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19 votes
Accepted

Solve unwanted white "waves" and "Pacman squares" in low-light picture - post using Google Photos

This is known as "banding". Dark parts in the picture have a small range of values (in a JPG, you only have 256 values per color), when you lighten them, you increase the gap between consecutive ...
xenoid's user avatar
  • 21.5k
19 votes

Removing "banding" lines caused from using silent shutter

I don't use Photoshop, so here it is done with Gimp, but I assume the same tools are available on PS: Use Wavelet decompose to decompose the image into its frequency components (these are images that ...
xenoid's user avatar
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13 votes

Removing "banding" lines caused from using silent shutter

This "banding" is caused by the primary light source in the image varying in intensity over time, and by the (electronic) rolling shutter in the camera converting this variation over time ...
Ilmari Karonen's user avatar
5 votes
Accepted

What is the name of the problem where lines appear in a photo where there should just be a smooth gradient?

Probably the word you search is "banding". You can get more information here. Quoting: Colour banding is a problem of inaccurate colour presentation in computer graphics. In 24-bit color modes, ...
Romeo Ninov's user avatar
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5 votes

Solve unwanted white "waves" and "Pacman squares" in low-light picture - post using Google Photos

This is named banding. And it's caused in your case by overprocessing the image. What you can do is to take the photo in RAW and postprocess it. When postprocessing mask the sky and do not increase ...
Romeo Ninov's user avatar
  • 12.2k
5 votes

LED lighting problem: Bands of uneven exposure on images taken under LED lighting with silent shutter (full electronic shutter)?

Way back in 2014 Canon introduced a feature with the 7D Mark II that they called flicker reduction. Basically, the camera uses the light meter to detect the timing of flickering lights and then times ...
Michael C's user avatar
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4 votes
Accepted

Will there be (stronger) colour banding on 8bit wide gamut display when working in sRGB?

This is a valid concern. My understanding of your question is that it's a monitoring problem rather than editing problem. That is, when you are editing an sRGB photo, you specify that your current ...
Zeus's user avatar
  • 1,549
4 votes

Does higher resolution in an image imply more bits per pixel?

A pixel can be understood as a 3-dimensional thing. A pixel holds information. How "deep" this information can be is the trick. Pixel Depth Here is a representation of one pixel. On the left,...
Rafael's user avatar
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4 votes
Accepted

Does higher resolution in an image imply more bits per pixel?

Image resolution (amount of pixels) and bit depth (bits per pixel) can be changed independently. Any combination of high/low resolution and more/less bits per pixel is possible. Sometimes, however, ...
szulat's user avatar
  • 5,059
3 votes
Accepted

Why are there subtle off-color arcs in my photos?

This is known as "banding". This happens when you have uniform color gradients and the quantization by the camera (because JPEG is only 8bits/channel) transforms them into uniform areas. Along the ...
xenoid's user avatar
  • 21.5k
3 votes

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

Even when the sky appears uniform to our eyes, it isn't. The index of refraction of air is affected by a number of things (e.g. the shimmering mirages you see over a hot road) - temperature, humidity, ...
twalberg's user avatar
  • 5,148
3 votes

Removing "banding" lines caused from using silent shutter

Banding is very difficult to remove. If you are lucky, the band itself has no falloff of light in itself. Which it seems is not the case here. However, what you could try, is to basically equalize the ...
Kai Mattern's user avatar
  • 4,508
3 votes

Best way to photograph a LED wall (that has people in front of it)

You have diferent issues here. Lets separate them. 1) You have a bright wall and dark people... It is the same case as if you have a bright window with people on an interior. Your options are limited....
Rafael's user avatar
  • 25k
2 votes

Best way to photograph a LED wall (that has people in front of it)

Your ways are: using any film to record images instead of digital technology using the camera with strong enough AA filter using the camera with surplus of resolution (medium format cameras, may be ...
Euri Pinhollow's user avatar
2 votes

How can I avoid circular banding artifacts in clear skies when de-noising?

I have made a circular 8 bit gradient with sampled edge colour and center colour. This illustrates that it clearly is not the 8bit quantisation problem. I have also took a stare at the source, non-...
Euri Pinhollow's user avatar
2 votes

Does higher resolution in an image imply more bits per pixel?

