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06-17-2014, 07:39 PM   #1
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How to remove green cast

I'm not sure if this is the right place for this.
I bought a piece of #10 welding glass in lieu of a Big Stopper ND filter
I knew there would be a color cast when I used it, but I am having a real hard time removing it in lightroom
Any thoughts would be appreciated. I have attached a test photo.

Thank You.

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06-17-2014, 07:45 PM   #2
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Opposite of green is red :-) That is a bit more than a "cast", however, so add a lot of red...I'm not sure it is salvageable.
06-17-2014, 07:49 PM   #3
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Moved to correct forum. General technical troubleshooting is not about photo editing, digital processing is, though.
06-17-2014, 07:51 PM   #4
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I don't think there's much you can do to save this image other than to convert it to a B&W, since all the color channels have been tainted with green. Here's the best I could do by toying with the green channel:

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06-17-2014, 09:07 PM   #5
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I was able to get a bit farther with it in Photoshop, but it required extreme adjustments- no way you would get decent results. I could have improved it a bit more by adjusting curves for individual colours, but even that would be nasty- looking. A proper ND filter would cost a lot less than Photoshop, I think.



---------- Post added 06-17-2014 at 09:42 PM ----------

Later: Here it is with the red curve tweaked a bit. The green looks somewhat oversaturated when displayed in my browser, but I'm not going to bother with it.


Last edited by John Poirier; 06-17-2014 at 09:46 PM.
06-17-2014, 10:07 PM   #6
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Thanks for the quick replies! For the six dollars and change it cost me it was worth a try.
06-17-2014, 10:20 PM   #7
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QuoteOriginally posted by Shredder Quote
Thanks for the quick replies! For the six dollars and change it cost me it was worth a try.
I'm sure you could come up with some nice B&W shots--it's not a total loss.
06-17-2014, 10:50 PM   #8
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I don't know why you have such a green cast from welding glass? Welding glass is often suggested on various videos as a alternative to a big stopper.
Perhaps it's that particular brand of glass? Why not take your camera to the vendors shop and test there?
As a matter if interest when you look at the sun through it does it look green?
I have used welding helmet glass for that and it was not green, however I have also used very dark green lenses in goggles used when using a oxy- acetylene cutting torch , perhaps you got sold the wrong thing?


Last edited by adwb; 06-17-2014 at 10:55 PM.
06-17-2014, 10:52 PM - 1 Like   #9
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You can get a somewhat more natural result with the hue/saturation tools in PS if you adjust each channel separately.

Last edited by DeepThrob; 01-28-2015 at 08:56 PM.
06-18-2014, 04:03 AM   #10
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QuoteOriginally posted by Shredder Quote
I'm not sure if this is the right place for this.
I bought a piece of #10 welding glass in lieu of a Big Stopper ND filter
I knew there would be a color cast when I used it, but I am having a real hard time removing it in lightroom
Have you tried using the custom white balance on your camera before shooting?

Tim
06-18-2014, 05:48 AM   #11
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Would cwb work with a piece of glass that dark?
06-18-2014, 07:02 AM   #12
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Has any one tried remove color cast in Nik Color efex to see if that would help
06-18-2014, 11:17 AM   #13
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QuoteOriginally posted by atupdate Quote
Have you tried using the custom white balance on your camera before shooting?

Tim
Yes, I tried, and the camera said unable to complete operation, or words to that effect.
I also tried taking a shot of a white piece of paper and doing custom WB in LR, but that merely made the shot a slightly less green.

---------- Post added 06-18-14 at 02:18 PM ----------

QuoteOriginally posted by adwb Quote
I don't know why you have such a green cast from welding glass? Welding glass is often suggested on various videos as a alternative to a big stopper.
Perhaps it's that particular brand of glass? Why not take your camera to the vendors shop and test there?
As a matter if interest when you look at the sun through it does it look green?

Yes, it is green when you look through it.

---------- Post added 06-18-14 at 02:20 PM ----------

QuoteOriginally posted by DeepThrob Quote
You can get a somewhat more natural result with the hue/saturation tools in PS if you adjust each channel separately.
That actually looks pretty good. Can you give me a little more detail on the adjustments you made if you don't mind?
06-18-2014, 12:28 PM   #14
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The information is there tp be pulled so it depends what you see as original colour and how much saturation and pop you want, this is a few quick tweaks

Last edited by Imageman; 07-18-2014 at 08:26 PM.
06-18-2014, 02:02 PM   #15
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QuoteOriginally posted by DeepThrob Quote
You can get a somewhat more natural result with the hue/saturation tools in PS if you adjust each channel separately.

Not bad.
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