[fitsbits] Adding fpzip floating point compression {External}

[Dubois-Felsmann, Gregory P.]

Hi, Peter,

As Rob has also noted, we're so far assuming that Paul is suggesting extending the set of algorithms already supported by FITS.

Have a look at section 10.4 (p. 50) in the FITS 4.00 document
https://fits.gsfc.nasa.gov/standard40/fits_standard40aa-le.pdf
for the currently standardized list.

Gregory


________________________________________
From: fitsbits <fitsbits-bounces at listmgr.nrao.edu> on behalf of peter teuben via fitsbits <fitsbits at listmgr.nrao.edu>
Sent: Monday, October 27, 2025 08:25
To: fitsbits at listmgr.nrao.edu
Cc: peter teuben
Subject: Re: [fitsbits] Adding fpzip floating point compression {External}

I'm not quite understanding how this would be implemented. Is this a new BITPIX ?   Or does it only apply to a new extension. like how BINTABLE was done?

I get worried if we encode (compression) algorithms in order to decode FITS files.

 - peter

On 10/27/25 11:13, Barrett, Paul via fitsbits wrote:
I would like to suggest that FITS add the fpzip<https://computing.llnl.gov/projects/fpzip> floating point compression algorithm to the FITS standard. fpzip is primarily designed for lossless compression but also has a provision for lossy compression.

I will be adding it to FITSFiles.jl, a pure Julia implementation of the FITS standard.

 -- Paul


--
Paul Barrett, PhD
Department of Physics
The George Washington University
Washington, DC 20052




_______________________________________________
fitsbits mailing list
fitsbits at listmgr.nrao.edu<mailto:fitsbits at listmgr.nrao.edu>
https://listmgr.nrao.edu/mailman/listinfo/fitsbits