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Questions tagged [noise]

Image perturbation caused by electronic transformation and processing.

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How does double Native ISO function?

My question are based on two things. SNR can be modeled by the poisson distribution and with increasing illuminance, noise increases (shot noise) but so does the SNR. Cinema camera sensors have a ...
vannira's user avatar
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1 vote
7 answers
533 views

Why could using a low ISO setting be bad?

My question is based on ISO and regarding grain. So when taking a photo with high iso normally you would get grain. To combat this you would normally just simply lower the iso, but I've seen and heard ...
Marcus's user avatar
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At what point is bit depth redundant in photography/cinematography?

When thinking of pixel (physical) resolution, I imagine the pixel count as sampling the spatial variations in luminance across the scene. More pixels, the greater ability to sample the undulating ...
vannira's user avatar
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1 answer
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Benefit of larger photosites

I often read that larger photosites have better SNR performance. However, from further reading and test footage I have seen. It seems that, as many people also rightfully point out, it has more to do ...
vannira's user avatar
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2 answers
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How much noise does Getty Images tolerate for a contributor application?

I captured some decently pleasing pictures (when zoomed out) using Canon M50 + kit lens during the time of sunset. The image, when not zoomed in 100% looks well, but when zoomed in 100%, it looks ...
Redsbefall's user avatar
1 vote
1 answer
137 views

Wrapping my head around the signal to noise ratio

To my knowledge the signal to noise ratio when talking about shot noise, is defined as the mean signal divided by the standard deviation. In the Poisson distribution, which can be used to model shot ...
vannira's user avatar
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1 answer
202 views

Unusable image R5 iso 1000

So since I bought my R5, I cannot have good images in certain conditions. Here is an example. Original image link Iso 1000, F4, 1/200 This picture is unusable. The picture is really noisy for a 1000 ...
Alexis Legault's user avatar
1 vote
3 answers
112 views

Phenomenon where a repeating pattern on a photo is colorized in alternating stripes [duplicate]

What is the name of the phenomenon where a repeating pattern on a photo is colorized in alternating stripes, like this? In addition, does leading software like Photoshop and Lightroom have ...
Ynhockey's user avatar
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1 answer
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Why does a lens profile on Lightroom produce such noise artifacts?

I've recently switched to a new system (Canon R5 + Canon RF 24-70mm f/2.8L) and I'm experiencing some unexpected noise artifacts when I apply lens profile corrections in Lightroom Classic CC (v12.2). ...
Carles Araguz's user avatar
0 votes
2 answers
82 views

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 ...
Simon's user avatar
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4 votes
3 answers
526 views

What is the source of color noise?

Many articles mention color (chroma) noise. However, I cannot find proper information what is the cause of this kind of noise. It looks quite different than the luminance noise, so for this reason I ...
Holiweil's user avatar
1 vote
0 answers
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Why does Google Pixel 6's camera add some artefact when using `.7x`?

Example of artefact using the native camera application with .7x: Camera with 1x shows no such artefact: ...
Franck Dernoncourt's user avatar
1 vote
3 answers
221 views

Low light, indoor gig photography without pumping that ISO?

I've got a Canon EOS4000D and regularly shoot photography for my wife's church. I use a Tamron SP 24-70mm F/2.8 Di VC USD G2 and a Sigma 50-200 f/4-5.6 dc os hsm. The problem I'm having is it's quite ...
Alistair Hardy's user avatar
1 vote
1 answer
108 views

Is there any data or theory about human visual system to identify details under noise?

For one clean image, one person can identify every details at first. Then white Gaussian noise is added to the image. With low noise level, one person can still identify every details even though ...
Jogging Song's user avatar
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4 answers
171 views

Could somebody help me understand this paragraph explaining the relationship between noise and sensor size?

According to this article from dpreview, which compared noise between a full-frame camera with a full-frame lens (the D810), the same full-frame camera with an APS-C lens, and an APS-C camera with the ...
Brian Daniels's user avatar
1 vote
2 answers
161 views

If you double ISO and halve shutter duration, how would it affect SNR?

Assuming the SNR is shot limited. Would it be the square root of 2 because of the shutter speed?
Manny's user avatar
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2 answers
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Do my photos look blurrier on a newer, higher-resolution camera body because my lens has a problem?

