Hi,
I want to propose a small modification to the pgblur script, right after
assigning the command line parameters to variables:
set inp = "$3"
set Lzero = `pextrem $inp:q | tail -1 | rcalc -e
'$1=if((.265*$3+.67*$4+.065*$5)-1e-5,0,1)'`
if ( $Lzero ) then
exec cat $inp:q
exit 0
endif
This outputs the original image if all pixel values are zero (well,
below my arbitrarily chosen threshold) rather than producing an error.
The motivation is that I want to filter frames resulting from CBDM. One
could, of course, keep this test outside the script, but this eliminates
one error condition.
Cheers,
Lars.
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