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David Choi
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David Choi

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Latest post: Exploring anamorphic projections using Kinect headtracking.  Using the head location, we can "undo" the skew introduced by perspective.  

The effect is quite striking -- square things appear square, no matter where we are relative to the screen.  

The demo video shows a bit of this effect, where the painting of Mona Lisa appears to be floating in front of us, un-tethered from the monitor.

http://radicade.posterous.com/anamorphic-projections
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David Choi

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Check out my portals!! Finally got this working... head tracking + kinect + projector for real world "Portal" displays:

http://radicade.posterous.com/real-life-portals-using-a-projector-and-a-kin
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David Choi

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If there is anyone who has heard of but hasn't tried Dropbox yet, I'd highly recommend it -- seriously works great. Way better than using a USB stick to sync up files, and being able to remotely access files from my phone has saved me on more than one occasion.

http://www.dropbox.com/ (or use my referral link http://db.tt/Xlcah0EM for 250MB bonus space)
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David Choi

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Really enjoyed the interview with poet Jane Hirschfield on the radio this morning. Hirschfield, on poetry:

"I'm a big believer in recent years in the way that one way that poems make our experience larger is that because so many impossible things happen in them every day...

It's like Lewis Carrol, try to think of six impossible things before breakfast...

Poems think of six impossible things every other line... any metaphor, any simile...

The moon is not a white cat, but you say so in a poem,and the mind expands and lets that happen and starts prowling around in the dark."
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David Choi

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Interesting: studies have shown that despite an initial boost in productivity that comes from crunching, working >60 hour weeks is actually harmful in the long run.
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David Choi

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Thinking about Paul Graham's essay about "holding a program in one's head", and the idea of loading/unloading a complete picture of something, and holding onto it with intense concentration, for long, unbroken stretches of time.

Reminds me somewhat of the scenes within The Social Network, where once a programmer is "jacked-in", headphones on, and in-the-zone, it is understood they are not to be disturbed. There is almost a sacred quality about that space, an implicitly understood sanctity about that very private, very personal ownership of concentration.

I guess I have had moments where I've felt this way -- but more than often the needs and demands of multi-tasking, coupled with an abundance of distraction, take over. I wonder though, what would it really look like, to be able to work in this way, in a sustained fashion? What does it mean to load, to hold onto, and to lose, something with such intensity? Does it apply to other disciplines as well? Does it apply to other areas in life? Does it really take that much time to load, and unload? And if it does, what does it mean, to live in such a way?
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David Choi

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Thinking about the calibration between the real world vs the virtual world in head-tracked VR displays:

http://radicade.posterous.com/calibrating-for-one-to-one-correspondence-in
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thanks man. stay tuned, lots more coming
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David Choi

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My implementation of a kinect-based mirror:

http://radicade.posterous.com/kinect-mirror
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David Choi

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Just attended a fantastic seminar on machine learning and data mining. It's the fifth speaker in a part of a series hosted at Adobe called "Big Data Analytics", talk was by UCI prof Padhraic Smyth, who heads up the UCI machine learning group.

Video of the talk is up (link below). Worth a watch for its many examples and applications of how big data is being used to solve real world problems -- including google, facebook, NASA, health sciences, and the Netflix prize.

Talk starts around 7:50 m.

http://tinyurl.com/BigDataAnalytics-5
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David Choi

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Stanford online classes open for enrollment (free):
1. AI: http://www.ai-class.com/
2. Machine Learning: http://www.ml-class.org/course/class/index
3. Databases: http://www.db-class.org/course/class/index

Any takers?
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Interesting but I'm in the non-free Scientific revolutions class at Stanford this term
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