Old 01-13-2009, 09:11 PM   #1
bigbassloyd
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Default My first attempt with layers

Last night I downloaded GIMP, in an experiment to attempt to learn how to use layers to save shots with less than perfect light.

Here's my first attempt with a recent shot in cloudy conditions. I exposed for the sky, to keep the details, and tried to brighten the ground and train. I'd like some feedback on the attempt, good and bad.

The first attachment is the straight from the camera jpeg, resized to 1000x667 and saved at a size for attachment. The 2nd one is the final shot, resized for attachment as well.

Thanks in advance!

Loyd L.
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Old 01-13-2009, 10:08 PM   #2
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Do you have a color version of the final, because the train gets lost black and white.
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Old 01-14-2009, 12:56 AM   #3
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Ewwww...did you desaturate or use the channel mixer? The tone of the paint on the loco looks wrong for b&w. Looks like you might have used the channel mixer, but the wrong channel.
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Old 01-14-2009, 01:46 AM   #4
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Hi Lloyd, hope you don't mind me taking a quick shot at this. The way I describe is merely one way of doing this type of adjustment with layers. A quick shadow/highlight adjustment in Photoshop gave nearly identical results in about 20 seconds. I haven't used Gimp before, so I don't know the exact terminology or capabilities, but in Photoshop, I opened it up and applied 2 Levels adjustment layers with no changes. You could get the same effect by duplicating the background layer twice, but with a much larger file size (at least until you flatten the image).

I set the blend mode for one of the new layers or adjustment layers to "screen" to lighten the image, and masked off the sky so only the train gets brightened. For the mask, I simply selected the whole image and pasted it into the mask, then adjusted the levels in the mask to take the sky to black.

Then, I changed the blend mode for the other adjustment layer to "multiply" to darken the sky. I copied the mask from the first layer and pasted it into the 2nd layer's mask, then inverted it. Now the darkening won't affect the train. That's it, a few minutes at most. Here's a screen shot of the layers palette showing the layers and masks. Hope that helps.
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Old 01-14-2009, 10:23 PM   #5
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Thanks for the comments and suggestions guys!

Jim - I'm not sure what I did to be honest. It consisted of "read a little bit, jiggle a little bit"

Rf Ohio - Sorry, I switched it to B&W first off.

Loyd L.
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Old 01-15-2009, 12:57 AM   #6
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Quote:
Originally Posted by bigbassloyd
Jim - I'm not sure what I did to be honest. It consisted of "read a little bit, jiggle a little bit"
I was going to fiddle around with the color version to see who you arrived at that, but I haven't had a chance yet.
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