Questions tagged [noise]

Image perturbation caused by electronic transformation and processing.

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92 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 ...
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1answer
58 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) ...
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3answers
254 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 ...
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1answer
110 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 ...
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1answer
110 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 ...
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3answers
116 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 ...
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2answers
96 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 ...
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2answers
289 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 ...
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1answer
96 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 ...
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2answers
240 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 ...
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2answers
64 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 ...
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2answers
133 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 ...
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2answers
364 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 ...
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3answers
221 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 ...
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3answers
178 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/...
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4answers
332 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 ...
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1answer
314 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 ...
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1answer
270 views

Long exposures create red noisy glow.. but only with one of my lenses. Why?

I recently started having a problem with long exposure (30 sec +) photos having a pattern of red noise. The problem started in the middle of a camping trip - long exposure pictures looked fine one ...
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7answers
12k views

Is it true that “only photographers care about noise”?

I have been doing a lot of research lately in planning an upgrade to my old D70. One thing that has really jumped out at me is that I've seen the same general phrase repeated on three different ...
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3answers
187 views

How to get rid of brighter dark areas of the object while taking photo or by editing it later?

I'm having a little hard time taking photos of my pencil drawings. I recently posted a question about noise & blurriness. Here the thing is, my art looks much better on paper but when I take ...
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2answers
163 views

Photos taken with Canon ef2 24mm lens on a Canon 200D are incredibly noisy

I Just purchased a canon 24mm lens that i am using on my Canon 200D. The first few test shots I took came out full of noise. I just assumed that this was a lighting issue (dimly lit room) but after ...
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3answers
816 views

What is causing these stripes in my images?

Please don't mind the edited faces. All over the image are visible white stripes horizontally. What could cause them? The image was taken without a flash on a Canon 5D Mark II. Could this be a sensor ...
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2answers
199 views

What causes this leather-grain pattern of noise in the sky when I inspect with a sharp mask?

Noticed these strange patterns in the sky while adjusting sharp masking with "alt" key in Lightroom. In normal mode picture seems alright (and exported variant looks normal too), but I can't be sure ...
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2answers
636 views

Which ISO should I use for the cleanest image? [duplicate]

Assume the case of a Canon 6D Mark II. Its lowest ISO is regulary 100. If expanded, I can set it to L, which is ISO 50. Until now, I was always under the impression the lower the ISO the cleaner the ...
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3answers
721 views

Does red noise even at low ISO values mean a hardware problem with my camera's sensor?

I have an Canon 200D (Rebel SL). I am concerned about the red noise in the darker parts of the picture, at low ISO values. Especially in the blue sky. Could this be a hardware problem with a sensor? ...
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1answer
612 views

How to reproduce camera noise reduction using open source software?

I have unsuccessfully tried to reproduce the camera's (Canon EOS 2000D) noise reduction algorithms using open source software when post-processing RAW (.CR2) files. Specifically, the camera's noise ...
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1answer
188 views

Why is same image exposed at 100 ISO noisier than 3200 ISO? [duplicate]

I used to believe that ISO adds noise as a drawback to increasing exposure, but after researching the topic I arrived at the conclusion that it is a misconception. By amplifying the existing signal ...
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2answers
203 views

dB ratings for sensor SNR, what do they specify exactly?

I find the use of dB values to specify sensor properties confusing.. A rating of 20dB SNR at a given ISO setting could mean, assuming a reasonably linear system: RMS noise voltage and thus luminance ...
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2answers
661 views

Will a full frame camera reduce noise vs. my Canon T7i for high school wrestling and football?