I have a Canon EF 100-400 1:4.5-5.6 L IS USM (the old version, not the II) zoom lens, which I often use for bird photography. I used to have a Canon 10D body, which I used in combination with this ...
CesarGon's user avatar
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5 answers
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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's user avatar
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1 answer
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I have an image problem and I don't know what to call this

I wrote the article using a translator and hope you understand well, Sorry... I am developing machine vision using basler camera(acA2440-20gm). A problem arose during development. The image contains ...
Most T's user avatar
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1 vote
0 answers
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Sensor resolution and ISO performance [duplicate]

I keep hearing that less megapixels = better ISO performance, because larger pixels capture more light Suppose I shot something with a 4MP sensor and then downscale it to 1MP (4-to-1 pixel binning?)....
user2797961's user avatar
1 vote
2 answers
702 views

I am shooting video at 200 ISO but the video is still really noisy. Any ideas on how to fix this?

I'm using a Sony Alpha A58 and I am shooting at 25 fps. My settings are ISO 200, F5.6, 1/50. The video is noisy in general but more in the darker areas such as black wall e.t.c. Any ideas? Thanks!
Joseph Riley's user avatar
0 votes
1 answer
503 views

weird vertical lines in low light settings on my Canon 70D

When I record or take photos I get these really weird vertical lines going down my image in the shadows. How to I fix this? I don't have it on a high ISO.
Jonah Tieman's user avatar
1 vote
1 answer
215 views

Photo noise level in RAW format [duplicate]

Why is the noise level of raw photos higher than jpeg photos? I have encountered this issue several times.
Merlin's user avatar
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1 vote
2 answers
125 views

Very noisy image, looks like stars

Yesterday I did some long exposure shots, and it turned out to go quite well (in my opinion), just one issue is that the image is very noisy like I've never seen before. The noise looks like stars, ...
Dadahu's user avatar
  • 57
1 vote
0 answers
119 views

How to remove this noise (color patches)?

I'm having images with a visible color noise taking form of color blocks: One can reveal the patches with modular multiplication (x -> x*d%255, ...
Soleil's user avatar
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1 vote
0 answers
675 views

What is the cause of these colored dots?

I recently bought a used Canon 6D with the 24-105 f/4 L USM kit lens. After shooting some outdoor pictures at night, I noticed some colored pixels or dots in the images, especially at longer exposures ...
ADDelta's user avatar
  • 11
3 votes
2 answers
328 views

Noise reduction, upload to shutterstock declined

would you be able to help please with any feedback on the photo I've taken. I've tried to submit it to the Shutterstock but it was rejected with the following comment: Noise / Film Grain: Content ...
Math_manul's user avatar
1 vote
1 answer
235 views

Digitizing slides with a camera: still too much noise

Third episode of my odyssey to digitize our entire family slides collection. If you want to know all the details of the project, I invite you to check my two other posts but here is a quick recap of ...
Jérôme MEVEL's user avatar
2 votes
3 answers
769 views

autofocus shown in viewfinder and captured on actual pic is different

Equipment : Nikon D7000, Godox Flash on camera with soft box diffuser. Background: I have been assigned the task by my family to make portrait albums of the identical twins born to my close relative. ...
IHaveAQuestion's user avatar
2 votes
1 answer
254 views

why i have black rectangles on my photo?

Original photo Edited photo to better show rectangles sony a6000 iso 100 3.2 f/5 sigma 60 mm (90mm for aps-c)
Tsvi's user avatar
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8 votes
2 answers
3k views

Why is the North America Nebula so hard to see on this astrophoto?

Parameters: Canon EOS 70D, astromodified Canon EF 100–400 mm f/4.5–5.6 L IS Astronomik UHC filter iOptron Pro mount + bar with 1.5 kg counterweight + Slik travel tripod ISO 1000 150 mm f/5 50×13"...
Neppomuk's user avatar
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5 votes
4 answers
2k views

Where are these maze-like noise patterns coming from in this tit photo? [duplicate]

I was just editing some tit photos I made on our balcony, and I found really strange patterns of noise over the bird's feathers: The photo is from Nikon D5600, settings 85mm F4.0 1/1000 ISO 160 These ...
Tomáš Zato's user avatar
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8 votes
1 answer
2k views

What texture is used in this photo?

I want to know what texture is used in this photo. If you zoom in on the lighter parts of the photo, there seems to be some little tiny digital bubbles/circle type things (some type of grain or noise?)...
Em Ed's user avatar
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1 vote
2 answers
269 views

White noise spots on our IP Camera, is it faulty?

Can anyone help us solve what could cause white noise spots on the images from our IP camera? There is only one light source - the window above door. Is the camera faulty? We keep getting ...
Foxhoundn's user avatar
  • 111
0 votes
1 answer
82 views

a6400 Red circle (light / flare) when getting close to darker subject

I run into a little issue today and can’t figure out the root cause. I have the a6400, when I get close to a subject, mostly black / dark fabric type of material, I will see a red dot (light / flare) ...
iWillLift's user avatar
2 votes
3 answers
2k views

Does lower resolution result in better signal-to-noise ratio, given the same sensor size?

