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Edward Adelson's group has devised a new set of visual illusions that serve as tools for exploring the operations of lightness perception. These experiments have exposed a set of mid-level mechanisms operating with "mid-level" representations, sensitive to statistical and configural aspects of an image. Dr. David Somers used fMRI to show that visual attention can modulate brain activity even in the first stages of visual processing in area VI. Previously it had been thought that attentionís effects would only be observed at higher levels of processing

Ruth Rosenholtz is starting up her lab. Interested in visual search? Texture perception? Check out her work from when she was at PARC research labs.



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