[Imgcif-l] three new suggested tags for binning
Herbert J. Bernstein yaya at bernstein-plus-sons.comMon Jun 19 22:56:40 BST 2006
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At the suggestion of Chris Nielsen, we propose the following three new tags to hold information on the binning of images: _array_intensities.pixel_fast_bin_size (1, 2, ...) _array_intensities.pixel_slow_bin_size (1, 2, ...) _array_intensities.pixel_binning_method (hardware, software, combined, unspecified) In order to allow for software binning involving fractions of pixels, the bin sizes would be floats, not ints. Comments, corrections and suggestions with respect to the appended proposed formal definitions would be appreciated. -- H. J. Bernstein The proposed formal definitions are: 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. It is specified as a float to allow for 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. It is specified as a float to allow for 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 dectector, 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. ; 'unspecified' ; The method used to derive element intensities is not specified ; _item_default.value 'unspecified' save_ -- ===================================================== Herbert J. Bernstein, Professor of Computer Science Dowling College, Kramer Science Center, KSC 121 Idle Hour Blvd, Oakdale, NY, 11769 Office: +1-631-244-3035 Lab (KSC 020): +1-631-244-3451 yaya at dowling.edu =====================================================
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