Droste (Mathmap) With a G'MIC twist.

mahvin · **Joined:** Oct 06, 2010 **Posts:** 4050

This is our Milky Way galaxy converted via the Droste technique using Mathmap (from reading the Flickr posts I appear to be some 4 years behind the times). I duplicated the original image and inverted the image layers using Soft Light mode, then ran PC's Graphic Boost Dark on the flattened image.

I was originally seeking a way to make some "unique" fractal designs for screen printing, which I would then apply to t-shirts. Droste appears to be an interesting way to create fractals.

The original image:

PhotoMaster · **Posted:** Fri Jan 21, 2011 8:36 am **(#2)**

Now this is a phenominal work! Simply brilliant!

Oregonian · **Posted:** Fri Jan 21, 2011 10:09 am **(#3)**

That is so surreal. I love it. Nice work, mahvin.

lylejk · **Joined:** Sep 24, 2010 **Posts:** 12831

I must have what you're smokin' Mahvin. Like it too.

Rod · **Joined:** May 16, 2010 **Posts:** 16158

LOL @ Lyle - That is really awesome looking Mahvin, great work!

gerard82 · **Posted:** Fri Jan 21, 2011 6:03 pm **(#6)**

I wonder if anyone here knows where the term droste came from.
Being Dutch I am familiar with this picture on Droste cocoa.
On the plate is a box with the same picture.
Thus this is repeated endlessly.
Gerard.

mahvin · **Joined:** Oct 06, 2010 **Posts:** 4050

The original layer of my above image went into repeated sequences, but the technique was all too common with anything you threw at it. It looked nice, but it was just more of the same pattern repeated to infinity. I decided to toss the droste filter's pole settings and fractal generator into high gear and it added some punch-drunk "pizazz" into the scene to spread the cheer around. Duplicating the layer and reversing the effect (then combining the two) made for some real eye-popping imagery. The only problem then was, with so many settings to play with, picking which setting/imagery you liked best. You could literally waste hours trying to find that "perfect storm".

I followed Josh Sommers tutorial found here: http://www.flickr.com/photos/joshsommer ... 4/sizes/o/

I strongly recommend those who haven't tried this, to give it a shot.

Rod · **Joined:** May 16, 2010 **Posts:** 16158

I used the same kind of effect with an old version of my website.
The index page had a monitor on it that showed the index page with a monitor on it...and so on and so on...it was pretty cool.

droste effects never get old. =)

I like mirror droste effects the best.

mahvin · **Joined:** Oct 06, 2010 **Posts:** 4050

I am finally getting somewhere with MathMap, using the composer with Droste and Mercator filters. I did have to jump into G'MIC to use mirror array, (is there anything similar in MathMap? - I didn't see it) Anyway, I'm liking the fractal generations I get using this combination. As soon as I can figure out the best 4 color combination for screen printing, I will test some patterns out. (I'll probably go with gray monochrome colors on black cotton).

Bob63 · **Posted:** Sun Jan 23, 2011 9:44 am **(#10)**

Those are very cool, mahvin!

Gee, I sat in front of my computer all day Friday, and you went and took a picture of the galaxy... :rofl

PhotoComix · **Joined:** Apr 12, 2010 **Posts:** 5870

mahvin wrote:

I did have to jump into G'MIC to use mirror array, (is there anything similar in MathMap? - I didn't see it

Wow that is cool..
Mathmap has something ... very vaguely similar to mirrored array

It is on the main tab are the " edges" (or "contour" ? i can't check by now ) options for X and Y
to choise how will be filled empty spaces
suppose you want map a image to a sphere, images are always rectangular so how to fill what outside the sphere:
color - with transparency or a solid color
mirror- with a mirrored image
warp - by warping

in some case the effect of "mirror" could be similar to mirrored array, but some filters as Droste really mixed up what inside and ouside the edges
so options as mirror and warp may give quite weird and surprising results

RobA · **Joined:** Jul 14, 2010 **Posts:** 697

mahvin wrote:

I am finally getting somewhere with MathMap, using the composer with Droste and Mercator filters. I did have to jump into G'MIC to use mirror array, (is there anything similar in MathMap? - I didn't see it)

Not sure how mirror array works.
Here is a mod of the tile mm script to be a mirror tile:

Code: Select all

stretched filter mirrortile (stretched image in, int n: 1-10 (3))
  if (floor(((x+1)*n)/W%2-1)) then
    newx = ((x+1)*n)%2-1;
  else
    newx = ((W-x+1)*n)%2-1;
  end;
  if (floor(((y+1)*n)/H%2-1)) then
    newy = ((y+1)*n)%2-1;
  else
    newy = ((H-y+1)*n)%2-1;
  end;
  in(xy:[newx,newy])
end

Hope that does what you want.

-Rob A>

PhotoMaster · **Posted:** Mon Jan 31, 2011 4:23 pm **(#13)**

The mathmap mirrortiles code works awesomely! Thank you!!

PhotoComix · **Joined:** Apr 12, 2010 **Posts:** 5870

thank Rob !

mahvin · **Joined:** Oct 06, 2010 **Posts:** 4050

Thanks, Rob!

pranav · **Joined:** Aug 13, 2010 **Posts:** 23

Good works Mahvin!

OT: there is a great open source fractal renderer for Windows called Apophysis 7x (originally Apophysis that is kinda discontinued). Here are links to download it and see what it can do.

http://apophysis.xyrus-worx.net/
http://ivankorsario.deviantart.com/gallery/26950606/

PhotoMaster · **Posted:** Tue Feb 01, 2011 12:30 am **(#17)**

The Apophysis site behaves a little weird and the DA gallery is returning a 404 error.