Archive for February, 2012


Current algorithm used to extract sparse features as shown in the previous post.

Extracted sparse features

My current online feature abstraction seems to work fine now. After feeding the system a 30 minute video once it abstracts features (or “components”) of the input by changing each virtual neurons synapses (right plot in image). This is done in a way which yield a sparse and quasi-binary neural response to the input (“sparse” to decorrelate the mixed signals and “quasi-binary” to be tolerant to noise).

The reconstruction shows that all essential information is preserved and can be reconstructed from the sparse neural response.