منابع مشابه
Improved Orientation Selectivity for Orientation Estimation
Filtering of an image with rotated versions of an orientation selective filter yields a set of images which can be stacked to form an orientation space. Orientation space provides a means of analyzing overlapping and touching anisotropic textures. A set of rotated k order directional derivatives yields a discrete orientation space, which allows interpolation. Next we apply a deconvolution schem...
متن کاملRobust quantification of orientation selectivity and direction selectivity
Neurons in the visual cortex of all examined mammals exhibit orientation or direction tuning. New imaging techniques are allowing the circuit mechanisms underlying orientation and direction selectivity to be studied with clarity that was not possible a decade ago. However, these new techniques bring new challenges: robust quantitative measurements are needed to evaluate the findings from these ...
متن کاملCommentary: Robust quantification of orientation selectivity and direction selectivity
Citation: Tzvetanov T (2016) Commentary: Robust quantification of orientation selectivity and direction selectivity. Mazurek et al. (2014) provided an important step forward in changing the old-fashioned manner of reporting orientation and/or direction selectivity of cells that involved the infamous OI–orientation index, DI, and related quantities such as orientation bias and direction bias (OB...
متن کاملSubcortical orientation biases explain orientation selectivity of visual cortical cells
The primary visual cortex of carnivores and primates shows an orderly progression of domains of neurons that are selective to a particular orientation of visual stimuli such as bars and gratings. We recorded from single-thalamic afferent fibers that terminate in these domains to address the issue whether the orientation sensitivity of these fibers could form the basis of the remarkable orientat...
متن کاملSupranormal orientation selectivity of visual neurons in orientation-restricted animals
Altered sensory experience in early life often leads to remarkable adaptations so that humans and animals can make the best use of the available information in a particular environment. By restricting visual input to a limited range of orientations in young animals, this investigation shows that stimulus selectivity, e.g., the sharpness of tuning of single neurons in the primary visual cortex, ...
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ژورنال
عنوان ژورنال: eLife
سال: 2018
ISSN: 2050-084X
DOI: 10.7554/elife.39762