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XVOL-FILL-HISTOGRAM

source files: xvol.[ch]

SYNTAX

(XVOL-FILL-HISTOGRAM
      :VOXELS <grl:voxels>
    [ :BIN-SIZE <fix:bin-size> ]
    [ :MIN <fix:min> ]
    [ :MAX <fix:max> ]
    [ :RESULT-IN <grl:point-y> ]
)

DESCRIPTION

VOXELS should be either a rank-three CLASS-16-BIT-FLOAT-ARRAY or else a graphic relation holding such an array, named :DENSITY.

'min', 'max' specify the range of pixel values which should be histogrammed.

If :BIN-SIZE is specified, it is the number of pixel values to lump together into one bin: The default value of 16 results in 256 bins. Currently, the only supported values are 1, 2, 4, 8, 16, 32, 64.

If :RESULT-IN is supplied, point-y should be either a CLASS-FLOAT-ARRAY at least long enough to hold the result values, or else a graphic relation holding such an array, named :POINT-Y. If so, the result values will be placed in the array, and point-y returned. Otherwise, a fresh relation will be allocated and the result returned in it.


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