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henrik
01-10-2000, 10:51 AM
Hi, I often use my computer and software like Photoshop when working on oil paintings. I use a digital camera to take a picture of my painting, and then use Photoshop to play around with composition, color and value. This has saved lots of time for me when trying to figure out what I need to do to fix a problem.

Now, my question is... Do you know if anyone have created mappings between oil-color pigments and RGB (or HSV)?

Also, have anyone heard of software to calculate how to mix a certain color. Now I find great help in understanding the nature of a color by looking at its place in the spectrum (look it up i photoshop), but it would be neat to say "show me how to mix this the easiest way".

Phyllis Franklin
01-10-2000, 05:15 PM
I can't answer your question, but I bet Rod Webb can. He has photoshop ( I think ) and is quite good with it. He can be reached at [email protected] or, if you can, come to the chat room around 10:30 ET any night this week and you probably will find Rod answering all kinds of questions about art and art materials. There are other really knowledgeable people there as well, and I know someone can help you. http://www.wetcanvas.com/ubb/smile.gif

kwajaali
01-14-2000, 12:57 AM
I have never heard of creative mappings between oil colors and RGB or HSV or CMYK. This would be most difficult for a number of reasons. First, pigments are not uniform between brands, so each mapping would have to be brand specific.

Furthermore, physical paint pigments are a "subtractive" medium (as is also the case with printers ink). That is, when they are mixed together they get darker, they subtract light. RGB is an "additive" medium. That is, the colors are composed of light itself (NOT physical pigments) and so when they are mixed together they get lighter, closer to white. They "add" light.

There is already considerable hassle involved just in getting your printer and monitor calibrated. That color profile alone is frustratingly difficult. I wonder how feasible it would be to calculate mappings for oils. How much of a market exists as an incentive for someone to do this?

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Keith (http://www.sonic.net/finearts)

henrik
01-15-2000, 12:53 AM
I am aware of the differences of additive vs. subtractive; this is something Photoshop, and Painter handles (Painter especially also with different mediums behaving very naturally).

My idea was not to use this for printing with perfect colors. One way for me to achieve what I want would be to paint the palette using oil and then scan them, from there I can pick up the RGB values. This is just lots of tedious work that I wanted to avoid. Now I take a picture of my painting and pick up colors from there; many times the color I want is not on the painting yet, and I want to select a color that is close to the pigment in oil, but it does not have to be perfect.

The market for this is probably quite small http://www.wetcanvas.com/ubb/frown.gif

Keith Halonen
01-18-2000, 02:02 AM
Well, the market for inexpensive chess playing software programs that can defeat the World Champion was even smaller, and yet today we have Fritz6 on CD, which not only defeated Kasparov, but also defeated the IBM supercomputer that defeated Kasparov. Fritz costs $49 US.

So, given that there are as many artists in the world as there are chess players, there may yet be hope.

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Keith (http://www.sonic.net/finearts/index.html)

kemshmi
01-18-2000, 11:47 AM
go into a microsoft program, click on the help , then free downloads..takes you to ms frr stuff page..there is a pantone chart for use with many ms programs..maybe if you keep both windows open while working..seems you are trying to match color exactly on the comp. there is also a way to select a color from within your picture you are working on, click on it and you can use it..

hope this helps

henrik
01-19-2000, 12:42 AM
Yeah, that helps, now I need to get resonable Pantone numbers for oil colors. Anyone heard of that?

Gisela
01-19-2000, 09:58 PM
Henrik,
I haven't seen anything like that for the computer, but sometime last year I picked up something called 'Color Mixing Recipe Cards for Oils and Acrylics'. It's put together by Willaim Powell and published by Walter Foster. It might be of some use to you.
Gisela


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http://www.artistnation.com/members/paris/gisela

kemshmi
01-29-2000, 07:55 PM
you might try this http://www.wetcanvas.com/ubb/smile.gif http://www.mauigateway.com/~donjusko/art7.htm ..or this! http://www.mauigateway.com/~donjusko/tubecolors.htm
http://www.wetcanvas.com/ubb/smile.gif http://www.wetcanvas.com/ubb/smile.gif http://www.wetcanvas.com/ubb/smile.gif http://www.wetcanvas.com/ubb/smile.gif http://www.wetcanvas.com/ubb/smile.gif
{thats a rating of 5 smileys}
kemshmi

[This message has been edited by kemshmi (edited January 29, 2000).]

henrik
01-30-2000, 04:03 AM
Kemshmi
I don't think I could have hoped for more. Wonderful!
Thanks!
http://www.wetcanvas.com/ubb/smile.gif http://www.wetcanvas.com/ubb/smile.gif http://www.wetcanvas.com/ubb/smile.gif http://www.wetcanvas.com/ubb/smile.gif http://www.wetcanvas.com/ubb/smile.gif