- ←Prev
- NDF
Routines for Accessing the
Extensible N-Dimensional Data Format - Next→
- TOC ↑
Description:
This function may be used to combine an NDF quality array value with the associated
bad-bits mask value to derive a logical result indicating whether an NDF pixel should be included or
excluded from processing by general-purpose software.
Invocation
RESULT = NDF_QMASK(
QUAL, BADBIT )
Arguments
QUAL = BYTE (Given)
The unsigned byte quality value.
BADBIT = BYTE (Given)
The unsigned byte bad-bits mask value.
Returned Value
NDF_QMASK = LOGICAL
If the function returns a .TRUE. result, then the pixel with quality
value QUAL should be included in processing by general-purpose software. If it returns a
.FALSE. result, then the pixel should be regarded as "bad" and excluded from processing.
Notes:
-
This function is implemented as a Fortran statement function and should be defined in each program
unit from which it is invoked by means of the include file NDF_FUNC. This file should normally be
included immediately after any local variable declarations.
-
The result of this function is computed by forming the bit-wise "AND" between the QUAL and
BADBIT values and testing the result for equality with zero. Its actual implementation is
machine-dependent.
- ←Prev
- NDF
Routines for Accessing the
Extensible N-Dimensional Data Format - Next→
- TOC ↑