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Photo Acceptance - Post-Screening (GulfstreamGuy)

Mon Mar 30, 2009 9:47 am

I have all but given up on trying to submit to! Please someone explain to me what "digital noise" is! I was rejected because of this very thing.


Any ideas?

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Photo Acceptance - Post-Screening (GulfstreamGuy)

Mon Mar 30, 2009 10:21 am

It's most obvious in the brighter part of the photo on the left edge, 1st photo, and along the top, 2nd photo. Basically the graininess and it's due to how the CCD sensor reacts to low light levels. Because you need a certain amount of light to "trigger" a pixel, you can end up with a random pattern of noise when there is little light.

You __might__ be able to clean it up a bit with something like neatimage.
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Photo Acceptance - Post-Screening (GulfstreamGuy)

Mon Mar 30, 2009 10:24 am

Quoting GulfstreamGuy (Thread starter):
Any ideas?

And before you try to re-edit it, both are over-sharpened, with very obvious jagged edges.
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Photo Acceptance - Post-Screening (GulfstreamGuy)

Mon Mar 30, 2009 12:33 pm

Next time if your camera has a long exposure noise reduction setting, engage that, as noise seems to occur mostly in the dark fields. It is sometimes , I believe confused with grain...but I'm led to believe that noise is actually gaps in the exposure if you greatly magnify the image...I'm not 100% sure of this but that is what I've been told. I'm sure I'll be corrected on this.
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Photo Acceptance - Post-Screening (GulfstreamGuy)

Mon Mar 30, 2009 3:18 pm

Even for night shots, if you're using a tripod use the lowest ISO setting your camera supports. This will require a longer exposure time, but for stationary subjects like yours with the support of a tripod, this shouldn't be a hindrance and the lower ISO will reduce the grain and noise.
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Photo Acceptance - Post-Screening (GulfstreamGuy)

Mon Mar 30, 2009 4:56 pm

Quoting GulfstreamGuy (Thread starter):
I was rejected because of this very thing.

what were your camera settings?
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