Facsimile and static presentation processing – Facsimile – Facsimile measuring – testing – or calibrating
Reexamination Certificate
1998-04-20
2001-01-09
Coles, Edward L. (Department: 2722)
Facsimile and static presentation processing
Facsimile
Facsimile measuring, testing, or calibrating
C358S001100, C358S504000, C399S039000, C399S072000
Reexamination Certificate
active
06172771
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an image forming system and a calibrating method for image forming conditions, and more particularly to an image forming system employing plural image forming apparatus in which the image forming conditions are determined according to the data read from a test pattern prepared in advance, and a calibrating method for image forming conditions for use therein.
2. Related Background Art
It is conventionally known to construct a system including plural units of image forming apparatus equipped with an image reader such as a color copying apparatus, thereby enabling to execute an ordinary copying operation in each copying apparatus and to output, by such copying apparatus, an image processed by a personal computer constituting an host equipment of the system. In such system, the different copying apparatus may output same images or may output respectively different images.
In such system, the calibration of the image forming conditions such as gradation correction, color correction, a gamma correcting table etc. with a test pattern has been executed by activating each image forming apparatus, preparing a particular pattern in each image forming apparatus, reading the density of such pattern by the respective image reader of such image forming apparatus and executing calibration of the image forming conditions such as gamma table of each image forming apparatus based on the result of such pattern reading. Such calibration is intended to improve the stability of the image quality.
In such conventional system, however, the images outputted from the respective image forming apparatus may be mutually different in the gradation characteristics etc. in case the image readers of such image forming apparatus have inherent fluctuations in the image reading characteristics or show such fluctuations by time-dependent changes. Such difference in the image reading characteristics of the reader does not constitute a major drawback in case each apparatus is individually used as the copying apparatus, but, in case the plural apparatus are utilized as printers, the commonly outputted images may be mutually different in gradation or in color.
SUMMARY OF THE INVENTION
In consideration of the foregoing, the object of the present invention is to provide an image forming system including plural image forming apparatus and enabling image forming in each of such image forming apparatus, the system being capable of comprehensively calibrating the image forming conditions of the respectively image forming apparatus and equalizing the gradation, color etc. of the images outputted therefrom, and a calibrating method for the image forming conditions adapted for use therein.
The above-mentioned object can be attained, according to the present invention, by an image forming system including plural image forming apparatus, comprising:
test image forming means for forming a test image in each of the plural image forming apparatus, on the basis of predetermined data;
reading means to be commonly used for reading the test image formed by the test image forming means, in each of the plural image forming apparatus; and
calibrating means for calibrating an image forming condition of each of the image forming apparatus, on the basis of the above-mentioned predetermined data and image data of the test image read by the reading means and corresponding to such image forming apparatus.
Other objects of the present invention, and the features thereof, will become fully apparent from the following description to be taken in conjunction with the attached drawings and from the appended claims.
REFERENCES:
patent: 5258783 (1993-11-01), Sasanuma et al.
patent: 5414531 (1995-05-01), Amemiya et al.
patent: 5434645 (1995-07-01), Usami
patent: 5489998 (1996-02-01), Yamada et al.
patent: 5566372 (1996-10-01), Ikeda et al.
patent: 5572330 (1996-11-01), Sasanuma
patent: 5583644 (1996-12-01), Sasanuma et al.
patent: 5608549 (1997-03-01), Usami
patent: 5697012 (1997-12-01), Sasanuma et al.
patent: 5760913 (1998-06-01), Falk
patent: 5933676 (1999-08-01), Ohno
patent: 7-298075 (1995-11-01), None
Atsumi Tetsuya
Ikeda Yuichi
Saito Yasuhiro
Sasanuma Nobuatsu
Canon Kabushiki Kaisha
Coles Edward L.
Fitzpatrick ,Cella, Harper & Scinto
Wallerson Mark
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