How to analyze saturation of an image

[santoro80]

There was a link on ModelMayhem which showed a way how to display the degree of saturation of different parts of some image. I cant find the link. Does anybody know what I'm talking about? Dont know how to describe it...

I know I can analyze color of an image by duplicating original layer with color blending mode and putting 50% grey layer between them. But how to see a saturation of particular image?

[ShadowLight]

saturation mask?

Selective Color (absolute)
Reds,Y,G,C,B,M: Black -100%
Whites,Neutrals,Blacks: Black +100%

[santoro80]

Yes, probably. Thanks.

[redcrown]

The Selective Color adjustment is one way to generate a saturation mask. It's a useable mask, but it's results do not agree with Photoshop's own measurement of saturation.

Another way is the "optional" HSB/HSL filter. That filter is not installed by default with Photoshop. You have to go look for it in the original distribution media and install it by hand.

Set one of your Info Pallet values to "HSB Color" and pick any spot on an image. Say, for example, that spot shows a saturation value in the Info Pallet of 60%. That's Photoshop's definition of saturation.

In a saturation mask, that spot should have a "gray" value equal to 60% of the range 0-255, or 153. The Selective Color saturation mask will probably not be 153. The HSB/HSL filter mask will be 153.

The Selective Color saturation mask values will vary depending on saturation AND brightness, the HSB/HSL saturation mask will measure saturation only, independent of brightness.

Every method of increasing saturation also increases brightness. So, some argue that the Selective Color mask is better since it factors in brightness. Others argue the HSB/HSL filter is more accurate and thus more useable.

[santoro80]

How do I install this filter? I have Photoshop CS6. I dont have the older versions.

[redcrown]

Here's the one that works for me on CS6 (copied from CS5)

http://dl.dropbox.com/u/62166185/Hsbhsl.8bf

For Windows 7, goes in
C:\Program Files\Adobe\Adobe Photoshop CS6 (64 Bit)\Required\Plug-Ins\Filters

[santoro80]

I have to admit I have 32bit Windows 7 :-( But I will try it, thanks.

[julianmarsalis]

http://www.youtube.com/watch?v=oBK83DZpdEQ

http://www.youtube.com/redirect?q=ht...AxMzM4OTE3NjAx

[santoro80]

Thats pretty crazy