By Johannes M. Zanker, Jochen Zeil (auth.), Johannes M. Zanker, Jochen Zeil (eds.)
In six elements, this booklet considers the level to which computational, neural, and ecological constraints have formed the mechanisms underlying movement vision:
- Early movement imaginative and prescient - movement signs for neighborhood and international research - Optical move styles - movement imaginative and prescient in motion - Neural Coding of movement - movement in ordinary Environments
Each subject is brought by means of a keynote bankruptcy that's followed through a number of significant other articles. Written by way of a global workforce of specialists in neurobiology, psychophysics, animal behaviour, computing device imaginative and prescient, and robotics, the ebook is designed to discover as comprehensively as attainable the current kingdom of information in regards to the significant components that experience guided the evolution of movement vision.
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Extra info for Motion Vision: Computational, Neural, and Ecological Constraints
By contrast, On OS cells with somata separated by about the width of a dendritic field, which are more likely to comprise cells with the same preferred direction, show economical coverage of the retina with few dendritic crossings (Buhl and Peichl 1986). The territorial organization of the On OS cells thus appears to be similar to that of the On-Off OS cells, including the presence of tip-to-tip dendritic contacts which make it difficult to assign some dendrites to their cell of origin. The On OS cells, which stratify around 75% depth of the inner plexiform layer, lie adjacent to the sublamina b arborization of the On-Off OS cells and the displaced starburst amacrine cells, which stratify around 70% depth of the inner plexiform layer (Famiglietti 1992c).
First, the number of On-Off DS cells exceeds the number of On DS cells by an order of magnitude and it does not make sense from the point of neuronal economy to assign some 40,000 On-Off DS cells simply to provide a global retinal slip signal. This view discounts the importance of the demonstration that the four preferred directions of the On-Off DS cells appear to be aligned with the four rectus muscles (Oyster and Barlow 1967), without abrogating the related concept that the four subtypes of On-Off DS ganglion cells enable higher order DS neurones to make use of excitation and inhibition from spatially superimposed mirror-symmetric subtypes (anterior/posterior or upwards/downwards; Levick et al.
1969). Thus the OS units in the LGN may be comparable in complexity to the fully opponent version of the correlation-type movement detector (Hassenstein and Reichardt 1956; Reichardt 1961; Borst and Egelhaaf 1989, 1990), with the two convergent subtypes of On-Off OS ganglion cells corresponding to the mirror-symmetrical subunits in the Reichardt model. As detectors of local motion, the On-Off OS cells may serve two rather distinct functions, both concerned with image segmentation (see Part II of this volume).
Motion Vision: Computational, Neural, and Ecological Constraints by Johannes M. Zanker, Jochen Zeil (auth.), Johannes M. Zanker, Jochen Zeil (eds.)