Oh dear, I've just succeeded in disturbing myself quite effectively by
downloading something that converts RGB to CMYK, except it doesn't !!!!!!
ColourUtility
http://www.sqonk.com.au/
It converts something called RGB(A) (which has 4 values seemingly
bearing little
relation to 3-value RGB) to CMYK.
Randall Reetz wrote:
Trying to do something isnt always the same as doing that something. Success
remains elusive... But i am getting closer. Trying to cut every available
corner along the way (isnt that how evolution works). The human eye isnt
perfect... But we get by. Color space is confusing. Are two and three color
combinations representable in HSV color space? I dont see how. H seems to be
a single point along a pure wave length spectrum. No? I had better read up.
-----Original Message-----
From: "Richmond Mathewson" <[email protected]>
To: "How to use Revolution" <[email protected]>
Sent: 7/5/2009 2:32 PM
Subject: Re: Convert RGB to HSV
Well, you are either way ahead of me, or way "out there"; either way
I won't pretend to understand.
Suffice it to say, my wee stack "cuts the mustard" re converting RGB to
HSV and HSL values.
Randall Reetz wrote:
The reason it matters to me has nothing to do with printing. I am writing AI
and part of this needs to learn how to recognize objects (semantically) from
photos and video. The starter functions i am handing to this self learning
pattern engine are ways of converting bitmaps into vector objects. To swim the
math of a pixel grid and pull objects out involves knowing where a region of
color is person and where it ain't. That means knowing that a darker part of
an arm is still the arm. That means knowing the difference between hue delta
and brightness delta. Of course this gets harry when the color of the lighting
varies accross an image. But i can parse for and adjust for that. RGB vals
don't in them selves carry the data my object parser needs to determine where
an arm ends and where it doesnt. Actually, i dont need seporate S and V
values... just Hue as differenciated from Brightness.
-----Original Message-----
From: "Richmond Mathewson" <[email protected]>
To: "How to use Revolution" <[email protected]>
Sent: 7/5/2009 12:33 PM
Subject: Re: Convert RGB to HSV
The Wikipedia article I referenced in an earlier posting in this thread
is really quite comprehensive, including 3-d diagrams of how this
is conceptualised.
I generally find the algorithms on Wikipedia are very useful in
this sort of case, as, am not going to get out my slide-rule and
work out the whole jingbang for myself - this life being too short.
Frankly, as a simple type of chap, who only prints out coloured
stuff rarely, I am perfectly happy with RGB.
I just got piqued when somebody esle was writing about HSV (err, HSB ???)
and so on, and thought "I wonder if I can do that?" as, honestly, had a very
unstimulating few days (went to a funeral, helped in Bulgaria's
parliamentary
elections . . . need I say more) and felt a need to stretch the mind a
spot_______________________________________________
use-revolution mailing list
[email protected]
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-revolution
_______________________________________________
use-revolution mailing list
[email protected]
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-revolution
_______________________________________________
use-revolution mailing list
[email protected]
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-revolution
_______________________________________________
use-revolution mailing list
[email protected]
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-revolution
