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(Data Compression)
- To: Multiple recipients of list <imgcif-l@bnl.gov>
- Subject: (Data Compression)
- From: Andy Hammersley <hammersl@esrf.fr>
- Date: Mon, 17 Jun 1996 12:38:05 -0400 (EDT)
--------------------------- 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
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