Color Correction

Thomas Niemann said:

After a recent round of posts on color correction (remember the
squirrel?), I figured it was time to update my tutorial. For those
familiar with it... I split the basics of Levels & Curves off into
a separate section (Basics), and wrote a new section called Color
Correction. Included, of course, is Selective Color.

Special thanks to VG and Kent C for their generous tutoring!

Click to expand...

Thomas Niemann said:

After a recent round of posts on color correction (remember the
squirrel?), I figured it was time to update my tutorial. For those
familiar with it... I split the basics of Levels & Curves off into
a separate section (Basics), and wrote a new section called Color
Correction. Included, of course, is Selective Color.

Special thanks to VG and Kent C for their generous tutoring!

--
Thomas Niemann
Photoshop for Photographers
http://epaperpress.com/psphoto

Click to expand...

Thomas Niemann said:

After a recent round of posts on color correction (remember the
squirrel?), I figured it was time to update my tutorial. For those
familiar with it... I split the basics of Levels & Curves off into
a separate section (Basics), and wrote a new section called Color
Correction. Included, of course, is Selective Color.

Special thanks to VG and Kent C for their generous tutoring!

--
Thomas Niemann
Photoshop for Photographers
http://epaperpress.com/psphoto

Click to expand...

Thomas Niemann said:

In RGB mode, the cyan slider changes red, magenta changes green,
and yellow changes blue. However, Photoshop restricts the changes
to certain regions of the image. For example, if you choose Reds
for Colors, and move the yellow slider, it changes blues, but only
for yellow colors in the RGB image.

--
Thomas Niemann
Photoshop for Photographers
http://epaperpress.com/psphoto

Click to expand...

Thomas Niemann said:

In RGB mode, the cyan slider changes red, magenta changes green,
and yellow changes blue. However, Photoshop restricts the changes
to certain regions of the image. For example, if you choose Reds
for Colors, and move the yellow slider, it changes blues, but only
for yellow colors in the RGB image.

--
Thomas Niemann
Photoshop for Photographers
http://epaperpress.com/psphoto

Click to expand...

Hans WL said:

This is the kind of stuff anyone can get by simply OBSERVING. What
is going on under the hood? That is what I was asking about.

Click to expand...

reid thaler said:

Thomas,

It's been a while since I've visited your site, and after reviewing
it again, I'll be spending more time there.

Good info, well thought out and organized.

Thanks,

--
Reid

Kodak Brownie
Argus 126
Quaker Oats Container Pinhole Camera

Click to expand...

feivel said:

Hans WL said:

This is the kind of stuff anyone can get by simply OBSERVING. What
is going on under the hood? That is what I was asking about.

Click to expand...

it's really quite simple:
the photoshop color engine institutes it's governal sub-properties
control to limit algorithm density to corresponding color space
existant relationships, this ,of course, depends on what you choose
to limit in your "selection" (thus the name of the device)
in simpler terms: under normal circumstances color space limits
are defined (thus not absolute) until the linear characteristic in
any of an infinite number of directions is focused under a model of
deconvolution. the selective color module simply bypasses this
monodirectional mechanism by applying an algorrith which is derived
from the constraints put upon it by the non-directional (thus
reverse limiting) predefined parameters.

please see http://www.colorbull.net/genius.htm where i illustrate
the concepts more fully with equational terminology

feivel

Click to expand...

Thomas Niemann said:

Glad to see you're taking the reins on this one!

Click to expand...

Thomas Niemann said:

Glad to see you're taking the reins on this one!

Click to expand...

feivel said:

Hans WL said:

This is the kind of stuff anyone can get by simply OBSERVING. What
is going on under the hood? That is what I was asking about.

Click to expand...

it's really quite simple:
the photoshop color engine institutes it's governal sub-properties
control to limit algorithm density to corresponding color space
existant relationships, this ,of course, depends on what you choose
to limit in your "selection" (thus the name of the device)
in simpler terms: under normal circumstances color space limits
are defined (thus not absolute) until the linear characteristic in
any of an infinite number of directions is focused under a model of
deconvolution. the selective color module simply bypasses this
monodirectional mechanism by applying an algorrith which is derived
from the constraints put upon it by the non-directional (thus
reverse limiting) predefined parameters.

please see http://www.colorbull.net/genius.htm where i illustrate
the concepts more fully with equational terminology

feivel

Click to expand...

Hans WL said:

I can easily image what you would say when you are dealing with a
tough case.

Click to expand...