Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
1998-08-27
2001-09-18
Barlow, John (Department: 2853)
Incremental printing of symbolic information
Ink jet
Controller
C347S014000, C347S043000, C347S023000
Reexamination Certificate
active
06290318
ABSTRACT:
BACKGROUNDS OF THE INVENTION
1. Field of the Invention
The present invention relates to a color printer system for executing color printing on a paper, and more particularly, to a color printer system for correcting color so as to be printed in a proper hue depending on the color of the paper.
2. Description of the Related Art
When displaying a color image object on a display or printing it out, the actually output hue of the image varies according to an output device, even if the color image object is the identical. This is caused by a difference of the color gamut (color space) in an output device, for example, a display or a printer. Then, there have been proposed various kinds of image output devices having a color correcting function with consideration for a difference of color space in an output device.
These conventional image output devices include a device disclosed in, for example, Japanese Patent Publication Laid-Open (Kokai) No. Heisei 9-44132 “Image Output Device”. This publication discloses an image output device, with the data including a plurality of image objects stored therein, capable of automatically interlocking color treatment for the other image object associated with the specified image object when specifying the optimum color treatment for a given image object.
Provided with a function of correcting colors depending on an output device, however, the above mentioned conventional image output device gives no consideration to the color of a paper on which a color image is printed, in color printing. Therefore, the hue of the actually printed image may be different from the expected hue.
There are various kinds of papers for use in printout. For example, a white paper ranges from a truer white paper to a creamy white paper such as a recycled paper or a post card. Depending on the necessity, a color image may be printed on a colored paper. Therefore, a function of correcting colors of an image depending on the color of a paper is being desired.
SUMMARY OF INVENTION
An object of the present invention is to provide a color printer system capable of obtaining color printing results of an adequate hue by correcting colors of an image depending on the color of a paper.
According to one aspect of the invention, a color printer system for executing color printing of a color image object on various kinds of papers, comprises
paper color characteristic reading means for detecting color characteristic of a printing surface of a paper to be used in printing,
color converting means for performing color conversion processing of the color image object according to the color characteristic of the paper obtained by the paper color characteristic reading means, and
printing means for executing color printing based on the color image object processed by the conversion of the color converting means.
In the preferred construction, the color printer system further comprises color characteristic information storing means for storing information on the color characteristic of the paper obtained by the paper color characteristic reading means,
wherein the color converting means performs the color conversion processing of the color image object by use of the color characteristic information read out from the color characteristic information storing means when the color characteristic of a printing surface of a paper to be used in printing is stored in the color characteristic information storing means.
In another preferred construction, the color converting means performs the color conversion processing of the color image object based on said color characteristic of the paper and color characteristic of the printing means.
In another preferred construction, the color printer system further comprises color characteristic information storing means for storing information on the color characteristic of the paper obtained by the paper color characteristic reading means,
wherein said color converting means reads out read out from said color characteristic information storing means when the color characteristic of a printing surface of the paper to be used in printing is stored in the color characteristic information storing means, and performs the color conversion processing of the color image object by using the color characteristic information and color characteristic of the printing means.
In another preferred construction, the paper color characteristic reading means is an optical sensor for detecting the color characteristic by receiving the reflection of a light irradiated on a paper.
In another preferred construction, the color printer system further comprises color characteristic information storing means for storing information on the color characteristic of said paper obtained by the paper color characteristic reading means,
wherein the paper color characteristic reading means is an optical sensor for detecting said color characteristic by receiving the reflection of a light irradiated on the paper, and
the color converting means performs the color conversion processing of the color image object by use of the color characteristic information read out from the color characteristic information storing means when the color characteristic of a printing surface of a paper to be used in printing is stored in the color characteristic information storing means.
Preferably, the paper color characteristic reading means is a scanner for optically scanning a printing surface of a paper.
Also, the color printer system further comprises color characteristic information storing means for storing information on the color characteristic of the paper obtained by the paper color characteristic reading means,
wherein the paper color characteristic reading means is a scanner for optically scanning a printing surface of a paper, and
the color converting means performs the color conversion processing of the color image object by use of the color characteristic information read out from the color characteristic information storing means when the color characteristic of a printing surface of a paper to be used in printing is stored in the color characteristic information storing means.
Other objects, features and advantages of the present invention will become clear from the detailed description given herebelow.
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Barlow John
Foley & Lardner
NEC Corporation
Stewart Jr. Charles W.
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