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The Droste Effect
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Thanks Josh! Welcome to the group.
Here is Josh' set. pretty cool.
www.flickr.com/photos/joshsommers/sets/72157594405604955/
Awesome! Thanks for posting.
Josh's tutorial involves using GIMP and a plugin mathmap.
Using math in photography.....Cool!
I just followed the instructions and it works like a charm.
Now, I just have to figure out how to create a pleasing image.
Edit: Josh's tutorial involves using an older version of GIMP and mathmap. There is a newer version of GIMP and mathmap for windows and the install is much easier. Just download GIMP and install it. And download mathmap and install it. The lastest version of the droste effect code is here.
www.flickr.com/groups/escherdroste/discuss/72157601071820...
More on the Droste effect:
www.josleys.com/show_gallery.php?galid=291
en.wikipedia.org/wiki/Droste_effect
www.josleys.com/articles/printgallery.htm
www.flickr.com/groups/escherdroste/
escherdroste.math.leidenuniv.nl/
Mathmap link: www.complang.tuwien.ac.at/schani/mathmap/
Below are Josh's notes on the code. They will only interest you if you try the software. So, dont read on until you do. Otherwise, you will be confused and your head with spin a 360 degree turn.
Erase a region in the center of the image and then adjust r1 (or Inner Radius if you are using version 10 of the formula) so that the image fits inside the cutout.
Every step of the tutorial has to be followed exactly in order to get the desired results. Cropping the image is important. Position the transparent region in the center of the image and check the innertransparency and tilebasedontransparency options.
Your cutout region should be in the center of the image. This is important, especially if you are using version 4 of the formula which has no center offset variables. Otherwise, use center offsets to produce the image using version 10.
2) Your image should match the proportions of the cutout image. Look at step 1.4 of the tutorial. Your image should be the same shape/ratio as your transparent region and that the transparent region is at the center of the image.
3) You have either save your image with transparency, or you have to select the tile based on transparency and inner transparency options. Look at steps 4.2 and 4.3 in the tutorial.
Version 10 has the ability to offset the spiral so it is not as important that the transparent region be in the middle of the image, nor is it as important that the transparent region match the ratio of the image because you have the ability to offset the spiral on the x and y axis. Also in version 10, inner transparency is the default, so there is no need to check any options to get it to work from the beginning.
There is rarely any reason to change the outer radius parameter (r2).
The inner and outer radii parameters form a ratio, so you should be able to form any ratio just by changing the r1 parameter. Think of it as r1/r2. Imagine r2 is 100 and r1 is 50, your ratio would then be .5. you could also get a ratio of .5 with the r2=50 and r1=25. I've included both variables in the formula, but I never use anything other than 100 for outer radius (r2).
Originally posted 49 months ago.
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garreyf (a group admin) edited this topic 45 months ago.
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Josh Sommers has recently posted an updated tutorial for the Droste effect.
www.flickr.com/groups/escherdroste/discuss/72157606654965...
Originally posted 45 months ago.
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garreyf (a group admin) edited this topic 45 months ago.
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Heres my attempt at this.
Posted 45 months ago.
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For those of you interested in the Droste effect and have cs4, you will be very happy.
The Droste people have teamed up and have taken advantage of photoshops new pixelblender technology that is new in cs4.
There is now a photoshop plugin for the droste effect.
For those of you who have used Gimp to do this previously, you know how painfully slow it is to experiment with the Droste effect.
No more pain. Download pixelblender from adobe and then download the droste plugin.
www.subblue.com/projects/droste
labs.adobe.com/downloads/pixelbender.html
www.webmonkey.com/blog/New_Pixel_Bender_Plugin_Expands_Ph...
Josh Sommers (the master of all this..see above)..has just posted a new image using this plugin.
He informed me of this new technology. This pixelblender tool will open the door to alot of new plugins. Im pretty sure it takes advantage of the new powerful graphics cards that are shipping in todays computers.
For those of you who dont care about the droste effect, I would try the pixelblender plugin. It comes with a bunch of free filters that you can play with. Remember, this only works in cs4 (photoshop and after effects)
Originally posted 40 months ago.
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garreyf (a group admin) edited this topic 40 months ago.
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Pixelbender utilizes the GPU (Graphic Processor Unit) on your video card to process images. Mathmap processes linearly; it applies the whole formula to one pixel at a time. By shifting the workload to the GPU PixelBender is able to process thousands of pixels simultaneously. This has obvious benefits to speed, enabling PixelBender to process complicated scripts like the droste nearly instantaneously, but it also has a few drawbacks. The main strength is also the main weakness. Beacause PixelBEnder processes each pixel independantly and has no idea in which order it is processing the pixels, there is no way to get at certain information, such as the color result of the previous calculated pixel, or the overall image size. But aside from these minor drawbacks PixelBender has loads of promise.
The most impressive aspect to PixelBender though is that now we can apply the droste effect to video, in real time! The speed boost in PS is great- but the real prize here is the After Effects integration of PixelBender.
Posted 40 months ago.
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Great. Thanks Josh! Im looking forward to more Droste videos.
Posted 40 months ago.
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Iphone app: idroste
Free download at itunes.
Posted 23 months ago.
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www.photospiralysis.com/
Photospiralysis: Free download to create spiral-type images.
Posted 23 months ago.
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I have just installed pixel bender and the droste, but just cannot seem to get the effect I am looking for, ( frame in frame ) all i get is Large swirls in the middle of my page, no really visible full photo,, what am I doing wrong, on the point of pulling my hair out, this is the tutorial I am following,
www.digital-photography-school.com/droste-%E2%80%98frame-...
I even changed the size of my photo to match her's and still got a swirl,
any help much appreciated
suzy
Originally posted 19 months ago.
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bindiblue2002 edited this topic 19 months ago.
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I have just noticed in my droste folder the name of the file says Dial up phonebook is this correct or do I have a rouge filter, really cannot get this to show my full photo from the beginning,
Posted 19 months ago.
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Hi..Im not exactly sure. That sounds a little odd.
I would definitely post your question in the flickr group dedicated to this.They may even have the latest pixel bender droste. Josh is pretty active there. I remember doing this, and it can be a little frustrating.
www.flickr.com/groups/escherdroste/
There is a new release according to the latest post there.
Originally posted 19 months ago.
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garreyf (a group admin) edited this topic 19 months ago.
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Thanks for that reply Garreyf
Posted 19 months ago.
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