opentoko.org

TOKO workshop – image transformations in physics and programming
On Friday Januari 30th there will be another Free OpenToko Workshop.

Toko nr. 11 will deal with image bending. With simple mathematical fuctions, you can make an image or movie change shape. It will cover solid geometry, lensformula’s and -calculation, application in image manipulation and lens like transformation of images. In the morning the math and physics behind image transformation will be explained followed by hands-on workshop image transformation with OpenFrameworks.

The TOKO workshops are about technical topics in the field of art, design and technology. Get inspiration or technical help from all the participants for your own creative projects. For each workshop speakers are invited to share their knowledge and experiences.

Program
10:00 Joris Slob introduces the algebra we will need to make transformations.
11:30 Michiel Cohen Jehoram will cover lenses and optics.
13:00 Theodore Watson introduces OpenFrameworks and gives explanation and examples of image manipulation in OpenFrameworks.
14:30 Loren Roosendaal will use OpenFrameworks to give some more specific examples of image transformations.
16:00 Try out the things you learned and get help from all participants.

Example questions
This toko could answer questions like:
* How do you write your own keystone function?
* How do you get photobooth like effects?
* How do you make two projectors project a seamless image together?
* How do you make a text follow a path?
* How do you make different kinds of gradients?
* How do you enlarge an image without loss of quality?
* How do you show images non-flat surfaces?
* How do you stretch an ellipse to a rectangle?
* How do you fold a 2D image of a rendered sphere back onto the sphere?
* What is the procedure to get from a calibration image to a formula to code?
* etc…

Bio’s of the speakers
Joris Slob
Joris Slob studied Physics and Media Technology at Leiden University. He has a keen interest in programming and has worked as a web-programmer before becoming a scientific programmer in the BioInformatics group. His now is involved in the developement of a large scientific image database.

Michiel Cohen Jehoram

Michiel Cohen Jehoram studied technial physics. He now designs electronics for art- and theatre porjects.

Theodore Watson
Theodore Watson is an artist, designer and experimenter whose work is born out of the curiosity and excitement of designing experiences that come alive and invite people to play. Theodore’s work ranges from creating new tools for artistic expression, experimental musical systems, to immersive, interactive environments with full-body interaction. His recent work includes the Graffiti Research Lab’s Laser Tag, laser graffiti system and Funky Forest, an immersive interactive ecosystem for young children. Theodore works together with Zachary Lieberman on openFrameworks, which is an open source library for writing creative code in C++.

Loren Roosendaal
Loren Roosendaal has a background in 3D game development and studied Media Technology. Loren is now working as 3D consultant for major companies.

OpenFrameworks
openFrameworks is a free application framework designed for “creative coding”. OpenFrameworks is written in C++ and runs on Windows, Mac OS X, and Linux. It is developed and maintained by Zachary Lieberman and Theo Watson. Its emphasis on “creative” uses draws parallels to Processing as both projects present a simplified interface to powerful libraries for media, hardware and communication. openFrameworks’s main difference from Processing is that it is written in C++ not Java and so inherits the performance benefits of a compiled programming language. Users will find many similarities between the two libraries.

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When: 30-1-2009 @ 10:00
Where: Spullenmannen, Kleine Koppel 40, Amersfoort (routedescription: http://www.spullenmannen.nl/media/route_en.pdf
More info: http://dewar.nl/toko/ or call Rick @ 06 2851 6908

Subscribe: Email to toko@dewar.nl to subscribe for this toko workshop or fill in the form below

Notes
*http://local.wasp.uwa.edu.au/~pbourke/miscellaneous/warpplayer/
*http://dem.ocracy.org/libero/photobooth/
*GeoGebra open source tool for constructions with geometry
Theo’s links
*Laser Tag code and how to
*shader warping example in OF
*gl shader /
multmatrix warping discussion on the of forum
*multmatrix warping code
*FBO OF Example Xcode Mac
*FBO OF Example CodeBlocks Windows
Loren’s presentation
{{:presentation-loren2.zip|Loren Roosendaal – Beyond transformations presentation for toko11}}

Danielle’s Processing edge blur filter
Zoals beloofd hierbij twee versies van de code voor het vervagen van randen. Waarschijnlijk zou het effect groter zijn als we naar meerder pixels zouden kijken maar daar zijn we niet aan toe gekomen. Te meer omdat de code die we als basis hebben genomen (http://www.processing.org/learning/topics/blur.html) niet generiek is en uitgaat van één pixel. Dus mocht iemand zin hebben om hier zijn tanden in te zetten, ik hou me van harte aanbevolen :D

{{:danielle-roberts-processing_soft_edge.zip}}

More links
* Aviary Peacock Visual Laboratory – Drag, drop, and connect generators, effects, resources, and controllers.
* Seam Carving