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173 pencils

Creating a Colour Blind Test type image

harrison (173 pencils) | Mon, 2006-09-04 09:58
Member's Forum

So,

I'm trying to recreate a colour blindness test type design. I'm not really looking to recreate the colours/effect of the test, but rather the design of it - namely, the dot size/frequency distribution.

here's an example of one:

http://upload.wikimedia.org/wikipedia/commons/9/98/Ishihara_2.svg

I'm essentially trying to recreate the dot pattern, and then colour them appropriately to form an image.

I assume Illustrator would be most approrpiate, however I'm not quite sure the best way to go about creating the image, short of making a whole bunch of dots in different sizes and arranging them manually.

I don't want to just resize the svg from wikipedia, as I would like it to cover a larger area, but keep the dot sizes reasonably small.

Any ideas?

—

andrew harrison
http://andrew.harrison.org

Commenting on this Forum topic is closed.

rat.planet's picture
1 pencil
rat.planet | Tue, 2006-09-05 06:39

thanks..

Flub-Dub's picture
Flub-Dub (not verified) | Fri, 2006-09-08 05:17

mmm.

illustrator
symbol sprayer tool (shift+s) would do some of the trick.
draw a circle, drag it to the symbols palette.
select symbol sprayer tool then make sure you have the circle selected in the palette. now you can paint lots of circles easily.

after you have a bunch, select the bunch, and choose the symbol sizer tool (from the flyout menu of the symbol sprayer tool). now you can vary their size.
and to make the "hidden" symbol should not be hard.
you have only one problem. in the example the dots should not intersect each other. im not so good with the sprayer options in illustrator. but it should be doable.

anyways in freehand you have the graphic hose tool (looks like a hose tip with things coming out of it) which has settings regarding random resize and spacing between objects. in freehand you should be able to do it in a single move.
then export as PDF and voila, go back in illustrator.

either way, thats all i can say. if you dig deeper into the matter, pls lemme know how you fixed the collision aspect in illustrator.

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always outnumbered, never outgunned

Flub-Dub's picture
Flub-Dub (not verified) | Fri, 2006-09-08 05:18

and, of course, show us the final result

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always outnumbered, never outgunned

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