Exposure changes when changing background colour!

[default92skw24cxfvn]

Hi there!

I have a problem with my image exposure changing when I change the surrounding colour. 

So for example if I crop the image and hit "lights out" the image exposure will go up or down depending if the background/border is light or dark! This also happens if I soft proof, change the workspace border or export it to then view it with a white border.

It's a real pain as I can edit it to how I want it and then when i soft proof it or export it and view it with a white border its completely out and different. I then have to go back and adjust it, export it to see how it comes out and so on.

I'm using the most resent version of lightroom on windows 10pro. 

I bought a refurb PC to replace my last one and I admit the graphics card is old and not great if that's any help?

Many thanks, hope someone can help. 

[GoldingD]

Is this an observation via your eyes, perception? Or does the exposure slider change?

[default92skw24cxfvn]

Hi there, it was via my eyes not the slider. But i have tried again tonight and it isnt doing it! One thing i am going to look at is night mode on my PC. 

I will keep you posted 🙂

[johnrellis]

"if I crop the image and hit "lights out" the image exposure will go up or down depending if the background/border is light or dark!"

Possibilities:

- Human perception of color and tonal range is affected by the bordering color.  

- Some displays have a dynamic movie mode that adjust the brightness of the display based on what's being shown. Check the display's manual and its on-screen display menu.

To verify it's not LR or the operating system that's doing this, make two screenshots, one with lights-out enabled and the other disabled.  Then crop the two screenshots identically and compare -- almost certainly they'll be identical.

[default92skw24cxfvn]

Hi there, i have tried again tonight and its back to normal! I am going to look at the screen profiles and also the night mode on the PC. If it happens again i will do the screen shot to see. But i have to admit i think it was playing up as it was quite noticeable. 

Thanks for the reply, i will keep you posted 🙂