Object discriminating apparatus and method therefor

Details Object discriminating apparatus and method therefor Object discriminating apparatus and method therefor

1988-08-17

1991-05-28

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 1, 382 28, 356379, G06K 900

Patent

active

050201140

ABSTRACT:
An object sensor outputs an obstacle detection signal in response to passing of an obstacle. A central control unit reads a 2-dimensional image from an imaging unit in response to the obstacle detection signal. A detection area is obtained by subtracting a background image prestored in a memory from the input 2-dimensional image. The detected image on a 2-dimensional plane is transformed into image data in a 3-dimensional space. The CCU computes the projection area of the image data on an arbitrary plane in the 3-dimensional space. The object is discriminated by comparing the computed projection area with the projection area based on the reference value of the object prestored in the memory.

REFERENCES:
patent: 4007440 (1977-02-01), Kono et al.
patent: 4646354 (1987-02-01), Naito et al.
patent: 4752964 (1988-01-01), Okada et al.
patent: 4965844 (1990-10-01), Oka et al.
Article from Principles of Interactive Computer Graphics; Entitled: "Three Dimensional Transformations and Perspective"; pp. 333-365.

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