Jorge Cardoso's Blog - Processing

Neurosky Mindset Processing Library

nospam@example.com (Jorge Cardoso) — Sat, 20 Nov 2010 17:59:33 -0500

The Interactive Art group at CITAR, recently bought a Neurosky Mindset device (it's a headset that reads the brainwave activity) and, because there were no available Processing libraries to fetch the brainwave data I decided to implement my own.

So... here's the MindsetProcessing library.

Continue reading "Neurosky Mindset Processing Library"

Facebook OAuth class for Processing

nospam@example.com (Jorge Cardoso) — Fri, 29 Oct 2010 11:59:36 -0400

This class only takes care of getting the access token, the rest is up to you. It uses the WebBrowser component from the Lobo Browser library to display the authentication page (I tested it on Windows and Mac OS X). Here you find an example Processing project with all the components.

I implemented this as part of an example for the Multimedia Programming course of the School of Arts.

Continue reading "Facebook OAuth class for Processing"

Cursos Processing em Portugal

nospam@example.com (Jorge Cardoso) — Mon, 15 Dec 2008 12:50:40 -0500

Tenho sido contactado várias vezes sobre a existência de cursos sobre Processing. Aqui fica a lista que eu conheço... Se souberem de mais ou quiserem corrigir alguma informação estejam à vontade.

Continue reading "Cursos Processing em Portugal"

Face Detection and Funny Eyes

nospam@example.com (Jorge Cardoso) — Mon, 31 Mar 2008 18:41:16 -0400

I couldn't resist to play a bit more with the Face Detection library for Processing... see my previous post.

This time the eyes follow the mouse :)

Face Detection With a Smiley

nospam@example.com (Jorge Cardoso) — Wed, 26 Mar 2008 15:49:06 -0400

After seeing Bryan Chung's face detection Processing library for windows I decided to have a go with it.

First, I had trouble running the original example because of this error (see these comments on Bryan Chung's blog):

Exception in thread “Thread-2″ java.lang.UnsatisfiedLinkError: D:\processing-0135-expert\libraries\pFaceDetect\library\PFaceDetect.dll: This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at pFaceDetect.PFaceDetect.(PFaceDetect.java:10)

I ended up having to recompile the C++ code and replacing the original dll with my own, but Bryan's tested on several computers and he had no problems, so this was probably something wrong with my setup. Here's my pFaceDetect.dll, if yours doesn't work either.

I adapted slightly the original example so that it would track a single face (but detects all faces in the image) and replace it with a smiley.

In the video you can note some of the library's limitations (actually, OpenCV's haarcascade tracking limitations): sometimes it finds faces where there are none. Sometimes it doesn't find a face where there is one.

You can't see this in the video, but the maximum framerate I got in my laptop was 10 fps. This is low, but it doesn't stop you from doing something cool with this library, and there are probably ways to make it faster.

PS: I was chewing gum in the video...

Advanced Background Subtraction - Source Code

nospam@example.com (Jorge Cardoso) — Tue, 08 Jan 2008 15:10:45 -0500

This code is still very messy, but I've decided to make public anyway..

This is the code for the last example.

edit: You need Java 1.5 installed to run the examples. Install the JDK 1.5, or higher, and install Processing (without Java).

Advanced Background Subtraction Demo - Shillouette Downsampling and Zeno's movement

nospam@example.com (Jorge Cardoso) — Tue, 08 Jan 2008 14:05:16 -0500

Another background subtraction demo. This time the silhouette is downsampled and continuously moved towards the current one.

Advanced Background Subtraction Demo - Shillouette Replay

nospam@example.com (Jorge Cardoso) — Sun, 06 Jan 2008 15:18:03 -0500

Another video that demonstrates the use of background subtraction and silhouette extraction.

This time, the silhouettes are saved and continuously replayed.

Advanced Background Subtraction Demo - Shillouette Collisions

nospam@example.com (Jorge Cardoso) — Sun, 06 Jan 2008 10:59:00 -0500

Another video that demonstrates the use of background subtraction and silhouette extraction.

The spikes in the silhouette represent the normal of the silhouette segments, that are used to calculate the reflected angle when balloons touch it.

Advanced Background Subtraction Demo

nospam@example.com (Jorge Cardoso) — Sat, 05 Jan 2008 17:50:53 -0500

I have been working on some examples for my Interactive Video Art course at the School of Arts of the Portuguese Catholic University.

Here's a video of an example that performs background subtraction and silhouette extraction. I'll not post the code because it's still a work in progress...

The video is low quality so you can't see the silhouette lines...

Edit June 2010: A lot of people still ask me for the source for this demo, so here it is. Beware, this is very raw code... you are warned.

Processing Screensavers

nospam@example.com (Jorge Cardoso) — Thu, 04 Oct 2007 17:38:48 -0400

Screensavers are one of those kinds of programs that don't have much purpose (at least the great majority of them) but still can be fun to watch. Even more if you're the one who programmed it.

I'm thinking screensavers could be a motivating factor in my Multimedia Programming course ;), so I decided to create a small program that allows any Processing program to be run as a screensaver.

It uses the Saverbeans SDK so it only works for Windows, Linux and Solaris.

Continue reading "Processing Screensavers"

NXTComm for Processing

nospam@example.com (Jorge Cardoso) — Tue, 24 Jul 2007 11:54:45 -0400

I have just released the first version of the NXTComm library for Processing: http://jorgecardoso.org/processing/NXTComm/

This library allows to control de Lego Mindstorms NXT robotic legos remotely (via Bluetooth).

It has only basic functionality like reading the standard sensors and actuating the motors (without much control), but it might be interesting if you work with Processing and robotics.

The library uses the RXTX java library for serial communication (the NXT must have been previously paired with the computer, there's no discovery function...).

I hope to be able to release the Java library that supports the Processing one, soon... I just need to clean up and document the code better...

CamStudio: Unable to Detect Webcam / Video Source

nospam@example.com (Jorge Cardoso) — Sat, 07 Jul 2007 21:43:36 -0400

I downloaded and installed CamStudio, but for some unknown reason it doesn't detect my webcam when I try to use "video annotations".

So, I decided to create my own video window in Processing.

Continue reading "CamStudio: Unable to Detect Webcam / Video Source"

Workshop sobre Processing e Legos RobÃ³ticos

nospam@example.com (Jorge Cardoso) — Wed, 30 May 2007 11:16:33 -0400

Vou dar um workshop sobre Processing e Legos RobÃ³ticos (Mindstorms NXT) na Escola das Artes da Universidade CatÃ³lica Portuguesa de 23 a 27 de Julho de 2007.

Este workshop destina-se principalmente a alunos do 10Âº ao 12Âº anos, de preferÃªncia com alguma experiÃªncia de programaÃ§Ã£o.

Continue reading "Workshop sobre Processing e Legos RobÃ³ticos"

Dynamic Brush

nospam@example.com (Jorge Cardoso) — Thu, 03 May 2007 18:03:33 -0400

DynamicBrush is a Processing experiment with particles and digital painting. It uses the traer.physics Processing library to model a brush made up of particles connected by springs to the mouse.

You can try it here.