White / Black - Hue? ? ?

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15.05.2009 20:30:00
Came across this statement:
. . . . because the red is closer in hue to the colour black than it is to the colour white.
How could he take? Bullshit or any reason there? !
(question sounds stupid, but it's the last straw, because of which a person can be fired as incompetent)
 

15.05.2009 21:45:00
quote:
:
came across this statement:
. . . . because the red is closer in hue to the colour black than it is to the colour white.
How could he take? Bullshit or any reason there? !

Who is he? And really nonsense, for all shades of gray are obtained at zero saturation and any tone. White and black - is gray with a brightness respectively 100 and 0. In any case, it is different axis.

15.05.2009 21:55:00
If there was no mean distance scale physiological perception ie. E., The sensitivity of the rods and cones.

15.05.2009 22:08:00

Who is he?
Coauthor course on web-design situations, in general, not a bad guy, I did not know it, he wrote and delivered a "harsh criticism", there was still a lot of mistakes. Now he faces failure on all counts


autotranslation with transliteration:
unlikely - closer in hue


15.05.2009 22:47:00
quote:
:
co-author of a course on web-design situations, in general, not a bad guy, I did not know it, he wrote and delivered a "harsh criticism", there was still a lot of mistakes. Now he faces failure on all counts

Sometimes "good guy" and "good writer" - often different people

15.05.2009 22:57:00

Sometimes "good guy" and "good writer" - often different people
You think I do not? of the good guys I then trample, and even, God forbid, awnings rewrite this course, and to me, and so hanging

After a weekend theme grohnu - it seems there is nothing to argue ( or - I do not know, o ! )

15.05.2009 23:15:00

But that said about the White Book and Hue G. Wyszecki & amp; W. S. Stiles Color Science. Concepts and Methods, Quantitative Data and Formulae. Second Edition // John Wiley & amp; Sons Inc. , NY, 2000:

1. 4. 4 Black Surfaces
quote:
There are several materials that absorb most of the incident radiant energy and reflect only a small portion of it. These materials are percieved as black under normal conditions of viewing and have useful applications ...

Table I (6. 1) Basic Terms of Color Perceptions and Their Definitions
quote:
Hue is the attribute of a color perception denoted by blue, green, yellow, red, purple, and so on.

Unique Hues are hues that can not be further described by the use of the hue names other than its own (also referred to as unitary hue ). There are four unique hues, each of which shows no perceptual similarity to any of the others; they are: red, green, yellow, and blue. A light (color stimulus) perceived to be unique red is judged to be neither yellow nor blue. Similarly, unique yellow is neither red nor green; unique green is neither yellow nor blue; and unique blue is neither green nor red. The hueness of a light (color stimulus) can be described as combinations of two unique hues; for example, orange is yellowish-red or reddish-yellow. Sometimes, nonunique hues such as orange are referred to as binary hues .

6. 5. 3 White. Whiteness Formulae
quote:
White is the attribute of a visual sensation according to which a given stimulus appears to be void of any hue and grayness. In this sense, we alse speak of "white" stimuli. The gamut of stimuli that give rise to the perceptio of "whites" or "near-whites" in color space depends markedly on the observing conditions, but is always very small as compared to the whole gamut of color perception.

Overall:
* black - is a surface property "does not reflect anything discernible»
* white - it's such a visual stimulus, the shade of which can not be recognized visual apparatus
* hue - is recognizable (except white) property visual stimulus, which we call the shade (red, orange, yellow, green and so on. d.)
* red - is one of the unitary hues

phrase «red is closer in hue to the colour black than it is to the colour white "with all this weakly compatible - it is hardly possible to apply comparative degree in some respects to something devoid of this feature.
 

15.05.2009 23:25:00

autotranslation with transliteration:
Thank you for your detailed reply , specifically this book I have not, but with this area I am very familiar.
other words, the arguments in favor of the fact that this is nonsense, you can not give more interested on the contrary, may be something I missed all these years I've been
sinful deed thought, what if he is under the black (like a man running quark) meant CMYK "black" or "registration" - even so does not pass! Just wanted to understand what he meant, ask not seem to get longer

16.05.2009 6:45:00
Just done an experiment that, if desired, can be regarded as proof that the red is much closer to black than to white. Assume that the mode "difference" for Photoshop layers produces the very "distance", which is discussed here. Then make a difference with respect to pure red black (get the same pure red) and relatively white (get pure cyan, negative to red). It remains to find out who is lighter, t. E. In a couple got a big difference. If the lighter will be cyan, it means that the red was from white farther than from black. Suppose that adequately reflects the lightness channel brightness of our sample in its expansion in model Lab. Translate both in the Lab and see that bright red cyan by a wide margin (on a scale of RGB is 232 against 140). Subjectively, all too like this. That is the difference between red and black is much less than the difference between red and white.

16.05.2009 19:24:00


pure cyan
C52Y13

never played with the layers in the Lab color and, accordingly, did not know that some of the "modes" do not work (including a Difference), thank you! ! ! A
numbers and in the end get a friend - 129/130 and 228/229, with solid color prevratimas in 2 different colors to yedinichku after avtolevels looks like noise

18.05.2009 12:45:00
If you take the picture with the scale of hue (rainbow) and drive to zero saturation, then get a picture in shades of gray yellow and blue colors go into something closer to white, and red, purple and blue - closer to black. I think people like mean
 

18.05.2009 15:45:00

If you take a picture with the scale of hue (rainbow)

Rainbow called "line spectral locus."


and drive to zero saturation

That something will grayscale. What exactly is dependent on:
a) the method of selecting the line spectral color (constant energy, constant number Fotov per second per unit area, and ravnoyarkostnaya t. N.);
b) the method of « drive to zero saturation ».

In general, from the "correct" editing tool saturation is natural to expect that the "correct" line spectral locus will be converted into a gray discoloration at the line of constant intensity.

you describe the effect rather is a consequence of the imperfection of modern color matmodeley than a fundamental property. I think a colleague described just such an effect.
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White / Black - Hue? ? ?

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