Distance measuring apparatus

Details Distance measuring apparatus Distance measuring apparatus

1994-12-12

1996-09-17

Chin, Tommy P.

Television

Special applications

Object or scene measurement

348170, 382103, H04N 718

Patent

active

055573231

ABSTRACT:
A distance measuring apparatus sets a plurality of sub-windows in a picture plane so that the size of each sub-window having a contrast higher than a predetermined value is as small as possible but is greater than a minimum size. Therefore, it is possible to recognize the shape of an object and to measure a distance thereto with high resolution and high precision. For high speed processing, the sub-windows are successively updated in a predetermined cycle in such a manner that only those sub-windows which exist in a region in which a deviation of an image of the object last sensed relative to a previous image thereof is greater than a prescribed value are updated.

REFERENCES:
patent: 4944023 (1990-07-01), Imao et al.
patent: 5008748 (1991-04-01), Carr et al.
patent: 5381173 (1995-01-01), Asayama
ITEJ Technical Report, vol. 12, No. 24, pp. 1-6, Jun. 1988.

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