I’m looking to get my first Canon full frame. I mostly take photos of high school wrestling and night football. I would like to stay around $1000. Currently I have a T7i. Is there any advice as to ...
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1answer
209 views

Why does a non-linear relationship exist between noise level (of dark frame) and ISO setting

According to Does changing the ISO of a modern digital camera really change the gain of an electronic amplifier?, the ISO physically amplifies signal in analogic way, so it is more effective than ...
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1answer
197 views

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 ...
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2answers
129 views

Is there a way to use B&W conversion to reduce noise

My understanding of noise is that it's caused, effectively, because photos aren't evenly distributed accross time. So if you are shooting in low light, you get more noise because there aren't enought ...
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2answers
323 views

Red noise in lower edge and corners

I would like to ask for your opinion whether in your past experience you have seen similar kind of red noise in lower parts of your pictures in low-light settings? It shows up in lower edge and ...
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3answers
306 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 ...
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2answers
3k views

Signal to Noise Ratio over the years

I've been enjoying Marc Levoy's Lectures on Digital Photography and have reached this point. Marc has broadly said: Sensors have got better at reducing noise But pixels are gotten smaller so there ...
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2answers
301 views

How to get bright concert photos?

I've been starting to shoot some live music recently and have been doing an okay job and see an improvement with each time I shoot. However recently I was shooting and all of my photos have come out ...
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2answers
354 views

D800 suffering excessive noise at low ISOs

I have previously owned a D610 and I find the image quality of the D800 to be somewhat inferior. The following at 1:1 crops that are much more noisy than the d610. The following were shot at ISO 800 ...
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3answers
3k views

Do mirrorless cameras have more sensor noise because they are constantly exposed to light?

I have been wondering if the following is true and the implication for mirrorless cameras. DSLR camera sensors are only exposed to light when the picture is taken, so the sensor presumably produces ...
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3answers
193 views

What is wrong with this photo? [closed]

I just got a new camera (Panasonic ZS60) and I've been running into a few problems/questions while testing. Mostly it seems like leaves have a low-resolution, watercolor-like appearance in low-light ...
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4answers
2k views

Multiple copies of the same exposure, but randomizing the noise?

As a budding astrophotographer, I find my results are still largely hit or miss. Sometimes the standard procedure of stacking multiple exposures to randomize the noise and boost the signal works ...
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2answers
236 views

RAW (.dng) on my Phone (OnePlus 5) vs on Picasa 3 (Noisy)

I recently took a long exposure shot of the sky at night on my OnePlus 5. The RAW image when viewed on phone turned out to be great, pitch black sky and white-red-blue stars! Pretty excited, I decided ...
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3answers
2k views

How to avoid the grainy background in sunset picture?

I was taking this picture of the sunset. I used auto focus, but the trees are not really that focused. Also, the red background is grainy. Any tips if I get this opportunity again? I was using a ...
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4answers
571 views

Why do cameras include very high ISO settings even though they are so noisy?

Why do they make DSLRs' ISO settings go so high? I own three different Nikon cameras and every one of them, once you pass a pathetic 320 ISO, the noise in my photos is lousy and — all 3 cameras cost ...
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3answers
175 views

What do I need to change to prevent this denim looking grain/noise in my product photos?

I'm an amateur and I'm reading everything that I can to learn how to take decent product photos and get the best out of the equipment that I have... My question is specifically, what is likely causing ...
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2answers
143 views

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 ...
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1answer
86 views

What should I look for in a phone camera to get results with less noise in HDR photos?

I have a Samsung J7 (2017) phone and am happily shooting HDR photos with it, with the Pro HDR Camera app. I'm happy with the results except for the noise level. I think my noise problems occur in low-...
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4answers
866 views

How should I interact with a loud amateur photog when I'm making a personal audio recording of an acoustic performance?

I was at a large prestigious high school music concert this past weekend where I wanted to record the audio on a hand-held audio recorder, as my daughter was performing with one of the groups. I was ...
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7answers
511 views

How do I know which combination of aperture and shutter speed yields enough light to have pictures with minimal noise?

This is a kind of continuation of this question. I'm shooting a poorly lit object. Camera has fastest ISO value of 3200. I set aperture to some specific value and don't alter it, the object is ...
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6answers
5k views

Why would using higher ISO and faster shutter speed yield more noise than using lower ISO and slower shutter speed?

I'm trying to see how this answer correlates with practice. That answer basically says I need to let enough light into the camera and then use the highest ISO value and I'll get the lowest noise then. ...
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4answers
606 views

Why are my low light photos noisy /blurry, but Alien is perfect?

I know that there are a few questions here already about low light photography and image noise. I want to know why Ridley Scott can shoot very low light scenes (including publicity stills), yet I can'...