HSV to RGB

[DanRambel]

Has anyone in here used the HSV and or HSI color models? What drives me crazy, is why is there so many different color models? RGB seems to handle them all. I suppose the other models offer more in terms of visually editing, but maybe someone can explain where they came from and why.

[Dijkgraaf]

Have a look at [en.wikipedia.org ] it does a nice job of explaining HSV and why sometimes it is a better model to use.
Hopefully I'm allowed to post that URL as it is I consider it an authorative URL, if not just do a search for "hsv color model".
You also don't want to use RGB when you are defining colours for ink or paint, as they are subtractive colours.

[DanRambel]

Thanks for the efedback. It appears from that read, that the HSV and CMYK color models were designed primparily for print, hence your reply about not using them for print. Adding the blackness level "K" in CMYK sounds like an interesting approach to color. I suppose on print it is more necessary, since different papers absorb ink and reflect in differently.

Thanks for the handy link

Dan

[Dijkgraaf]

You need the K, black, because when you have the maximum values for Cyan Magentra a Yellow, what you get isn't quite a black, as it will have a purplish tinge, hence the need to have a seperate black ink.

[DanRambel]

Yeah right, like when my ink jet runs out of black ink.. it tries to compensate and it does look purplish, you're right there.

Thanks again