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Photo Acceptance - Post-Screening (GulfstreamGuy)  
User currently offlineGulfstreamGuy From United States of America, joined Jul 1999, 646 posts, RR: 2
Posted (5 years 5 months 3 days 14 hours ago) and read 2101 times:

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

http://www.airliners.net/procphotos/...90327_n1237788874.7496dsc00801.jpg

and..

http://www.airliners.net/procphotos/...90327_f1237788696.7002dsc00799.jpg

Any ideas?

jason
GulfstreamGuy


"If we couldn't laugh, we would all go insane. " -Jimmy Buffett
5 replies: All unread, jump to last
 
User currently offlineOly720man From United Kingdom, joined May 2004, 6703 posts, RR: 11
Reply 1, posted (5 years 5 months 3 days 14 hours ago) and read 2090 times:

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.



wheat and dairy can screw up your brain
User currently offlineCpd From Australia, joined Jun 2008, 4879 posts, RR: 38
Reply 2, posted (5 years 5 months 3 days 14 hours ago) and read 2085 times:



Quoting GulfstreamGuy (Thread starter):
Any ideas?

And before you try to re-edit it, both are over-sharpened, with very obvious jagged edges.


User currently offlineSoon7x7 From , joined Dec 1969, posts, RR:
Reply 3, posted (5 years 5 months 3 days 11 hours ago) and read 2055 times:

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.

User currently offlineJohnJ From United States of America, joined Jun 2000, 1657 posts, RR: 2
Reply 4, posted (5 years 5 months 3 days 9 hours ago) and read 2034 times:

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.

User currently offlineUnattendedBag From United States of America, joined Oct 2003, 2325 posts, RR: 1
Reply 5, posted (5 years 5 months 3 days 7 hours ago) and read 2015 times:



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

what were your camera settings?



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