Photoshop and Elements > Photoshop LAB Color Book

color spaces

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Jean Pierre:
Hi,

I am reading at the pace of a snail Professional Photoshop 5.

On page 17, he talks about channels and colour spaces.

"The cyan would have to be very light has cyan kills the desired red
Figures 1.5F and 1.5H are the only ones with light flowers, so one must be the red and the other
cyan."

Is to say that in cmyk the channels value represent the color values and that in rgb the represent the inverse of the color value.
In rgb if the white is [dark] red while in cmyk a white magenta would be a pale magenta.

curvemeister:
Yes, that's exactly right.  Later on in the same book, Dan makes this more clear.  I think of is as black taking away the shadows.  From the remaining image, cyan is red, yellow is blue, and magenta is green.  If there is no K channel, then the values are exactly equal.

Jean Pierre:

--- Quote from: j2e4a8n on September 18, 2008, 07:05:02 AM ---In rgb if the white is [dark] red while in cmyk a white magenta would be a pale magenta.

--- End quote ---


Hi Jean

Do you mean that a dark magenta  in RGB  would equal a pale magenta in CMYK?

The other me.

Jean Pierre:
Yes, this exactly what I mean.

Jean Pierre:

--- Quote from: curvemeister on September 19, 2008, 10:27:13 AM ---Later on in the same book, Dan makes this more clear.  I think of is as black taking away the shadows.  From the remaining image, cyan is red, yellow is blue, and magenta is green.  If there is no K channel, then the values are exactly equal.

--- End quote ---
Mike is right.


You are wrong Jean me. They both about the same value .  .   .  ?!!!???


The other me.

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