(IUCr) CIF Definition save__diffrn_data_frame.center_units

DRAFT DICTIONARY CBF/imgCIF Extensions Dictionary | Draft version 1.5 for comment

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Index

##### Image dictionary (imgCIF) version 1.5.4

# _diffrn_data_frame.center_units

Name:
`'_diffrn_data_frame.center_units'`

Definition:

           The value of _diffrn_data_frame.center_units
                  specifies the units in which the values of
                  '_diffrn_data_frame.center_fast' and
                  '_diffrn_data_frame.center_slow'
                  are presented.  The default is 'mm' for millimetres.  The
                  alternatives are 'pixels' and 'bins'.  In all cases the
                  center distances are measured from the center of the
                  first pixel, i.e. in a 2x2 binning, the measuring origin
                  is offset from the centers of the bins by one half pixel
                  towards the first pixel.

                  If 'bins' is specified, the data in
                      '_array_intensities.pixel_fast_bin_size',
                      '_array_intensities.pixel_slow_bin_size', and
                      '_array_intensities.pixel_binning_method'
                  is used to define the binning scheme.

Type: code

Mandatory item: no

The data value must be one of the following:

`mm` | millimetres

`pixels` | detector pixels

`bins` | detector bins

Category: diffrn_data_frame

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Copyright © 2005 International Union of Crystallography