Orientation Statistics
نویسندگان
چکیده
منابع مشابه
Using Aspect-Orientation to Manage Database Statistics
Database-internal statistics are very important for cost-based query optimizers. Only if an optimizer has accurate statistical information about data, it provides excellent execution plans for queries; if those statistics are out of date, then queries will be badly optimized and performance suffers. Unfortunately, a lot of database systems currently do not manage statistics adequately; they onl...
متن کاملThe capacity limitations of orientation summary statistics.
The simultaneous-sequential method was used to test the processing capacity of establishing mean orientation summaries. Four clusters of oriented Gabor patches were presented in the peripheral visual field. One of the clusters had a mean orientation that was tilted either left or right, whereas the mean orientations of the other three clusters were roughly vertical. All four clusters were prese...
متن کاملOrientation Difference Statistics for Texture Description
This paper presents a new approach fur the description of directional textures based on the stady of their orientation and cuherence fields. We apply the featurebased interaction maps to the characterization of an orientation field. The features are extracted from orientation spatial difference histograms. The representation of a feature, as a ftinctiun of the spacing vector used to compute the...
متن کاملVisual discrimination of orientation statistics in crowded and uncrowded arrays.
When required to identify the orientation of an item outside the center of the visual field, the mean orientation predicts performance better than the orientation of any individual item in that region. Here I examine whether the visual system also preserves the variance of orientations in these so-called "crowded" displays. In Experiment 1, I determined the separation between items necessary to...
متن کاملThe computation of orientation statistics from visual texture
This paper examines how observers estimate the overall orientation of spatially disorganised textures containing variable orientation. Experiments used asymmetrical distributions of orientations to separate the predictions from different models of average orientation estimation. Stimuli were composed of two spatially intermingled sets of oriented patches, each set having Gaussian distributed el...
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ژورنال
عنوان ژورنال: Nature
سال: 1967
ISSN: 0028-0836,1476-4687
DOI: 10.1038/213017b0