Discussion List Archives

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

(Data Compression)


---------------------------
REQUEST FOR HELP AND ADVICE
---------------------------

Hello Everyone,

   This e-mail is somewhat disconnected to the normal imageNCIF mail,
but I think that it is going to many of the right people.

I have a trainee working at the ESRF for 1 year on the subject of data 
compression for scientific image data. My idea is to get her to
investigate and quantify different loss-less compression algorithms in
terms of compression ratios, cpu time, total time. The algorithms would
be tested on a variety of types of scientific data e.g. PX, SAXS, powder
diffraction, tomography, topography, surface science etc. Probably as 
importantly they would be tested on a number of different types of
detector.

The initial aim would be write a report which could be used to help
choose most appropriate alogrithms for different scientific areas, and
different demands e.g. high speed requirements, or maximum data compression
requirements. Hopefully this would take around 6 months.

This does not necessarily have a direct bearing on CBF, but one of the
algorithms would be the "byte offsets" algorithm which I have presently 
suggested for CBF, and maybe other "successful" algorithms could be 
incorporated into future CBF compression choices.

I'm asking if any of you can help with contributions of algorithms to
quantify, or are otherwise interested in collaborating ? Details of
sources of algorithms would be useful (aftp sites, www pages, etc.).
Similarly, references or details of previous work in this area would be
helpful.

I look forward to hearing from you.

Best Regards,

           Andy

Reply to: [list | sender only]
International Union of Crystallography

Scientific Union Member of the International Science Council (admitted 1947). Member of CODATA, the ISC Committee on Data. Partner with UNESCO, the United Nations Educational, Scientific and Cultural Organization in the International Year of Crystallography 2014.

International Science Council Scientific Freedom Policy

The IUCr observes the basic policy of non-discrimination and affirms the right and freedom of scientists to associate in international scientific activity without regard to such factors as ethnic origin, religion, citizenship, language, political stance, gender, sex or age, in accordance with the Statutes of the International Council for Science.

Useful links