Compare Variant colour/ exposure shift

Will King

• 2017年09月20日 09:05

When setting a compare variant I get a perceived shift in exposure/colour balance when displaying images side by side.

To show you what I mean if you open a session (preferably of colour critical images).

Select an image and create a clone (just to ensure what I am seeing is not flash variation). Select the primary variant as the compare variant and then view the clones side by side. They should display exactly the same. Yet I can perceive that they are not and others around me, assistants and clients can also perceive that they are not.

It is quite subtle but noticeable and for colour critical work disconcerting. I have tried moving the images around to different points of the monitor to test that it isn't that. I can reproduce this on my MacBook Pro Touch Bar and my Eizo.

Am I mad or is there a shift in the Compare Variant when displayed as such?

Any one else recreate this phenomena before I create a case.

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  SFA

  • 2017年09月20日 22:49

  Interesting observation. Not something I had noticed but I rarely do anything that I would consider to be colour critical.
  
  Now, you have the same computer using the same screen and processing the same data using the same software.
  
  The only obvious variable might be screen temperatures but you seem to have considered screen variability already.
  
  What happens to the perception if you DO NOT set the Compare Variant? Just display the images side by side?
  
  What happens if you display just a single image and switch backwards and forwards between the two?
  
  What happens if you set up three variants and cycle round them using the arrow keys or change between then in random orders?
  
  Which background are you using?
  
  Any other variables in the mix? Ambient light effects, daylight colour balance on one side monitor?
  
  What do the colour pins tell you (assuming you can pick the identical point in both variants.)
  
  All colours or just some of them affected?
  
  How quickly to your eyes recover from retinal fatigue?
  
  Grant

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  Petr Odehnal

  • 2017年09月23日 15:07

  Color Readout is reporting different values?

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  peter Frings

  • 2017年09月27日 08:45

  Maybe the rather heavy orange border is influencing the perception?. As Grant suggested, do you see the same difference when displaying them in multi-view mode? (Maybe try showing 3 of 4 so that the thicker white border of the primary variant is not on any of the 2 variants you want to compare, just to be sure).

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