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 کاملScale-Adaptive Orientation Estimation
This paper focuses on directional textures. It provides a new framework for the design of convolution masks dedicated to orientation estimation and an adaptive algorithm which chooses the best mask size for each pixel. The design of the adaptive algorithm is based on the combination of two complementary operators: a gradient based operator which is adapted to sloped regions and a valleyness det...
متن کاملVisual object aVordances: Object orientation
Five experiments systematically investigated whether orientation is a visual object property that aVords action. The primary aim was to establish the existence of a pure physical aVordance (PPA) of object orientation, independent of any semantic object–action associations or visually salient areas towards which visual attention might be biased. Taken together, the data from these experiments su...
متن کاملPostdictive Modulation of Visual Orientation
The present study investigated how visual orientation is modulated by subsequent orientation inputs. Observers were presented a near-vertical Gabor patch as a target, followed by a left- or right-tilted second Gabor patch as a distracter in the spatial vicinity of the target. The task of the observers was to judge whether the target was right- or left-tilted (Experiment 1) or whether the target...
متن کاملRobust Estimation for Orientation Analysis
From trivial edge-detection techniques to the use of a quadrature pair of Gabor filters, the status quo in orientation analysis entails some form of convolution over a window of interest. Although Gabor filters have increased in popularity, most likely due to its computational efficiency as well as being a viable model for the human visual system, it is not without its shortcomings. Most promin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Perception & Psychophysics
سال: 1989
ISSN: 0031-5117,1532-5962
DOI: 10.3758/bf03208083