Participant

Answered

How to repair specific banding on a digital photo

Forum|Forum|7 years ago
December 8, 2018
6 replies
36946 views

Hey, this isn't the normal kind of color banding. We think it possibly has something to do high speed sync with the electronic shutter at 1/8000 shutter speed. It seems the electronic shutter at a high shutter speed in really bright conditions will make the banding. I wasn't aware that this was happening while taking the photos...and now I have these irreplaceable images from a vacation that are essentially ruined. I was just wondering if anyone else has experienced this or has been able to repair this somehow so that I might keep these images. I'm going to attach one of the images as an example.

Correct answer Norman Sanders

(Click on image to see @ 100%)

Change the mode to Lab Color

Choose the L channel

Filter > Blur >Surface Blur Radius 9. Threshold 15

Return mode to RGB

D

Donna5ECC

Participant

This is what happened when I tried this method - didn't work for these shots :((

davescm

Community Expert

Which method, there are two described in this thread?

Dave

G

Galini5FA7

Participant

Hi Dave,
I tried to use your high/low freq method but it doesnt seem to work.
is it the banding? or am i doing something wrong?
Really need your help here
thank you

Norman SandersCorrect answer

Legend

(Click on image to see @ 100%)

Change the mode to Lab Color

Choose the L channel

Filter > Blur >Surface Blur Radius 9. Threshold 15

Return mode to RGB

J

jdanek

Inspiring

( Filter > Surface Blur ) Nice! Worked great on the white hat, too.

davescm

Community Expert

You may be able to reduce the effect like this:

Make two copies of the image layer.

Name the lower "Low Frequency"

Name the upper "High Frequency"

Select the low frequency and apply a gaussian blur of around 6px

Select the high frequency layer and goto menu Image - Apply Image
Set the layer to use as "Low Frequency"
Set Blending mode to subtract
Scale 2

Offset 128

Click OK

Set High Frequency layer blending mode to Linear Light

Put the high frequency layer in a smart object and use High pass adjusting the radius to keep the contrast detail but remove the banding
Invert the Smart filter mask so all is black

Use a soft brush to paint on the mask until the banding goes

I added a masked copy of the original and lightly painted back in over any edge "ringing"

Not perfect, it has softened the skin, but IMO easier on the eye than the original banding

Dave

Daniel E Lane

Inspiring

Basically a frequency separation for fixing skin used to remove the banding. Not a bad idea there.

davescm

Community Expert

https://forums.adobe.com/people/Daniel+E+Lane wrote
Basically a frequency separation for fixing skin used to remove the banding. Not a bad idea there.

Yep - with the added high pass on the HF layer

Dave

c.pfaffenbichler

Community Expert

Reminds me of this thread:

Re: How to remove horizontal banding caused by LED lighting

D Fosse

Community Expert

Interesting. What's the fill light, specifically? On camera flash? Some kind of LED? That's where it is, not the background.

I've noticed with my Sony that the silent shutter tends to give these interference stripes in LED and fluorescent lighting. That's because the sensor is scanned, not read all in one. I just need to be careful to avoid a certain shutter speed range, and adjust ISO if necessary.

Fixing it is possible, but takes a lot of time. No magic button.

Abambo

Community Expert

that looks like a lot of photoshopping. I do not know any point and click solution for this.

Discussion successfully moved from Adobe Creative Cloud to Photoshop

ABAMBO | Hard- and Software Engineer | Photographer

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