Image Help - - Flesh tone experts - help! - Page 8

Duv · #**106** 04-01-2005, 07:22 PM

Thanks for your reply Roland. It's because of my communication skills that I don't do tutorials. On the other hand your's are excellent. I think the only point I was trying to make, and perhaps incorrectly, is that the LAB Brightness channel might be better in this instance over the Green Channel. Correct me if I'm wrong but I think Luminosity and Brightness are different..Luminosity as you suggest a blend of colors and Brightness which has no such values. There have been several references to the Red Channel being blown out. Certainly 255 is not a good thing but many of the images I have produced show Red at 235 to 245..not a long way from 255. The brightness channel in LAB does look weaker than the green channel but I still think it gives better results when you blend back into Red over the Green channel without the color shifts.
I guess what I'm saying is that I don't see Realaqu's and your preference in using Green Channel blending over LAB brightness, but I don't want to flog the poor old horse to death. You did get good results..even though I think mine is better..HA!

I hope one of these days we can get into a discussion about the value of working in different Synthetic Color Spaces to achieve brightness and color corrections.

Cheers
Dave

Stroker · #**107** 04-01-2005, 08:00 PM

PS's Lum = R*0.30 + G*0.59 + B*0.11
HSB:Brightness = Max(R,G,B)
HSL:Lightness = (Max(R,G,B)+Min(R,G,B))/2

To get L in Lab, you have to convert RGB > XYZ > Lab. For just L, only Y is needed. However, to get Y, you need R, G, and B. So, RGB > Y > L. I think that's right. The weights are different depending on various things.

Something like that for the curious.

I just finished a plug-in and am putting it through some paces. So far, it seems to be doing extremely well for blasting colour cast and related things. Not sure how intuitive it will be for others, though. Few more touches and I'll let ya'll take a whack at it.

Also got a few other plugs up my sleave that could be helpful with these things.

Hopefully this weekend I'll have the time for another marathon and get things ready.

realaqu · #**108** 04-04-2005, 10:52 PM

Hi, this is realaqu

I just learned a new way to handle a case like this. maybe pretty old to all of you. just change the image mode to LAB, and create a levels adjustment layer. play with A chanel. and make another curve adjustment layer for fine tune. the result seems not bad as well.

Nanls · #**109** 05-11-2005, 06:44 PM

may be too late... just joined

Nanls · #**110** 05-11-2005, 06:51 PM

having trouble uploading

Duv · #**111** 05-11-2005, 07:31 PM

Nanis, some posts like this one I don't think you can ever be too late. Just some wonderful posts here. Is it your own effort or the original post image that you are having trouble uploading?

Realaqu. You can get wonderful results working in LAB. It's not particularly intuitive but I often find it's worth spending the time there. It's not a garden that everyone wants to plant their seeds in though. Wouldn't mind seeing what you came up with.

Dave

tzec · #**112** 05-15-2005, 03:29 PM

had a go. Took a great deal of adjustment! I used multiple adjustment layers, with copies of the originals blended in at various points to keep detail. Some facial coloring painted in by hand; lighting a balanced slightly with an overlaid gradient layer.

realaqu · #**113** 05-31-2005, 08:32 PM

Hi, Duv,

sorry about my late response, I didn't read this thead. the final result in LAB I have attached. but forgot the detailed steps.

Duv · #**114** 05-31-2005, 10:43 PM

Realaqu, just a few concerns:

1) The skin tones are just a "little" too plausible.
2) Sorry, my wife's lips are the same color tonite.
3) Rex's original post says she has dark green eyes. Unfortunately, your last effort shows that she has dark green eyes.

Please repost when you get things right.

Dave