DocumentCode :
931238
Title :
Parallel computations of optic flow in early image processing
Author :
Buxton, B.F. ; Stephenson, B.K. ; Buxton, H.
Author_Institution :
GEC Research Laboratories Ltd., Hirst Research Centre, Wembley, UK
Volume :
131
Issue :
6
fYear :
1984
fDate :
10/1/1984 12:00:00 AM
Firstpage :
593
Lastpage :
602
Abstract :
Current calculations of optic flow from the motion of edge features in an image sequence are described, and used to illustrate the implementation of low-level image processing calculations on an SIMD (single instruction multiple data) machine. Most of the computational effort in the optic flow calculations is required for carrying out large, multidimensional, spatiotemporal convolutions over the image data, which may be carried out efficiently in parallel by mapping the image pixels into the processor array. Examples are given, showing that computation times consistent with video data input rates can easily be achieved. Later stages of the optic flow calculation, after moving edges features have been detected, are also carried out in parallel, although the computations are no longer completely uniform over the image data arrays. A VLSI processor array, embodying many of the features required for low-level image processing calculations, is briefly described.
Keywords :
optical information processing; picture processing; SIMD; VLSI processor array; computational effort; early image processing; edge features; image data arrays; image pixels; image sequence; low-level image processing; optic flow; parallel computations; single instruction multiple data; spatiotemporal convolutions; video data input;
fLanguage :
English
Journal_Title :
Communications, Radar and Signal Processing, IEE Proceedings F
Publisher :
iet
ISSN :
0143-7070
Type :
jour
DOI :
10.1049/ip-f-1.1984.0092
Filename :
4646359
Link To Document :
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