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RE: [APML] OT: DSS image processed: Barnard 142/143Complex("E" Nebula)
Hi Richard,
no, I'm not "generating" data! If you take a look to the image
with the stars
removed, you will view that there are a lot of gradients that are not
visible
due to the high density of the star field:
http://www.pleiades-astrophoto.com/pixinsight/examples/B142_woStars.jpg
Simply, I'm enhancing that gradients over the stars to make
them visible to
the eye, that's all!
Regards,
Vicent.
At 19:00 13/10/2004 -0500, you wrote:
This is not intended as a criticism, but a
question; the hairs on my neck go
up when the "invisible" is "revealed". Is it
REALLY exposed data or is it
processing artifact?
If it is intended, as suggested by comments that I trimmed off, that
the
resulting images are for "artistic" presentation then I have no
problems.
On the other hand, if the resulting images are for scientific analysis,
have
you revealed information or manufactured data?
-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On
Behalf Of Vicent Peris
Sent: Wednesday, 13 October, 2004 09:24
To: Discussion of Film Astrophotography
Subject: Re: [APML] OT: DSS image processed: Barnard 142/143
Complex("E"
Nebula)
Hi Ray,
I've made two crops of a selected area of the image at full size, before
and
after all of the processing:
http://www.pleiades-astrophoto.com/pixinsight/examples/B142_Crop_Before.jpg
http://www.pleiades-astrophoto.com/pixinsight/examples/B142_Crop_After.jpg
As you can see, there is no data loss. In fact, there is much more
perceptible data in the second image! Star colors are more
differentiated:
you can easily view the redder stars surrounding the dust clouds. On
the
other hand, brightness gradients on the clouds are also more defined, due
to
applied noise suppression and large-scale processing methods. Therefore,
if
you take into account only the *significant* data of the image, you'll
see
that the applied processing has recovered a lot of data which was
invisible
in the initial image. Really, do you think there are more things to see
into
the original?
...
trimmed ...
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Vicent Peris
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