Photography Stack Exchange
Photography Stack Exchange

Questions tagged [noise]

Image perturbation caused by electronic transformation and processing.

To learn what can cause noise, see "What types of noise can be present in digital photographs?"

221 questions
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7 answers

Cause of grainy photos?

Whenever I view my 12MP photos on my computer at 100% zoom (they're roughly 4200x2400), there always seems to be a lot of grain and noise to the image quality. What, specifically, causes this and what can be done to fix it? Equipment: Nikon…
qJake
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2 answers

What is the source of this multicolored noise in these samples?

I shot many long exposure photos (from 5 minutes to 30 minutes) back in December of 2010 with a two month-old Nikon D7000 and Tokina 11-16mm f/2.8 lens. The photos I took had very little noise. I used the same camera and lens last night (5 months…
bperdue
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5
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5 answers

Why does my ISO 1600 picture have a grainy background?

My camera is a Sony a6000. The picture is taken at f6.3, 1/1000, ISO 1600, 210mm. Why is it grainy in the background and how do I fix it?
akho
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4
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6 answers

Do different lenses affect noise level?

I unfortunately got a very poor and cheap 18-55mm lens on my Canon 60D. In addition to poor quality of my photos (poor in comparison with my 50mm f/1.8 Lens which makes great pictures) the noise level of my pictures is really high. Should I upgrade…
SERAJ
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2
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2 answers

Maximize noise?

Usually when I take photos I try to minimize the noise levels in the image. However, what if I want to maximize the noise or generate an image of pure static, like the snow on a TV screen? Is there a way to do that?
Clickety Ricket
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2
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1 answer

How exactly do I use RawDigger to evaluate signal-to-noise?

I have a trial copy of RawDigger installed, and I understand that for my purposes I should shoot the same subject at different apertures to see if the SNR decreases at faster settings. But how exactly do I read the screen in RawDigger to evaluate…
user382459
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4 answers

How do I reduce the noise in this image / prevent noise in future images?

I'm Canon Powershot A510. I took photography as an elective, and I normally look for pictures later in the evening, as I find it more enjoyable to walk then. The problem is that - especially considering it's winter here - that it gets dark pretty…
mowwwalker
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2 answers

noise in the intensity values has standard deviation of 2 gray levels -- what does that mean?

I am working on digital image correlation and want to figure out the noise in my data. In a book, I read "many digital cameras record intensity values using 8 bits with Gaussian noise in the intensity values having a standard deviation of 2 gray…
Simon
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2 answers

Cold camera, less noise?

In electronics, one of the most significant sources of noise is heat, usually in the form of infrared radiation. Everything gives off infrared radiation, and the hotter something is, the more radiation it produces. This radiation is undoubtedly one…
Clickety Ricket
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