Not in common digital imaging terminology. Instead, we call bits-per-pixel bit depth. Once unpacked from whatever compression format they were stored in, digital images are usually represented as ...
mattdm's user avatar
  • 143k
2 votes

How can I prevent banding in images I'm posting on the Internet?

Banding and blotchiness in images is often caused by excessive post processing. There are a few ways to avoid causing such effects: Capture in RAW and post process with high bit-depth color. Make ...
xiota's user avatar
  • 27k
2 votes

What is causing this pattern of horizontal and vertical lines in my pictures?

You note that the pictures are CR2 images. These are Canon RAW files — they are not, in that state, usable for sharing and printing and so on. You need software to convert them. The most popular such ...
mattdm's user avatar
  • 143k
2 votes

Will there be (stronger) colour banding on 8bit wide gamut display when working in sRGB?

The actual problem occurs due to the accuracy of the math (editing bit depth) and not the color space itself. I.e. you can edit in sRGB with 16 or 32 bit accuracy in photoshop and (largely) avoid the ...
Steven Kersting's user avatar
2 votes

What causes bright banding in CMOS sensor?

That is a readout issue that can occur with CMOS sensors. It is essentially the same thing as CCD "smear;" only in a horizontal direction rather than vertical, and CCD sensors are much more ...
Steven Kersting's user avatar
2 votes

LED lighting problem: Bands of uneven exposure on images taken under LED lighting with silent shutter (full electronic shutter)?

The problem is, that the camera does not do a full sensor readout in one go (or global shutter), but reads the sensor linewise. LED light is often pulsing to dim the light. So when you see a LED that ...
Kai Mattern's user avatar
  • 4,508
2 votes

Major color banding on some photos - Pentax k1 mark ii

Based on the photo you have a problem with SD card (storage or reading/writing process). As you can see these errors have more or less random nature so it is not something related to the sensor. You ...
Romeo Ninov's user avatar
  • 12.2k
1 vote

Major color banding on some photos - Pentax k1 mark ii

These look like JPEG decoding errors, indicating that your file is corrupt(*). If you post one of the JPEG files somewhere (take a picture of an object if you have privacy issues) one of us can ...
xenoid's user avatar
  • 21.5k
1 vote

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

In my opinion this can be some normal background noise generated by the sensor, amplified by Your post-processing. I found a similar pattern at high magnification on pictures taken with Olympus E-510 ...
Old Aperture's user avatar
1 vote

What causes bright banding in CMOS sensor?

This is caused by saturation of the sensor. If the pixel well is overloaded, electrons leak in to neighboring pixels which causes the streak. A nice article that has a more in depth explanation.
qrk's user avatar
  • 3,036
1 vote
Accepted

Why am I getting horizontal stripes/bands on sensor?

These are dark images (cap on). With severe stripes it can be very noticeable on uniform lighting and sharp contrast transitions as well but it is most prominent in low light scenarios. The increase ...
Michael C's user avatar
  • 175k
1 vote

Solve unwanted white "waves" and "Pacman squares" in low-light picture - post using Google Photos

Even if you processed the raw files initially, when you upload them to sites such as google photos, they may compress them further to reduce the bandwidth needed to transmit them to viewers. This ...
Michael C's user avatar
  • 175k
1 vote

How do I save this 'band-less' version of this image from ACR?

Banding is due to quantization. If you have a very slow and regular color gradient, and not many available values dues to low bit-depth (8-bit channel), at some point along the gradient adjacent ...
xenoid's user avatar
  • 21.5k
1 vote

Why am I seeing banding with Photoshop but not Lightroom?

What you may be seeing is fake banding created by Photoshop. It takes shortcuts to display layered files more quickly that sometime affect the actual appearance of the image on the screen. To check to ...
Ed on PCR's user avatar
  • 715
1 vote

What is the name of the problem where lines appear in a photo where there should just be a smooth gradient?

This is color banding (not to be confused with "banding noise", which is entirely unrelated). It can be caused by posterization due to insufficient bit depth for smooth gradations in a small color ...
mattdm's user avatar
  • 143k

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