- ...rotated.
- Even when the
data are sufficiently sampled, the conventional rotation algorithms
implemented in the standard astronomical image processing packages are
generally inadequate, since they are not faithful to the data. An algorithm is
called ``faithful'' here if it preserves the information content
(in particular, the high spatial frequency spectrum) of the data.
Every faithful operator has an inverse operator.
- ...values
- This simple
and efficient heuristic algorithm can be
(and has been) criticized for violating the first principle of data
analysis ``Don't modify the data.'' However, this criticism can be rebutted,
because bad pixels never attain the same status as good ones.