With the release of the Canon EOS R5/R6, there have been many saying that they prefer the 20MP R6 camera over the 45MP R5 camera, due to its lower price but also because of "better low-light ...
Skeleton Bow's user avatar
1 vote
1 answer
217 views

Why does zooming into JPEG images show chunky boundaries and or noise resembling smudges of magenta, yellow and cyan?

What causes this effect? The boundaries look chunky and weird. I never seen this on PNG. I also have noticed this for JPEG images only, not PNG. For example these captcha images. The skies don't ...
user avatar
1 vote
1 answer
1k views

Why am I getting horizontal stripes/bands on sensor?

I am experiencing an issue with very apparent stripes on camera readout. Over time, a very pronounced stripe/band pattern started appearing and has a significant impact on image quality. The camera is ...
Mark Vidal's user avatar
0 votes
3 answers
269 views

Why do Bayer images of total darkness contain stripes?

The following is a raw Bayer image from a Raspberry Pi's camera (v.2):- It was taken in complete darkness, so the image simply represents all of the various noises that accumulate on a CMOS photo ...
Paul Uszak's user avatar
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1 vote
2 answers
628 views

Lightroom and noise / grain

I have this issue with lightroom, when it adds grain / noise after exporting photo. The original picture is a lot better then processed. And the particularly wierd thing is that often, right after ...
Gavrilo Adamovic's user avatar
7 votes
2 answers
2k views

How do I prevent intensive red noise on a deep-sky photo?

This is a fragment of my recent photo of the pinwheel galaxy (M 101): As you can see in this enlarged (200%) detail, the image is full of red noise, which makes all red objects (M 101 has several ...
Neppomuk's user avatar
  • 608
1 vote
1 answer
172 views

Is my sensor dying?

Please check this 100% crop of a night sky. I shot this on a Nikon D750 with a Nikkor 50mm f/1.4 D @ f/8, ISO 100, RAW format. I had already noticed that kind of noise / hot pixels (all these small ...
MrUpsidown's user avatar
1 vote
2 answers
2k views

What's the best noise reduction method to use with RAW files in an open source image processor?

I have been fighting with the noise reduction of the following image in darktable: I used this website: https://tomassobekphotography.co.nz/articles/reducing-noise-in-Darktable.php and tried all the ...
Geographos's user avatar
0 votes
2 answers
156 views

Is it normal for "modeling flash" to cause taser sounds in Nikon D80 with its built in flash?

I turned on the modeling flash option in my Nikon D80 It makes my built in flash into a temporary flashlight when I hold down the Depth OF Field button. Both the aperture stops down and the flash is ...
Delta Oscar Uniform's user avatar
1 vote
2 answers
214 views

Noisy sky with Nikon d600

I have a question regarding the shot I attached. I tried taking a pic of this landscape, but no matter how I played with the iso, going as low as 400, the sky looks really grainy if zoomed even just a ...
JamesThePowerhead's user avatar
4 votes
2 answers
607 views

Will a Nikon D810 give me more fine detail than a D610 for macro enlarged shots?

I do a lot of photography that focuses on tiny details usually with marine animals such as coral. I am in need of a camera that produces a photo, that even when enlarged from a macro point, it retains ...
MixedFruitBasket's user avatar
1 vote
3 answers
479 views

How can a camera with a small sensor have better low-light performance than a camera with a bigger sensor?

In Potato Jet's video comparing the Canon M50 versus the Panasonic G7, you can see at 8:51 that the Canon M50 has a more noisy image in low light compared to the Panasonic G7, even though the M50 has ...
Bauxite's user avatar
  • 13
0 votes
3 answers
583 views

How to avoid noise in Aperture Priority mode arising due to auto-ISO?

I was taking photos of birds in a cloudy day and in an area of forest where light was even low under a tree as compared to other areas. I used 70-300 mm kit lens. When trying to take photo even at 1/...
RKh's user avatar
  • 309
3 votes
4 answers
1k views

Why do I get noisy results when converting from raw to jpeg?

I am using ACDSee Photo Studio Professional 2019 and shooting with a Canon 80D (storing raw+jpeg files from the camera). In the past I've shot mostly jpeg files and fine-tuned them in ACDSee with ...
jmbouffard's user avatar
0 votes
1 answer
773 views

How Does Noise Reduction Work In Canon EOS 1300D?

I have been reading review of the Canon EOS 1300D by The Digital Picture and I came across noise reduction. The color blocks in this tool, being evenly-colored, provide a worst case scenario for ...
Delta Oscar Uniform's user avatar

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