Shape Perception: Complex Contour Representation in Visual Area V4
نویسندگان
چکیده
A recent study has put forward a physiologically plausible population model that implements a parts-based shape-coding scheme for macaque visual area V4.
منابع مشابه
Neural basis of shape representation in the primate brain.
Visual shape recognition--the ability to recognize a wide variety of shapes regardless of their size, position, view, clutter and ambient lighting--is a remarkable ability essential for complex behavior. In the primate brain, this depends on information processing in a multistage pathway running from primary visual cortex (V1), where cells encode local orientation and spatial frequency informat...
متن کاملA comparative study of shape representation in macaque visual areas v2 and v4.
We compared aspects of shape representation in extrastriate visual areas V2 and V4, which are both implicated in shape processing and belong to different hierarchical levels. We recorded responses of cells in awake, fixating monkeys to matched sets of contour and grating stimuli of low or intermediate complexity. These included simple stimuli (bars and sinusoids) and more complex stimuli (angle...
متن کاملResponses to contour features in macaque area V4.
The ventral pathway in visual cortex is responsible for the perception of shape. Area V4 is an important intermediate stage in this pathway, and provides the major input to the final stages in inferotemporal cortex. The role of V4 in processing shape information is not yet clear. We studied V4 responses to contour features (angles and curves), which many theorists have proposed as intermediate ...
متن کاملSpectral receptive fields do not explain tuning for boundary curvature in V4.
The midlevel visual cortical area V4 in the primate is thought to be critical for the neural representation of visual shape. Several studies agree that V4 neurons respond to contour features, e.g., convexities and concavities along a shape boundary, that are more complex than the oriented segments encoded by neurons in the primary visual cortex. Here we compare two distinct approaches to modeli...
متن کاملSpectral Receptive Fields Do Not Explain Tuning for Boundary
23 24 The mid-level visual cortical area V4 in the primate is thought to be critical for the neural 25 representation of visual shape. Several studies agree that V4 neurons respond to 26 contour features, e.g., convexities and concavities along a shape boundary, that are 27 more complex than the oriented segments encoded by neurons in the primary visual 28 cortex. Here we compare two distinct a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Current Biology
دوره 13 شماره
صفحات -
تاریخ انتشار 2003