NGC 4565 The Needle LRGB Color Correction and AI Experiments (Jerry Yesavage)

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: IC 3546 · IC 3571 · IC 3582 · NGC 4562 · NGC 4565 · Needle Galaxy

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NGC 4565 The Needle LRGB Color Correction and AI Experiments

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NGC 4565 The Needle LRGB Color Correction and AI Experiments

First image is photometrically corrected TIFF and second JPG. Third is JPG not corrected.

Notice histogram is substantially higher in the last (uncorrected) image.... very clear in PixInsight. Particularly the red and then green to a lesser extent drop. The blue also goes down.

In this histogram cannot see the lower red and green since they are "under" the larger blue, but the height of the uncorrected blue is higher. In PI the histograms of all 3 colors are the same.

Topaz AI was used twice, first on the L and RGB separately and second again on the combined LRGB, which picked up noise in the addition process.

Original
B
C
Final
F

B

Description: Photometrically corrected JPG

Uploaded: ...

C

Description: Uncorrected jpg

Uploaded: ...

F

Description: L added to un-photometrically corrected RGB, saturated and AI applied a second time.

Uploaded: ...

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Light Polluted skies

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	4439720
PixInsight job	AK05T8KX70R64NU5C0JQBPK43ECVOQMJ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h36m21s.176
RA (top/left)	12h35m07s.427
RA (top/right)	12h37m38s.513
RA (bottom/right)	12h37m35s.270
RA (bottom/left)	12h35m03s.532

Dec (center)	+25°59′11″.69
Dec (top/left)	+25°43′49″.97
Dec (top/right)	+25°44′45″.86
Dec (bottom/right)	+26°14′30″.79
Dec (bottom/left)	+26°13′35″.31

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NGC 4565 The Needle LRGB Color Correction and AI Experiments

NGC 4565 The Needle LRGB Color Correction and AI Experiments

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Image Index:

Contribution Index (beta):

NGC 4565 The Needle LRGB Color Correction and AI Experiments

NGC 4565 The Needle LRGB Color Correction and AI Experiments

Equipment

Acquisition details

Description

Comments

Revisions

B

C

F

Sky plot

Histogram

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