Re: [ccp4bb] image compression

- Protein crystallography

Main steps:

- Protein purification
- Crystallisation

Special:

- Programs for crystallography
- X-ray detectors

Basic tutorials:

   - Chemistry
   - Protein
   - Peptide
   - Amino Acids

Xtal community:

- CCP4BB

CCP4bb navigation

CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Re: Archiving Images for PDB Depositions
From: "Deacon, Ashley M {- dot -} " adeacon {- at -} SLAC {- dot -} STANFORD {- dot -} EDU
Date: 2011-11-08

Next message:
Subject: Re: image compression
From: mjvdwoerd {- at -} NETSCAPE {- dot -} NET mjvdwoerd {- at -} NETSCAPE {- dot -} NET
Date: 2011-11-08

Subject: Re: image compression
From: Miguel Ortiz Lombardia miguel {- dot -} ortiz-lombardia {- at -} AFMB {- dot -} UNIV-MRS {- dot -} FR
Date: 2011-11-08

Le 08/11/2011 19:19, James Holton a écrit :
> At the risk of putting this thread back on-topic, my original question
> was not "should I just lossfully compress my images and throw away the
> originals". My question was:
>
> "would you download the compressed images first?"
>
> So far, noone has really answered it.
>
> I think it is obvious that of course we would RATHER have the original
> data, but if access to the original data is "slow" (by a factor of 30 at
> best) then can the "mp3 version" of diffraction data play a useful role
> in YOUR work?
>
> Taking Graeme's request from a different thread as an example, he would
> like to see stuff in P21 with a 90 degree beta angle. There are
> currently ~609 examples of this in the PDB. So, I ask again: "which one
> would you download first?". 1aip? (It is first alphabetically). Then
> again, if you just email the corresponding authors of all 609 papers,
> the response rate alone might whittle the number of datasets to deal
> with down to less than 10. Perhaps even less than 1.
>
> -James Holton
> MAD Scientist
>

Hmm, I thought I had been clear. I will try to be more direct:

Given the option, I would *only* download the original,
non-lossy-compressed data. At the expense of time, yes. I don't think
Graeme's example is very representative of our work, sorry.

As long as the option between the two is warranted, I don't care. I just
don't see the point for the very same reasons Kay has very clearly exposed.

Best regards,

--
Miguel

Architecture et Fonction des Macromolécules Biologiques (UMR6098)
CNRS, Universités d'Aix-Marseille I & II
Case 932, 163 Avenue de Luminy, 13288 Marseille cedex 9, France
Tel: +33(0) 491 82 55 93
Fax: +33(0) 491 26 67 20
mailto:miguel.ortiz-lombardia@afmb.univ-mrs.fr
http://www.afmb.univ-mrs.fr/Miguel-Ortiz-Lombardia

CCP4bb navigation

CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Re: Archiving Images for PDB Depositions
From: "Deacon, Ashley M {- dot -} " adeacon {- at -} SLAC {- dot -} STANFORD {- dot -} EDU
Date: 2011-11-08

Next message:
Subject: Re: image compression
From: mjvdwoerd {- at -} NETSCAPE {- dot -} NET mjvdwoerd {- at -} NETSCAPE {- dot -} NET
Date: 2011-11-08