sets a new pixel origin
value for an NDF
data structure. The NDF is accessed in
update mode and the indices of the first pixel (the NDF’s lower pixel-index bounds) are
set to specified integer values, which may be positive or negative. No other properties
of the NDF are altered. If required, a template NDF may be supplied and the
new origin values will be derived from it.
setorigin ndf origin
LIKE = NDF (Read)
This parameter may be used to supply an NDF
which is to be used as a template. If such a template is supplied, then its
origin (its lower pixel-index bounds) will be used as the new origin value
for the NDF supplied via the NDF parameter. By default, no template will be
used and the new origin will be specified via the ORIGIN parameter.
= NDF (Read and Write)
The NDF data structure whose pixel origin is to be
ORIGIN() = _INTEGER (Read)
A one-dimensional array specifying the new
pixel origin values, one for each NDF dimension.
image_2d [1,1] Sets the indices of the first pixel in the two-dimensional
image image_2d to be (1, 1). The image pixel values are unaltered.
ndf=starfield A new pixel origin is set for the NDF structure called starfield.
SETORIGIN will prompt for the new origin values, supplying the existing values as
setorigin ndf=cube origin=[-128,-128] Sets the pixel origin values
for the first two dimensions of the three-dimensional NDF called cube to be
A value for the third dimension is not specified, so the origin of this dimension will
setorigin betapic like=alphapic Sets the pixel origin of the NDF
called betapic to be equal to that of the NDF called alphapic.
number of new pixel origin values is fewer than the number of NDF dimensions, then the
pixel origin of the extra dimensions will remain unchanged. If the number of values
exceeds the number of NDF dimensions, then the excess values will be ignored.
Setting a new pixel origin is a quick operation whose timing does
not depend on the size of the NDF.