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noise is generally undesirable in photography, and many photographers want to try and reduce it when taking photographs. Noise reduction tends to be about preventing noise in the first place, where as noise removal is a description of post-processing techniques for dealing with noise that is in a ...

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22
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 ...
20
votes
4answers
990 views

What is ETTR (Expose To The Right)?

Picking up from this answer and this question, What exactly is ETTR? How it may reduce the image noise? And how is it difference from film to digital sensors? In the answer linked above, what are the ...
21
votes
8answers
2k views

How can I reduce the noise present when taking pictures without lowering my ISO?

I know that high ISOs tend to produce more noise, and some cameras' software can handle that noise better than others, but are there any other settings or conditions tha affect visible noise? I'm ...
11
votes
5answers
4k views

Does “long exposure noise reduction” option make any difference when shooting RAW?

I can configure my camera (5D) to use long exposure noise reduction (dark frame is exposed and subtracted), but is this method really effective when shooting RAW? Or is the actual subtraction only ...
13
votes
1answer
1k views

Is in-camera high-ISO noise reduction worthwhile?

I shoot in RAW and post-process in Aperture where needed. Does the in-camera noise-reduction do anything that I can't do in Aperture or other post-processing software? It seems to add a bit of time ...
4
votes
2answers
5k views

Which noise reduction software has the best results?

Have you tried different software, compared the results and reached a conclusion? I only used Nikon's DFine and Lightroom's noise reduction tool and found the results very similar. Lightroom's has ...
11
votes
3answers
1k views

Does the order of sharpening and noise reduction matter?

I have been shooting for more than three years, but I never do too much in post-processing. I tend to be strict and keep in mind that PP can only do little to save an otherwise-great photo. I was ...
3
votes
3answers
3k views

Can I merge multiple photos to reduce noise?

This is not about HDR, exposure fusion, or any kind of bracketing (exposure, focus, ISO, what have you). There's an excellent iOS app called Cortex Camera that takes a couple of dozen photos in a ...
3
votes
3answers
1k views

How can you reduce noise in Lightroom 3?

I'm seeing that Lightroom 3 has noise reduction capability, but I'm looking for a good tutorial or other in how to use it practically. Can anyone out there point me to a good tutorial, or provide one ...
4
votes
1answer
947 views

How does in-camera noise reduction compare to software one?

Does programmatically reducing noise reduction the give the same results as hardware post processing in camera, such as on a Nikon D90? What is the best software to do such things (like Photomatix ...
1
vote
3answers
627 views

Does median blending / image stacking result in better or worse results than a long exposure?

For night photography, do long exposures work better or worse than taking a few photos and merging them in software (median blending / image stacking, like the excellent iOS app Cortex Camera)? You ...
22
votes
5answers
857 views

Is there any noise difference between averaged and long exposure photos?

Let's suppose I'm on a tripod, photographing a perfectly still scene (also dark) and I take these photos: 5 photos at ISO 3200 and 1s exposure 1 photo at ISO 100 and 5s exposure There is a common ...
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 ...
13
votes
3answers
4k views

What are the pros/cons of the high-ISO noise reduction feature on D90?

So my D90 offers "High-ISO Noise Reduction". Sounds like a good thing, but obviously there must be a cost of some kind. The settings are "Off", "Low", "Normal", and "High", and the default is ...
7
votes
2answers
3k views

Can I get noise reduction in Aperture that even gets close to the quality of Lightroom's?

I've been looking for a new Library / Photo Editing software, iPhoto isn't really cutting it any more. I've been using both Aperture and Lightroom a bit now (trial licenses) and I noticed a big ...
4
votes
5answers
392 views

Is this amount of noise expected, or am I doing it wrong?

The picture below is a crop (at 1:1 scale) of a photo I just took. It was taken with a Canon 7D and the 24-105mm F4 lens (RAW, F4, ISO 2500, 1/160s). It looks properly exposed to me, so where is all ...
1
vote
1answer
1k views

Should I use in-camera noise reduction, or is it better to leave that for desktop-based post-production? [duplicate]

Possible Duplicate: Is in-camera high-ISO noise reduction worthwhile? Should this be done using image processing software like Photoshop or the built in function of the camera ? It seems a ...