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Is perception of the whole based on perception of its parts? There is psychological and physiological evidence for parts-based representations in the brain, and certain computational theories of object recognition rely on such representations. But little is known about how brains or computers might learn the parts of objects. Here we demonstrate an… (More)

One of the great puzzles of visual perception is how an image that is in perpetual flux can still be seen by the observer as the same object. In an informative Perspective, Seung and Lee explain the mathematical intricacies of two new algorithms for modeling the variability of perceptual stimuli and other types of high-dimensional data (Tenenbaum et al.,… (More)

- Dong Hee Kim, Dong Do Lee, Ho Joon Kim, Keum Chan Whang
- IEEE Trans. Vehicular Technology
- 2000

The neural integrator of the oculomotor system is modeled as a network of spiking, conductance-based model neurons. The static function of the integra-tor, holding the eyes still when the head is xed in space, is the focus of the modeling. The synaptic weight matrix, which is of outer product form, is tuned by minimizing the mean squared drift velocity o f… (More)

A simple but powerful modiication of the standard Gaussian distribution is studied. The variables of the rectiied Gaussian are constrained to be nonnegative, enabling the use of nonconvex energy functions. Two multimodal examples, the competitive and cooperative distributions, illustrate the representational power of the rectiied Gaussian. Since the… (More)

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