Category: lirec
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Plant spirits, AI and gitorious
This week has been about researching the next steps for the germination x design. Principally looking at how we can use the game to demonstrate and exploit some of the work on the Lirec project. I’ve had a speculative look at how we could use companions to fit the theme of a permaculture game, and…
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Particle filters
A particle filter is a technique used in computer vision to estimate the state of a system, given noisy data from fallible sensors. The underlying idea is called a hidden markov model, and looks something like this: The assumption is that any state of the system is dependant on it’s previous state (and thus all…
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A week in Budapest
I spent last week in Budapest, the first half was a lirec consortium meeting. We spent Tuesday morning finding out about dog and human behaviour at the Department of Ethology at the Eötvös Loránd University. I think the most facinating part for me was the area of human understanding of dog vocalisation, as we have…
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Plotting face space
I’m flitting around a lot between projects… Back on appearance models for the lirec project, this is a small slice of face space, the plots represent images of the individuals in different lighting conditions – seeing how the lighting affects the spread of the data. One of the images for each individual is shown at…
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More expression recognition
Making myself look ridiculous as usual, but this works better than I had expected: It’s taking the vector in face space between example smile and frown expressions and then projecting the new face it doesn’t know about onto it (the dot product in multi dimensions) to give a value for how smiley or how frowny…
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Expression recognition attempts
Parametrising gormlessness: I’m trying to parametrise expressions, which involves making faces at a web camera all day. The bars along the top visualise the parameters for the face model that my face generates, and the rather scary image next to my face is the result of putting these numbers back into the face model to…
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Lirec: python scripting and military robots
I’ve been starting to get back into the Lirec project again this week, starting off by wrapping all my C++ vision code to python in order to script it. This has sped the research work up already, as I’ve been able to script some initial experiments on expression recognition in a couple of days –…
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Eigenface Animation
This gang of motley characters are the eigenfaces expressed though time, so I can see what kind of changes each vector represents in my eigenface-space. If you look closely they tend to express lighting changes, expressions, face shape and pose (head rotation) often jumbled together in some strange form. The next target is to separate…
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Benchmarking identification
I now have two methods of face identification. In an attempt to apply more method to my madness, I’ve been compiling images to use in benchmark tests to find out which one is better, and by how much. I’ve used the yale face database B, which has ten people in lots of lighting conditions, and…
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Face recognition fail