Color analysis based upon transformation to spherical coordinate

Details Color analysis based upon transformation to spherical coordinate Color analysis based upon transformation to spherical coordinate

1991-04-03

1993-04-27

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 18, 382 1, G06K 936

Patent

active

052069184

ABSTRACT:
A color analysis and evaluation method is disclosed based upon a transformation of three primary color measurements, red, blue and green, from an x,y,z cartesian coordinate system to a rotated spherical coordinate system in which a target color vector in the cartesian coordinate system defines the primary z axis in the rotated spherical coordinate system. In one disclosed embodiment, a computerized color analysis is performed upon a finished baked product such as a pound cake with a split in the top thereof. A detector such as a color television camera measures three primary color components of each pixel of a matrix of pixels into which an image of the product is divided by the detector. The three measured primary color components are then transposed to a reference spherical coordinate system having the z axis aligned with a target color for the product. A determination is then made as to whether a measured color vector is within predetermined limits to determine if it is within an acceptable color sector.

REFERENCES:
patent: 3745527 (1973-07-01), Yoshimura et al.
patent: 3999047 (1976-12-01), Green
patent: 4583186 (1986-04-01), Davis et al.
patent: 4623973 (1986-11-01), Hoffrichter et al.
patent: 4624367 (1986-11-01), Shafer et al.
patent: 4731663 (1988-03-01), Kovalchick et al.
patent: 4735323 (1988-04-01), Okada et al.
patent: 4797738 (1989-01-01), Kashi et al.
patent: 4812904 (1989-03-01), Maring et al.
patent: 4991223 (1991-02-01), Bradley
patent: 5062066 (1991-10-01), Scher et al.
patent: 5085325 (1992-02-01), Jones et al.

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