Cells in the animal early visual cortex are sensitive to contour orientations and form repeated structures known as orientation columns.
Cells in the early visual cortex in many species of animals are sensitive to contour orientations (Hubel and Wiesel 1962, 1968).
Hence, these retinal signals emphasize small spatial details in visual structures during fixation (Desbordes and Rucci 2007; Rucci et al. 2007; Rucci 2008; Kuang et al. 2012), even of contour orientations (Rucci and Desbordes, 2003).
Given the prediction that contour orientations remain stable over prolonged periods of time, as during periods of fixation, error signals would correspond to representations of change, as measured here.
The figure shows an example of a spatial frequency map in one instance of the model on which areas of high (white contours) and low (dark contours) orientation selectivity are superimposed.
Firstly, according to the accuracy requirements of the tool tip contour and tool orientation tolerances, the corner is rounded with a pair of PH curves directly.
It is believed that certain contour attributes, specifically orientation, curvature and linear extent, provide essential cues for object (shape) recognition.
The results are typically presented in the form of a contour plot identifying orientations of proposed excavation planes that may lead to large volumes (or masses) of unstable blocks and wedges.
When contours of different orientation meet at the same place non-collinear orientation combinations, namely junctions, are formed.
Pinwheel centers were visually counted with the aid of Image J software (version 1.37, National Institutes of Health, USA) from an iso-orientation contour image derived from the corresponding angle map.
