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HSB/HSL reading in info palette using CS6

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  #11  
Old 07-12-2012, 10:59 AM
andrewrodney's Avatar
andrewrodney andrewrodney is offline
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Re: HSB/HSL reading in info palette using CS6

Because saturation is often affected by (fill in the terms, Brightness, Lightness).

For example, there are some who suggest that using curves in RGB affects hue, so you should do this in Lab. Photoshop from day one was programmed (with more work involved) to do this because most of the time, it just looks better. See: http://www.luminous-landscape.com/essays/Curves.shtml
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Old 07-12-2012, 11:00 AM
jhr jhr is offline
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Re: HSB/HSL reading in info palette using CS6

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Originally Posted by andrewrodney View Post
Seems doable visually or with any set of values (they should match).
I probably should have pointed out that I aim to match one part of an image with another (lets say for conversation sake a football hat with another football hat). Not sure if that got lost in translation aswell
It is absolutely doable with a number of different methods (using Lab for example) and visually. However, I would find it useful to get a info read of just the saturation for example and, in theory, HSB would be great for that. I suppose the Hue reading from Lab's A and B channels could substitute the H reading from HSB?
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Old 07-12-2012, 11:11 AM
jhr jhr is offline
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Re: HSB/HSL reading in info palette using CS6

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Originally Posted by andrewrodney View Post
Because saturation is often affected by (fill in the terms, Brightness, Lightness).
EDITED: Ah! That would explain it! I found some pretty interesting information regarding this:

HSB and HSL, which was created by George Joblove in 1978, are the most widely used hue-based models for color selection in graphics applications. For example, in Photoshop, HSB is used to select a color, and HSL is used to change colors in an image. HSB and HSL are mathematical subsets of the CIE Lab model and are not based on actual human perception of colors as is CIE Lab. Although not shown in this definition, HSB and HSL are often expressed geometrically as an inverted cone and double cone: H is the angle around the axis; S measures from the axis outward and B/L from top to bottom.

Although both models are based on the hue, saturation and brightness/lightness triplet, hue (H) is similar, but saturation (S) and brightness/lightness (B/L) are not. One of the main differences is that in HSB, the B dimension includes nothing about the whiteness of the color, only its blackness, whereas in HSL, the L axis carries both white and black information.


More on it here, here and here.

Last edited by jhr; 07-12-2012 at 12:43 PM.
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