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Method-for-measuring-of-chromatic-optical-density

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Method for measuring of chromatic optical density

Details

Inventors: Sasaki, Takashi;
Assignee: Canon Kabushiki Kaisha (JP)
Primary Examiner: Groody; James J.
Assistant Examiner: Powell; Mark R.
Attorney, Agent or Firm: Fitzpatrick, Cella, Harper & Scinto

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.

DETAILED DESCRIPTION It is an object of the present invention to provide a measuring method whereby an accurate density value of a color material is obtained in consideration of the above-mentioned problems.
Another object of the invention is to provide a color image forming method whereby an accurate and higher quality is obtained from a measurement value.
Still another object of the invention is to provide a color image forming method whereby a color image of an original picture can be reproduced with a high degree of fidelity.
Still another object of the invention is to provide a color image forming method whereby a color image of an original picture can be reproduced with a high degree of fidelity even for any of a plurality of input sources of a color image signal.
Other objects and features of the present invention will become apparent from the following detailed description and the appended claims with reference to the accompanying drawings.

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