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Trees allow second chances - Camilla Fox

May. 20th, 2003

11:31 pm - Trees allow second chances

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I haven't done much since the weekend, but I did play with gimp a little.



(original is here)

The greyscale is a cheap trick to cope with it just not having very interesting colors. I reversed the blue channel before losing the colors to try to reduce the relative darkness of the twig.

The rest of Saturday's roll contains less in the way of focus problems (I'm still sorting through them) but I am starting to really want the ability to control depth of field.

Comments:

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From:rjpb
Date:May 20th, 2003 09:39 pm (UTC)

Nice...

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I like how the light through the leaves seems brighter than the sky. Baby oak leaves are so pretty. :)
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From:crs
Date:May 21st, 2003 04:51 am (UTC)
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Could you try turning the red waaaay up in the berries in the original? The original was very nice as is, I thought.
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From:cfox
Date:May 21st, 2003 01:20 pm (UTC)
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It took me a while to get my head around it, but if I do an RGB decomposition on the original, the green and red channels look almost the same, so turning up the red just makes the sky mauve without bringing out much in the way of details.

Here's where the reds actually are, if I do an HSV decomposition, and use curves to pick out the reds on the hue part.


If I try picking out particular colors, I find that many of the browns on the buds and tassle are shared with the edges of the leaves, and can't be safely brightened. The trick is that I need to say "more red than anything else" rather than "near this brown" to be sufficiently selective.

I was playing with overlaying the red part of the hue decomposition on top of the unmodified image, but the result is a little mangy looking, and gimp crashed as I tried to save it.

I'd punted the stuff on the right when I cropped it because I didn't like how the bottom of the tassle was out of focus; if I'm not allowing myself to spot-edit, I should have been more careful about setting up the shot.
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From:cfox
Date:May 22nd, 2003 06:25 am (UTC)
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Here's what I get if I add the red values back in, with a gaussian blur over that layer to make it less grainy.

It does work well on the tassle, but the twig buds look scary to me.
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