Re: Color balancing images
Re: Color balancing images
- Subject: Re: Color balancing images
- From: Oscar Rysdyk <email@hidden>
- Date: Wed, 15 Nov 2006 09:54:16 +0100
Where would you read the "average" in the Levels dialog?
The average is in the histogram palette, expanded view, show statistics.
Unfortunately you have to select the channel first, then the levels
command, so that the histo shows stats for that particular channel.
Invert as in Image > Adjustments > Invert?
- Select and delete the Lightness channel (Make L = 100%)
- Set layer mode to Multiply
Yes, since the L channel is ignored in the next steps.
Here's another quick & dirty method for RGB mode:
- duplicate the image layer,
- Filter -> Blur -> Average
- Add levels adjustment layer and click middle gray on the average color
- remove the average color layer.
Note that I opted for levels corrections in the RGB methods because
it's the easiest to adjust quickly with keyboard control. It may be
that a curves correction is better suited for the task...
I've been trying this because I would very much like a kind of "Color
Cast" slider in the RAW processing options as opposed to color temp
and tint.
Wouldn't that be awesome.
Yes, it would. I think it better corresponds to how Photographers and
Prepress "think" about image reproduction. Temp & Tint is a typical
result of an engineer's approach to a 2 dimensional problem. But it's
an erroneous application of the original concept, and a confusing use
of the word. (It certainly has no relation to the "tint" of a
"colorcast").
A colorcast slider could be fairly easy to implement. It could still
be a + and - slider, so that one can introduce an opposite colorcast.
And if the software does not detect a colorcast, it can simply resort
to the current "tint" method. If it includes a colorpatch, one can
use a pipette, or even select a totally custom color.
Regards,
Oscar Rysdyk
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