Confessions of a researchaholic

2010-02-16

The Rowling criterion

Filed under: Imaginary,Real — liyiwei @ 3:41 pm
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I guess I am not the only one who ever heard people commenting that “computer graphics research is mostly done” or “all the big ideas in graphics have been discovered and the remaining research is mainly about incremental ideas” or something like that.

If you look at history, similar comments have been made about physics in the early twentieth century when people believed that Newtonian physics is near perfection and all the remaining problems are incremental. And then came quantum physics, relativity, and other ground breaking stuff.

I do not think computer graphics is done for a very simple reason. Every year I have been kept seeing interesting/exciting papers coming out of various graphics conferences. So these pessimistic comments may reflect more about the status of people who made them rather than the status of computer graphics research.

And I would not claim graphics is done until people can author images, movies, and animations as easily as writing articles. And these do not even have to be good; not everyone can be Shakespeare, but at least almost everyone (who is literate without severe handicaps like blindness) can easily write an article, a letter, or a diary entry via existing tools, ranging from simple pen and pencil to more advanced text editing software. But how many people today can easily make an image or a movie all alone? It is true that amazing effects have been achieved in many movies, but these almost always involve significant resources, not least a large team of talented professionals. (Take a look of the end credits of the kinds of movies like Harry Potter or Avatar.)

Talking about Harry Potter, this is actually a good example on the difference between authoring textual and non-textual artifacts: for the former, a good writer like J.K. Rowling could single-handedly author an entire book series, but for the latter, a large team of talented staff has to be devoted to realize the books into movies. And this a technology, not talent issue; no existing tools today would have allowed J.K. Rowling to turn her visions into movies, even though these imagery would likely have existed in her minds while writing the books. (I believe she can do that because that is exactly what happened in my minds when reading her books.)

Thus, allow me to propose a necessary condition to claim the completeness of graphics research, the “Rowling criterion”: it should be as easy for a single individual to author a movie/animation/image as to write an article. And when such technology is available, I would happily turn myself from a researcher into a content creator.

2010-01-25

Pepper

Filed under: Imaginary — liyiwei @ 2:31 pm
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The most muscular pepper I have seen; photo by Edward Weston.

2010-01-10

Robotic chair

Filed under: Imaginary,Real — liyiwei @ 4:12 pm
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You are witnessing the origin of the Terminators. Checkout the original website here for more information.

[youtube=http://www.youtube.com/watch?v=Pxq2chA5AT8&hl=en_US&fs=1&]

2009-12-15

Toon shading

Filed under: Imaginary,Real — liyiwei @ 6:52 pm
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[youtube=http://www.youtube.com/watch?v=tZkag7M_i5A&hl=en_US&fs=1&]

Appleseed: Ex Machina is the best toon shaded animation I have ever seen. It really beats 2D cel animation.
I am too busy right now to write down more details, but just checkout this movie if you like anime or computer graphics.

Also, don’t miss the bonus features. I find it particularly interesting that the American crew talked about the “amazing collaboration” between Chinese (John Woo, producer) and Japanese (Shinji Aramaki, director) as though these two countries ought to start the third world war instead of collaborating on animation projects.

2009-10-24

Schrödinger’s cat

Filed under: Imaginary,Real — liyiwei @ 4:06 pm
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When I was a kid I have been deeply fascinated by theoretical physics (to the point that I was propelled to pick up college level calculus and physics around age 15), and a recent article in Economist reminded me of one of the questions I had in my mind a long time ago.

Here it is. If someone opens the box containing Schordinger’s cat without my knowledge, what will the cat’s existence to me? Is it still a quantum superposition (i.e. the cat is dead and alive simultaneously), or it will collapse into a definite probabilistic state (i.e. the cat is either dead or alive with a certain probability, but not both)?

I never ended up pursuing theoretical physics because I opted for a more practical major in college that would allow me to “hack” things, so I still do not know the answer to that old question. But now I think for all practical reasons, the cat (or any macroscopic object) is very unlikely to be in a true quantum superposition for a very simple reason: it is simply too macroscopic to be devoid of quantum disturbances that act as probes to collapse the quantum states. Thus, for all practical purposes, the intriguing situation is unlikely to exist; the cat is either dead or alive, but not both.

Growing old does not necessarily make one wiser, but likely more pragmatic.

2009-09-29

Anti-Neo

Filed under: Imaginary — liyiwei @ 5:56 pm
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If I were a character in The Matrix, I want to be Anti-Neo who drags everyone from the real world back into the matrix. The synthetic world is so much easier to manipulate than the real one.

2009-09-23

Life and Monte Carlo sampling

Filed under: Imaginary,Real — liyiwei @ 10:47 am
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I spotted this very interesting article today from a friend’s facebook posting.

I thought about this very similar issue before, and I could not resist the analogy between life and Monte Carlo ray tracing: each individual is a like a stochastic ray that samples a particular path, and in the end a grand entity (e.g. God for the creationists or natural selection for the Darwinists) renders the future by summing up all our individual contributions. In both cases each individual is allowed to sample only one path; there might be imperfections for each individual path but the grand entity only cares about the soundness of their joint statistics.

2009-09-21

Square word calligraphy

Filed under: Imaginary,Real — liyiwei @ 5:39 pm
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I spotted these unique calligraphic works by Xu Bing in Stanford museum a few days ago. These are quite amusing works. When I first saw these, I had no knowledge about the artist’s method, and thus the art works present an interesting puzzle for me.

But eventually I figured out what is going on, via the “hint” provided by the way the artist expressed his own name:

2009-09-01

Waltz with Bashir

Filed under: Imaginary,Real — liyiwei @ 4:48 pm
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The phrase “animated documentary” may sound like an oxymoron, but that is exactly what I would use to describe Waltz with Bashir. I was originally attracted to this movie due to its graphics effects, especially on the masterful use of large regions of monotonic colors. What I did not expect was thought provoking storytelling, and I was thrilled to find plenty in this movie.

I highly recommend this movie, as well as the behind the scene bonus features on how the movie is made.

[youtube=http://www.youtube.com/watch?v=ylzO9vbEpPg&hl=en&fs=1&]

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