Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [noise-removal]

some level of digital noise can be inevitable when taking photographs in certain situations, causing photographers to want to remove it in post-processing.

0
votes
0answers
26 views

How does Camera Raw's Luminance and Colour de-noising work?

As I understand it, colour de-noising works by reducing the contrast and saturation of the noise. Essentially converting it to Luminance noise. And Luminance de-noising works by blurring the noise ...
4
votes
3answers
188 views

Where does this noise come from and how to get rid of it

I am using Darktable as my RAW processing software. In darker pictures that have been taken with an ISO of 800 or more, I frequently encounter great issues with luminance noise. The following two ...
1
vote
0answers
152 views

How can I best post-process underexposed, noisy images taken at 5000 iso?

I'm editing photos but the photographer was quite new and he took photos using Olympus OMD EM5II at 1/400, ISO 5000 and at f3.5 resulting in a underexposed noisy image. (The photos are raw.) I tried ...
3
votes
1answer
319 views

Coolpix P900 artifacts

Although I declare myself very satisfied with my Nikon Coolpix P900, I've had in my recent trip in South America numerous pictures blurred by a random artifact, and I would like to know how to avoid ...
3
votes
1answer
1k views

Are there Lightroom plugins for noise reduction which work on RAW data?

I'm wondering if there's any plugin or 3rd party software for Lightroom which lets me reduce noise on RAW image data directly? I'm currently using Define2 from Nik Collection for Lightroom but it ...
0
votes
2answers
625 views

The best setting for Canon 70D for my application

I'm an robotics engineer and do not have any experience in photography. For a project, I need to take some pictures of some objects and need your experience to set the optimal setting because my ...
0
votes
1answer
228 views

Noise reduction in Adobe Camera Raw

When I open a raw file shot in ISO 1600 in ACR there is very little noise in the photo. But after color adjustments when i save or export as a JPG file there is much more noise visible. How can I ...
2
votes
2answers
74 views

Noise & Blue Speck in A Priority Nikon D5200

So, I took this shot indoors (bright sunny outside) using on a Nikon D5200 with A priority and Auto ISO: Photo looks ok when zoomed out. But when I zoom 1:1 in LightRoom, I see some blue specks in ...
1
vote
2answers
1k views

How to remove texture from old scanned photos?

I have a picture here I need to remove the texture. I try the FFT method but I don't get the diamonds to black out when I do it, its sorta flat. whats the best way to get rid of this?
8
votes
3answers
15k 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 ...
7
votes
2answers
1k views

Should I use a single denoising method with aggressive settings, or combine different methods?

I shot some pictures at night, at ISO 3200, and they are of course extremely noisy. But I want to keep them, and make them as decently looking as I can. I use Darktable as a workflow software, and ...
3
votes
1answer
2k views

What's the professional approach to removing noise from a cell phone pic?

I have a cell phone photo that's a bit grainy and slightly blurry. It's not the out-of-focus type of blur, but the blur brought on when edges run together due to lack of sharpness. I have Adobe ...
5
votes
5answers
947 views

What algorithms or example tools are there for denoising of images in Raw format?

I am trying to perform some post-processing of Camera Raw images captrued using my Canon EOS 450-D. I am using PS CS5 and GIMP particulary to remove noise which is present in images. My questions is: ...
30
votes
2answers
4k 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 ...
18
votes
3answers
2k views

Are there any good open source noise removal tools?

In particular that run natively on Linux.
15
votes
11answers
1k views

What noise removal tools work best, and why?

Can anyone recommend some good noise removal tools, free and commercial? Should support RAW and JPEG. Are certain tools better than others in particular situations? Do some integrate better with other ...