Removes odd-even defects from a one-dimensional NDF
This application is intended for images exhibiting alternating patterns in columns or rows, the so called odd-even noise, arising from electronic interference or readout through different channels. However, you must supply a vector collapsed along the unaffected axis, such that the vector exhibits the pattern. See task COLLAPSE using the Mode or Median estimators. The smoothed image is then subtracted from the supplied vector to yield the odd-even pattern.
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, is given, then there is no limit. [!]
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) value means
using the title of the input NDF. [!]
This routine correctly processes the AXIS, DATA, QUALITY, LABEL, TITLE, UNITS, WCS, and HISTORY components of an NDF data structure and propagates all extensions.
VARIANCE is merely propagated.
Processing of bad pixels and automatic quality masking are supported.
All non-complex numeric data types can be handled. Arithmetic is performed using single- or double-precision floating point as appropriate.