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Re: [Imgcif-l] CBF Format

• To: The Crystallographic Binary File and its imgCIF application to image data <imgcif-l@iucr.org>
• Subject: Re: [Imgcif-l] CBF Format
• From: "Nicholas K. Sauter" <nksauter@lbl.gov>
• Date: Wed, 12 Sep 2007 13:50:01 -0700
• In-Reply-To: <46E8433B.7080908@rayonix.com>
• References: <46E8433B.7080908@rayonix.com>

Justin,

Thanks for working on CBF support for the Mar CCD.  The image processing 
program LABELIT expects full CBF, not miniCBF.  The MIME area is not 
parsed.  You are correct in identifying the "non-optional" data items.  
This is as far as my expertise goes...it would be quite helpful if some 
Mar datasets written in CBF format were to be made available.  The most 
useful test cases would be those where the direct beam is offset from 
the detector center, but not at a 45- or 90-degree position angle.  Full 
datasets would be most useful. 

Nick Sauter

Justin Anderson wrote:

>Hello everyone,
>
>My name is Justin Anderson with Rayonix (formerly MarUSA).  I have been 
>given the task of adding CBF format support to the marccd program.  I 
>was hoping you could help me with a few questions that have arisen.  I 
>truly appreciate it.
>
>Now for the questions...
>
>1)  Are miniCBF files meant to be read by imaging programs such as 
>marccd or are they expected to be converted to full CBF format first?
>
>2)  What is the minimum set of fields that is necessary for an official 
>miniCBF and CBF file?  In the "Simple Example Header" in section 2 of 
>the Draft Format 
>(http://www.iucr.org/iucr-top/cif/cbf/cbf_definition.html) it does 
>mention at one point that "the above" data items are optional.  Does 
>that imply that the items below are required?
>
>3)  Some items can exist in both the header area and the MIME area.  One 
>such example is the image size (e.g. fastest and second-fastest number 
>of pixels).  When reading a CBF file, should I expect to get that 
>information from the MIME, the CBF header area or would it be found in both?
>
>I appreciate any help you can give me.
>
>
>
>Justin Anderson                    Rayonix, LLC (Formerly Mar USA)
>Software Engineer                  justin@rayonix.com
>1880 Oak Ave. Ste. 120             Evanston, IL, USA 60201
>877.627.9729                       847.869.1548
>
>_______________________________________________
>imgcif-l mailing list
>imgcif-l@iucr.org
>http://scripts.iucr.org/mailman/listinfo/imgcif-l
>  
>

-- 
Nicholas K. Sauter, Ph.D.
Lawrence Berkeley National Laboratory
1 Cyclotron Road
Berkeley, CA 94720

nksauter@lbl.gov
Voice: 510-486-5713
Fax: 510-486-5909
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