Hi Lei,
It would be possible to do this specific filter internally
within findclumps, but I'm wondering if some more general approach may
be better, given that there is potentially a large number of different
filters that people may want to use. Either way, it is probably going
to be some time before I could make these changes, so as an
alternative maybe you could filter the clumps after running findclumps
rather than waiting for me to add extra filtering code to findclumps.
One approach would be to use topcat (
http://www.star.bris.ac.uk/~mbt/topcat/ ) or stilts
(http://www.star.bris.ac.uk/~mbt/stilts/) to filter the FITS catalogue
created by findclumps, and if required, use kappa (part of starlink)
to set the corresponding pixel values bad in the mask NDF created by
findclumps.
David
On 15 August 2011 09:55, Lei Qian <[log in to unmask]> wrote:
> Hi,
>
> I just wonder if it is possible to add an additional criterion to the clumps
> to be accepted. Now, as I kown, too small clumps
> with small number of pixels can be omitted. However, for example, is it
> possible to omit the clumps with large axis ratio (say,
> omit clumps with major/minor > 10)?
>
> Thanks a lot!
>
> Best Regards,
> Lei
>
> -----------------------------------------------------
> Lei QIAN
> National Astronomical Observatories
> 20A Datun Road, Chaoyang District
> Beijing 100012, China
> [log in to unmask]
> [log in to unmask]
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