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1
vote
3answers
118 views

Too much “Grain” in photos [duplicate]

i'm trying to produce a few mockup pictures of a person using a tablet around the house. These are the conditions: Camera Nikon D90, Lens 18-55 The pictures were taken in the morning Indoors but the ...
16
votes
5answers
1k views

Might future advances in sensor technology reduce or eliminate noise?

Is there a possibility that future tech advances may reduce or eliminate the noise when using high ISO setting, or is this noise unavoidable and inherent to all digital sensors? If there is a ...
-2
votes
5answers
260 views

What's a good software to combine all the frames in a video into a photo?

The goal is to reduce noise. This is on my iPhone 5s, which has bad low-light performance, as you can imagine. So I wanted to see if I could take a video (without the phone moving), and then merge ...
2
votes
2answers
118 views

Which is the factor that creates noise in a photo? [duplicate]

Possible Duplicate: What is noise in a digital photograph? This happens while talking photos on dark or night. The Black color is not black, it has some noise. What would be the reason for ...
3
votes
7answers
2k views

Is noise related to shutter speed as well as ISO?

I understand that as I increase ISO, I'll increase the amount of noise in the resulting image. With a constant aperture I can decrease ISO and slow the shutter speed (assume a non-moving subject, ...
9
votes
4answers
3k views

Astrophotography picture with too much noise. How do I correct this in postprocessing?

This is the Milky Way above Kakadu National Park, Australia, and my first try at astrophotography. Thirty second exposure, f/4.0 at 17mm with ISO 12800 (!!) which in hindsight probably was way too ...
9
votes
3answers
973 views

How does averaging images or lowering resolution reduce noise?

This answer lists 3 techniques to reduce noise: Keep the camera's sensor cool. Take a burst of photos, then average them. Lower the resolution. Can someone shed more light about the last two ...
2
votes
3answers
2k views

Noise Issue / Canon 5D Mark II

Just curious if anyone can help with this? I am using a Canon 5D Mark II and it seams to be having noise issues at ISO 250 and up and especially at ISO 400? What is going on? In low light when my ...
4
votes
4answers
723 views

Is higher ISO noise evenly distributed, or does it affect colors differently?

It's obvious that higher ISO affects the photograph by adding noise or grains. But will that grain or noise be distributed equally over all parts of the photograph, or will it specifically affect ...
7
votes
4answers
1k views

Does noise in images depend upon “Megapixels” or “ISO”?

I have a question about image quality. Does noise in an image is depends upon "Megapixels" or on "ISO"?
21
votes
2answers
1k views

What is noise in a digital photograph?

What kinds of effects are present in digital images that are referred to as "noise"? What are the different sources of noise? What causes each type of noise? What are the characteristics of the ...
4
votes
1answer
555 views

What do the different noise reduction options in Silkypix mean?

I'm playing around with RAW files in Silkypix that came with my Panasonic camera and I am thoroughly confused by the sliders for the noise reduction and the Silkypix manual isn't of much help (at ...
11
votes
1answer
352 views

What is the statistical distribution of sensor noise?

Sensor noise is a random variation in pixel values, but what kind of random is it? Does it follow a normal distribution, one of the gamma distributions, or something funky like an F distribution? ...
88
votes
4answers
5k views

What is “ISO” on a digital camera?

What is "ISO" in general, and how is the scale defined? How does the ISO scale for film speed differ from ISO sensitivity as used in digital cameras? Is lower ISO always better?