Indeed, these features were only documented in the ISBI 2013 paper.

The FAQ has been expanded with this explanation:
https://code.google.com/p/orthanc/wiki/FAQ#What_are_the_Recycling/Protection/Compression_Features?

S├ębastien-