Semantic control of feature extraction from natural scenes.

ABSTRACT: In the early stages of image analysis, visual cortex represents scenes as spatially organized maps of locally defined features (e.g., edge orientation). As image reconstruction unfolds and features are assembled into larger constructs, cortex attempts to recover semantic content for object recognition. It is conceivable that higher level representations may feed back onto early processes and retune their properties to align with the semantic structure projected by the scene; however, there is no clear evidence to either support or discard the applicability of this notion to the human visual system. Obtaining such evidence is challenging because low and higher level processes must be probed simultaneously within the same experimental paradigm. We developed a methodology that targets both le

SUBMITTER: Neri P 

PROVIDER: S-EPMC3913878 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature