Method for measuring of chromatic optical density

Details Method for measuring of chromatic optical density Method for measuring of chromatic optical density

1990-02-20

1990-10-23

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

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358 75, H04N 146

Patent

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049656635

ABSTRACT:
A method of optically measuring chromatic densities of a sample. In the method, three stimulus values, X, Y and Z, of light reflected from the sample, are derived. A cyan density, a magenta density and a yellow density are determined for the sample, using the X, Y and Z stimulus values, and in addition, three stimulus values, Xo, Yo and Zo of a standard color, such as white. With this method, a color image of an original picture may be accurately reproduced with a high fidelity.

REFERENCES:
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patent: 4136360 (1979-01-01), Hoffrichter et al.
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patent: 4622582 (1986-11-01), Yamada
patent: 4631578 (1986-12-01), Sasaki et al.
patent: 4679074 (1987-07-01), Sugiura et al.
patent: 4717954 (1988-01-01), Fujita et al.
Japan Industrial Standard, JIS Z8722-1982, "Methods of Measurement for Color of Reflecting or Transmitting Objects", English translation.

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