Color classification system and method capable of automatically

Details Color classification system and method capable of automatically Color classification system and method capable of automatically

1996-08-21

1998-05-12

Font, Frank G.

Optics: measuring and testing

By shade or color

With color transmitting filter

356416, 356417, 348266, G01N 2125

Patent

active

057514291

ABSTRACT:
A color classification system and method for classifying, judging and/or identifying objects by color. An optical system utilizes light from an object to form an image on an imaging device. A plurality of optical band-pass filters each having a different pass band are provided between the object and the imaging device. The optical band-pass filters include a plurality of measurement filters for use in measuring a color of the object and a test filter for use in judging which one of the measurement filters should be applied to the object. A changeover section changes between the optical band-pass filters. A computing circuit performs at least one of a color classification and a color judgment based on a spectral characteristic of the imaged object through a statistical approach, and a control section causes the changeover section to select an effective one of the measurement filters based on a judgment by the computing circuit of a result sensed by the test filter. The plurality of optical band-pass filters are arranged in a plurality of filter sets each of which has at least one filter, and the changeover section includes a filter changeover mechanism for changing between the optical band-pass filters in one of the filter sets, and a filter-set changeover mechanism for changing between the plurality of filter sets.

REFERENCES:
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patent: 5422730 (1995-06-01), Barlow et al.
patent: 5627648 (1997-05-01), Garrett
Q. Tian et al; Image classification by the Foley-Sammon transform; Jul. 1986; pp. 834-840; Optical Engineering, vol. 25, No. 7.

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