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Participating Frequently
April 10, 2020
Answered

How to fix this weird steroscopic plate artifact?

  • April 10, 2020
  • 3 replies
  • 953 views

Hi everyone.

Client scanned this old stereoscopic plate and there is some sort of "interlacing"-esque artifact that is causing the overall image to look blurry. Edit: it turns out this is not a lenticular print but these are scanner artifacts.

Here's a crop:

The wavelength seems to be about 16 px, and it seems to shift the affected pixels by about 16 px horizontally as well. De-interlace only works with 1px rows, and the wave tool doesn't do the trick either as it creates its own artifacts.

 

How would you approach this fix?

This topic has been closed for replies.
Correct answer c.pfaffenbichler

Are the lines perfectly horizontal and regular? 

If so the Filter Displace could be useful, but otherwise …

3 replies

PECourtejoie
Community Expert
Community Expert
April 11, 2020

Tell the client to stop scanning during an earthquake... 🙂 Excellent job!

PECourtejoie
Community Expert
Community Expert
April 10, 2020

Hello, is it a lenticular image? 

I think most filters would not work as the difference won't be the same everywhere to create the stereoscopic effect, the illusion of movement/depth...

Participating Frequently
April 10, 2020

Hi, turns out this pattern is most likely due to the scanner so the effect is consistent throughout.

c.pfaffenbichler
Community Expert
c.pfaffenbichlerCommunity ExpertCorrect answer
Community Expert
April 10, 2020

Are the lines perfectly horizontal and regular? 

If so the Filter Displace could be useful, but otherwise …

Participating Frequently
April 10, 2020

I didn't even think of that, promising idea. I will try it.

Participating Frequently
April 10, 2020

Hi, thank you for the suggestion. Once I figured out the right gradient shape for the displacement pattern, things started to line up!