Crystallography Online: the website of the International Union of Crystallography

I am aware of at least one vendor considering non-integral
binning.

Ward


Herbert J. Bernstein wrote:
> Dear Chris,
> 
>   I'll add 'none' to the enumeration.
> 
>   To the list as a whole -- does anyone object to keeping the
> option of non-integral rebinning available?
> 
> Here is the updated spec:
> 
> _array_intensities.pixel_fast_bin_size
>      (1, 2, ...)
> _array_intensities.pixel_slow_bin_size
>      (1, 2, ...)
> _array_intensities.pixel_binning_method
>      (hardware, software, combined, none, unspecified)
> 
> The revised proposed formal definitions is appended after your
> message.  The explanations have been clarified.  Note that
> it would be appropriate to specify
> 
>   _array_intensities.pixel_binning_method none
> 
> and not to specify _array_intensities.pixel_fast_bin_size and
> _array_intensities.pixel_slow_bin_size, since they both default
> to 1.
> 
> 
>   Regards,
> 
>     Herbert
> 
> At 2:22 PM -0400 6/20/06, Herbert J. Bernstein wrote:
> 
>> Return-path: <imgcif-l-bounces at iucr.org>
>> Subject: RE: [Imgcif-l] three new suggested tags for binning
>> Date: Tue, 20 Jun 2006 11:10:58 -0700
>> From: "Chris Nielsen" <cn at adsc-xray.com>
>> To: "The Crystallographic Binary File and its imgCIF application to 
>> image  data" <imgcif-l at iucr.org>
>> Reply-To: The Crystallographic Binary File and its imgCIF application 
>> to image data <imgcif-l at iucr.org>
>>
>>
>>       Hi Herbert,
>>
>>       I'm not sure if there will ever be non-integral binning, but
>> it does not hurt to make the definition general.  I would expect
>> binning to be 1, 2, 4 & 8, and almost always fast=slow.  The Bruker
>> small molecule detectors use binning 2, 4, and 8, and some mar
>> detectors use 2 and 4.
>>
>>       Could we add "none" as the method for unbinned images?  Kinda
>> looks neater.
>>
>>       Best,
>>
>>       Chris
>>
> 
> 
> save__array_intensities.pixel_fast_bin_size
>     _item_description.description
> ;
>    The value of '_array_intensities.pixel_fast_bin_size' specifies the
>    number of pixels that compose one element in the direction of the
>    most rapidly varying array dimension.
> 
>    Typical values are 1, 2, 4 or 8.  When there is 1 pixel per array
>    element in both directions, the value given for
>    '_array_intensities.pixel_binning_method' normally should be
>    'none'.
> 
>    It is specified as a float to allow for the possibility use of
>    binning algorithms that create array elements that are not integer
>    multiples of the detector pixel size.
> 
> ;
>     _item.name              '_array_intensities.pixel_fast_bin_size'
>     _item.category_id          array_intensities
>     _item.mandatory_code       implicit
>     _item_type.code            float
>     _item_default.value        1.
>      loop_
>     _item_range.maximum
>     _item_range.minimum
>                             .   0.0
>     _item_units.code           'pixels_per_element'
>      loop_
>     save_
> 
> save__array_intensities.pixel_slow_bin_size
>     _item_description.description
> ;
>    The value of '_array_intensities.pixel_slow_bin_size' specifies the
>    number of pixels that compose one element in the direction of the
>    second most rapidly varying array dimension.
> 
>    Typical values are 1, 2, 4 or 8.  When there is 1 pixel per array
>    element in both directions, the value given for
>    '_array_intensities.pixel_binning_method' normally should be
>    'none'.
> 
>    It is specified as a float to allow for the possibility use of
>    binning algorithms that create array elements that are not integer
>    multiples of the detector pixel size.
> 
> ;
>     _item.name              '_array_intensities.pixel_slow_bin_size'
>     _item.category_id          array_intensities
>     _item.mandatory_code       implicit
>     _item_type.code            float
>     _item_default.value        1.
>      loop_
>     _item_range.maximum
>     _item_range.minimum
>                             .   0.0
>     _item_units.code           'pixels_per_element'
>      loop_
>     save_
> 
> save__array_intensities.pixel_binning_method
>     _item_description.description
> ;
>   The value of '_array_intensities.pixel_binning_method' specifies the
>   method used to derive array elements from multiple pixels.
> ;
>     _item.name              '_array_intensities.pixel_slow_bin_size'
>     _item.category_id          array_intensities
>     _item.mandatory_code       implicit
>     _item_type.code            code
>      loop_
>     _item_enumeration.value
>     _item_enumeration.detail
>                                'hardware'
> ;
>   The element intensities were derived from the raw data of one or more 
> pixels
>   by used of hardware in the detector, e.g. by used of shift registers 
> in a CCD
>   to combine pixels into super-pixels.
> ;
>                                'software'
> ;
>   The element intensities were derived from the raw data of more than 
> one pixel
>   by use of software.
> ;
>                                'combined'
> ;
>   The element intensities were derived from the raw data of more than 
> one pixel
>   by use of both hardware and software, as when hardware binning is used in
>   one direction and software in the other.
> ;
>                                'none'
> ;
>   In the both directions, the data has not been binned.  The number of 
> pixels
>   is equal to the number of elements.
> 
>   When the value of '_array_intensities.pixel_binning_method' is 'none'
>   the values of '_array_intensities.pixel_fast_bin_size' and
>   '_array_intensities.pixel_slow_bin_size' both must be 1.
> 
> ;
>                                'unspecified'
> ;
>   The method used to derive element intensities is not specified.
> ;
> 
> 
>     _item_default.value        'unspecified'
>     save_
> 
> 

-- 
Ward W. Smith, Ph.D.
GM/CA Collaborative Access Team
Advanced Photon Source
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Argonne National Laboratory
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E-mail: wwsmith at anl.gov
http://www.gmca.aps.anl.gov