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Discovering Harmony: A Hierarchical Colour Harmony Model for Aesthetics Assessment
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Several aspects of the viewing situation affect the ability to determine heading from optical flow. These include the amount of depth variation and number of texture elements in the scene, the location and amount of the visual field stimulated, and the position of the focus of expansion within the stimulus. Without a quantification of the discrimination information provided by the stimuli prese...
متن کاملIntegration mechanisms for heading perception.
Previous studies of heading perception suggest that human observers employ spatiotemporal pooling to accommodate noise in optic flow stimuli. Here, we investigated how spatial and temporal integration mechanisms are used for judgments of heading through a psychophysical experiment involving three different types of noise. Furthermore, we developed two ideal observer models to study the componen...
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| We describe a parallel analog VLSI architecture that integrates optical ow data obtained from arrays of elementary velocity sensors to estimate the direction of heading for pure translational motion sequences. We performed software simulations at di erent levels of abstraction to evaluate the most important qualitative properties of the optical ow eld, determine the best functional operators ...
متن کاملRecovering heading for visually-guided navigation.
We present a model for recovering the direction of heading of an observer who is moving relative to a scene that may contain self-moving objects. The model builds upon an algorithm proposed by Rieger and Lawton, based on earlier work by Longuet-Higgins and Prazdny. The algorithm uses velocity differences computed in regions of high depth variation to locate the focus of expansion, which indicat...
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ژورنال
عنوان ژورنال: Nature
سال: 1977
ISSN: 0028-0836,1476-4687
DOI: 10.1038/266002a0