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Participant
November 22, 2023
Question

vertical gray strip

  • November 22, 2023
  • 3 replies
  • 1139 views

Hello everyone,'m working on a project in Photoshop 2024 where I need to align some photos, and not always, but one of the photos has a string of pixels (so far always vertical on the right side) that turns gray. I don't understand the reason. Can anyone provide me with an answer? Is it normal and why does this appen

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3 replies

c.pfaffenbichler
Community Expert
Community Expert
November 27, 2023

I suspect this is resampling-related. 

In the screenshot the upper two Layers were scaled to 10%, the lower two were scaled to 10% as flat images.  

 

CalceAuthor
Participant
November 27, 2023

Hi c.pfaffenbichler, you're right ! Thanks a lot!

c.pfaffenbichler
Community Expert
Community Expert
November 28, 2023

For existing files you could use 

• Layer > Layer Mask > From Transparency 

• alt-click the Layer Mask’s  icon in the Layers Panel to select and show it 

• Image > Adjustments > Threshold with an appropriate value

Participating Frequently
November 25, 2023

I've had a similar issue before when working in Photoshop. That gray pixel thing can be super annoying. It's usually due to some compression artifacts or glitches in the image file. Try saving the image in a different format or adjusting the compression settings when you export it.

Kevin Stohlmeyer
Community Expert
Community Expert
November 22, 2023

@Calce you are zoomed in at over 2000%. What does this look like at 100%?

CalceAuthor
Participant
November 25, 2023

Hi Kevin, if the string of pixels is one it has almost no effect (you see a light white line), when they become 3 or more they are much more noticeable. I'm attaching a screen of mosaic tiles that I'm working on now at 74%

Trevor.Dennis
Community Expert
Community Expert
November 27, 2023
quote

Hi Kevin, if the string of pixels is one it has almost no effect (you see a light white line), when they become 3 or more they are much more noticeable. I'm attaching a screen of mosaic tiles that I'm working on now at 74%


By @Calce

 

You can only reallyy trust what you see when zoomed at 100% or 1:1.  You could be seeing a display glitch, but you need to test at 100% zoom ratio first, and maybe even save out to JPG, and open in another image viewer.