Apparatus and method for detecting a velocity of a moving object

Details Apparatus and method for detecting a velocity of a moving object Apparatus and method for detecting a velocity of a moving object

1996-04-19

1998-06-23

Nguyen, Tan Q.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Traffic analysis or control of surface vehicle

701 28, 701117, 382107, 382122, 340936, 340937, G08G 1017, G08G 1054

Patent

active

057714851

ABSTRACT:
An apparatus for detecting a velocity of a moving object includes: a camera for photographing a predetermined area in which the object moves, at intervals of time T; a projector for projecting brightness information of each pixel in an image photographed at the intervals of time T by the camera, onto a longitudinal axis along a moving direction of the object, and for accumulating each brightness value on the longitudinal axis to generate pieces of one-dimensional projected information; a buffer for storing the pieces of one-dimensional projected information from the camera; and a detector for determining the velocity of the object moving in the predetermined area from the pieces of one-dimensional projected information stored in the buffer. Information to be processed becomes one-dimensional projected information, so even if there are a large number of pieces of one-dimensional projected information, they will be nearly the same as an amount of information of an image photographed at intervals of time T. Accordingly, information can be processed simply and a velocity can be detected accurately.

REFERENCES:
patent: 4433325 (1984-02-01), Tanaka et al.
patent: 4709264 (1987-11-01), Tamura et al.
patent: 4825393 (1989-04-01), Nishiya
patent: 4847772 (1989-07-01), Michalopoulos et al.
patent: 5353021 (1994-10-01), Toyama
patent: 5509082 (1996-04-01), Toyama et al.

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