Liquid-level position measuring method and system

Details Liquid-level position measuring method and system Liquid-level position measuring method and system

1998-06-17

2000-08-01

Assouad, Patrick

Data processing: measuring, calibrating, or testing

Measurement system

382100, 73293, 702 55, G06K 900

Patent

active

06098029&

ABSTRACT:
The present invention has an object to measure the height of a liquid surface automatically by an image processing. According to the present invention, therefore, the situation over a side wall and the situation of the liquid surface in the image, as taken from an ITV camera, of the neighborhood of the liquid surface are image-analyzed to estimate the boundary position between the side wall and the liquid surface thereby to determine the position of the liquid surface on the image, and the liquid-surface position on the image is transformed from an image coordinate system to a real spatial coordinate system to determine a real position of the liquid surface.

REFERENCES:
patent: 4202398 (1980-05-01), Osugi
patent: 4298887 (1981-11-01), Rode
patent: 4576197 (1986-03-01), Kempers
patent: 4733095 (1988-03-01), Kurahashi et al.
patent: 5136661 (1992-08-01), Kobayasi et al.
patent: 5414778 (1995-05-01), Schwartz et al.
patent: 5427161 (1995-06-01), Luhmann et al.
patent: 5495429 (1996-02-01), Craven et al.

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