3D Magnetometer mouse in processing


[etgalim] works in Solidworks extensively and wanted a more intuitive way of rotating objects onscreen. To do this, he created a mouse that responds to rotation. He put a 3D compass module inside an old mouse and wired it up to an Arduino. The Arduino then relays the I2C sensor data to the computer. So far, he has a Processing script that uses the mouse to rotate a cube, but eventually he wants to write a Solidworks plugin. It’s a bit shaky, and we think it would be a bit smoother (and cheaper) if he used gyros like the jedipad. Video after the jump.

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Barcode scanner in Processing


Reader [Nikolaus] decided that instead of using an existing image based bar code decoder, he would write his own. Using the Processing language he created a scanner that parsed the black and white pattern when a bar code was centered on the image. His code then parsed that data and compared it with the initializing character to provide a reference. Currently his scanner supports three character sets of the Code 128 encoding, and provided his complete code so that others could add as they see fit. He admits that the code is a bit messy due to the lengthy character tables, but very straight forward.

Remote image processing in JavaScript

[Tom] wrote in to tell us about his JavaScript project for motion detection. It ties together two ideas we’ve talked about recently. The first is doing image processing in-browser using Canvas(), which we’ve seen employed in captcha breaking. The second is offloading heavy processing to browsers, which we saw recently in the MapReduce implementation. [Tom] is using JavaScript to compare consecutive images to determine if there’s any motion. He did this as part of MJPG-Streamer, a program for streaming images from webcams. It can run on very limited hardware, but image processing can be very intensive. Doing the image processing in-browser makes up for this limitation and means that a custom client program doesn’t have to be written. You can find the code here and a PDF about the proof of concept.

Laughing Man in Processing


The Laughing Man is the antagonist from the anime series Ghost in the Shell: Stand Alone Complex. During each of his public appearances in the series he manages to hack all video feeds/cyborg eyes in the vicinity to obscure his face with the logo above.

[Ben Kurtz] had been watching the series recently and realized he could put together a similar effect using Processing. The interesting bit, and what makes this more fun than a simple demo, is that he’s using the OpenCV library. OpenCV is a open source computer vision library. [Ben] uses it to handle the facial recognition in Processing and then apply the image.

It’s only 100 lines and we wonder what other fun tricks could be employed. Here’s a Hack a Day skull you can swap in for the logo.

[thanks dakami]

Processing 1.0

Processing, the open source programming language designed for artists and other creative types, finally went 1.0. Processing inspired numerous outpourings of creativity and beauty, from interactive art installations to sound sculptures. Improvements to Processing include OpenGL anti-aliasing, an extensible Tools menu, and the XML library included by default. You can read up on the changes or download Processing and start playing with it yourself.

[via Create Digital Motion]

Wiimote head tracking in Processing

[Manuel] has been playing around with [Johnny Lee]‘s Wiimote head tracking code. He’s posted a preliminary port outlining the code in the Processing environment. It relies on darwiinremoteOSC so you won’t see this outside of OSX, but it should help you out if you’re trying to do this is in Processing on another platform.

[via Create Digital Motion]

[photo: nicolasnova]

Your New Winter Hat Should Express Your Brain Waves Like a Neon Sign… Just Saying


We’ve seen a few cool hacks for mainstream commercial EEG headsets, but these are all a tad spendy for leisurely play or experimentation. The illumino project by [io] however, has a relatively short and affordable list of materials for creating your own EEG sensor. It’s even built into a beanie that maps your mental status to a colorful LED pompom! Now that winter is around the corner, this project is perfect for those of us who want to try on the mad scientist’s hat and look awesome while we’re wearing it.

How does all the neuro-magic happen? At the heart of [io's] EEG project is a retired Thinkgear ASIC PC board by Neurosky. It comes loaded with fancy algorithms which amplify and process the different types of noise coming from the surface of our brain. A few small electrodes made from sheets of copper and placed in contact with the forehead are responsible for picking up this noise. The bridge between the electrodes and the Thinkgear is an arduino running the illumino project code. For [io's] tutorial, a Tinylilly Arduino is used to mesh with the wearable medium, since all of these parts are concealed in the folded brim of the beanie.


In addition, a neat processing sketch is included which illustrates the alpha, beta, gamma, and other wave types associated with brain activity as a morphing ball of changing size and color. This offers a nice visual sense of what the Neurosky is actually reading.

If all of your hats lack pompoms and you can’t find one out in the ether that comes equipped, fear not… there is even a side tutorial on how to make a proper puff-ball from yarn. Sporting glowing headwear might be a little ostentatious for some of us, but the circuit in this project by itself is a neat point of departure for those who want to poke around at the EEG technology. Details and code can be found on the illumino Instructable.

Thanks Zack, for showing us this neat tutorial!

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