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 Post subject: Re: Op-art
PostPosted: Tue Mar 29, 2011 3:48 pm  (#21) 
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That worked. Thank you. I've had that script for awhile. I don't remember when I used it before.

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 Post subject: Re: Op-art
PostPosted: Tue Mar 29, 2011 4:12 pm  (#22) 
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That is a interesting kind of pattern

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 Post subject: Re: Op-art
PostPosted: Tue Mar 29, 2011 4:12 pm  (#23) 
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ofnuts wrote:
Very similar results to my technique. Do you apply a vertical blur before the threshold?


The technique implements this one:
http://gimpstuff.org/content/show.php/d ... tent=81817

-Rob A>

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 Post subject: Re: Op-art
PostPosted: Tue Mar 29, 2011 6:38 pm  (#24) 
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So, my technique is somewhat different:

Make a 80% grid in one layer (for instance 20 pixels, 16pixels black)
Make a 20% grid in the layer below (20px/4px) center on the "thick" one.
Make a third layer with the image, convert to monochrome, blur it by the size of the grid (20px), an invert the colors.
Make sure that this layer is the only visible and duplicate one of the color channels (they are all the same)
Hide that layer (you can even discard it at that point), make the two grids visible
Add a layer mask to the "thick" layer, and initialize it to the duplicated channel.
Play with brightness/contrast on the layer mask until the images shows up to your liking
Apply the mask
Add white (or whatever) layer below grids
Merge these three layers
Blur vertically by about a quarter of the grid step
Apply threshold.

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 Post subject: Re: Op-art
PostPosted: Tue Mar 29, 2011 9:16 pm  (#25) 
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PhotoComix wrote:
That is a interesting kind of pattern
I saved the pattern with the name, Rob A Dots. I don't know where I got it but I know I used it for something we were doing over in GTalk.

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 Post subject: Re: Op-art
PostPosted: Tue Mar 29, 2011 11:55 pm  (#26) 
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This Op-art is giving me some pretty good ideas!

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 12:09 am  (#27) 
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That was Rob A's version of a hedcut pattern we used to follow his Registry formula:

http://registry.gimp.org/node/10774

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 12:36 am  (#28) 
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Oregonian wrote:
PhotoComix wrote:
That is a interesting kind of pattern
I saved the pattern with the name, Rob A Dots. I don't know where I got it but I know I used it for something we were doing over in GTalk.

[ Image ]
mahvin wrote:
That was Rob A's version of a hedcut pattern we used to follow his Registry formula:

http://registry.gimp.org/node/10774


Oh yes now i remember...i even did a lot of "derivative pattern" from that...

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 1:03 am  (#29) 
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Hy Oregonian & Mahvin

From link to link i traced part of what we did with that pattern...quite cool
http://www.gimptalk.com/index.php?showtopic=44529

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 11:02 am  (#30) 
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I grabbed the pattern thank you all. :)

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 11:22 am  (#31) 
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I am going to upload 50 2048x2048 hi res optical pattern

not sure of the possible use most are seamless but for the size maybe will be more reasonable crop then tile :roll:
well they look fine even at 30% or a bit less...

now i must find the pw of my forgotten flickr account...

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 11:41 am  (#32) 
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PhotoComix wrote:
now i must find the pw of my forgotten flickr account...


Or set up a new one at maj.com ;)

-Rob A>

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 12:13 pm  (#33) 
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RobA wrote:

Or set up a new one at maj.com ;)
-Rob A>


ah tyhat was the link i was looking for thank RobA
I will try to do both on flickr i have a amazing quantiity of images under "photocomix_mandala", even quality is no bad only problem is that everything is mixed in the most chaotic way...

here a random example from my last pattern (accepted by miracle , even if coverted to jpg is over 2.5 MB...)
Attachment:
pattern1_000002.jpg
pattern1_000002.jpg [ 2.66 MiB | Viewed 1272 times ]


OOOPSS not one of the best but upload was so slow that i am not goung to replace it

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 2:32 pm  (#34) 
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Woah that is really cool looking PC

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 2:44 pm  (#35) 
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i have better but i prefer limit such huge attachment, so i will upload and post the link

but i can't resist to show another one..

Attachment:
pattern1_000003.jpg
pattern1_000003.jpg [ 2.99 MiB | Viewed 1268 times ]

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 Post subject: Re: Op-art
PostPosted: Wed Mar 30, 2011 2:50 pm  (#36) 
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I really like that :D
Is it a filter or what is this effect from?

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