Quick question. Is it legal to use labcolor sharpening in basic editing?
You might want to ask the SC. I don't remember this question coming up in the forums before. The basic rules say that you can apply the USM filter, as long as you apply it to the "entire image." I don't know if sharpening a single channel (the lightness channel in lab mode) violates the "entire image" rule or not.
I've never had the need to do this on a basic editing image, so I've never tried to find out.
You can convert between color spaces in Basic, so converting to LAB and back is fine. You can also run an otherwise-legal operation on a single channel in Basic, as long as it's run globally (on the *entire* channel). So yes, you can convert to LAB, run USM on the Luminosity channel, and convert back.
Well blow me away - I've never heard of such a process - if someone could please enlighten me as to the steps of lab color sharpening! Thanks in advance!
Well blow me away - I've never heard of such a process - if someone could please enlighten me as to the steps of lab color sharpening! Thanks in advance!
A better way to sharpen just the luminosity channel without changing to Lab Color is to perform sharpening as you usually would (e.g., using Unsharp Mask), then choose Fade Unsharp Mask from the Edit menu. In the dialog that appears, change the Mode from Normal to Luminosity and click on the Okay button.
Well blow me away - I've never heard of such a process - if someone could please enlighten me as to the steps of lab color sharpening! Thanks in advance!
Go to mode under image menu and convert to labcolor. Under channels you will see a luminosity chanel and a and b. a and b are wierd color channels. Select the luminosity channel and sharpen that with usm. You can use more usm than ususal, without getting color noise or color halos. Convert back to rgb. I think too cool is right, you can't use different blending modes in basic, but this isn't quite the same.
But I thought that you could not change modes in basic...
You're probably right, but I think the rules might only address layer modes. Modes in the "Fade" tool may be a new thing with CS3.
I just did a little playing in CS2, and the functionality of Edit>Fade with blend mode selection is present there as well. I don't have anything older available at the mo, so I can't say whether the capability is there in CS.
The fade command is available for most editing operations if performed immediately after the step. That includes pretty much everything under Image>Adjustments and under Filter. Both opacity and blend mode may be changed, and all blend modes are available in the drop-down.
AFAIK, changing the blend mode in the Edit>Fade command is a no-no. (ETA: a no-no in Basic, that is)
Yes, edit/fade under a blend mode is illegal in basic. In basic you have to do it the long way, converting to Lab Color and then sharpening the luminosity layer and then reverting back to RGB mode. It's one of those lovely inconsistencies we have to live with :-) I was just discussing an easier way to do luminosity-channel sharpening, not advocating it for basic editing. But now I realize the THREAD is about LAB color in basic editing, so my bad :-)
ok... so the lab color method is the work around for basic... got it... I've used highpass sharpening (which I know isnt legal in basic) in the blend mode of luminosity before, but this gives me more to ways to work.... Thank you!!!
