Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Reexamination Certificate
1997-07-09
2001-02-06
Le, N. (Department: 2861)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
C347S240000, C347S247000, C358S296000, C358S504000, C358S534000
Reexamination Certificate
active
06184915
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an image processing apparatus having a function for compensating for characteristics of an output device and an image processing method.
Recently, a color image forming apparatus which forms a color image on a recording medium on the basis of information of a color original image displayed on a color CRT display has been used in computerized offices. As examples of color image forming apparatuses, there are a copying machine and a printer adopting an electrophotographic method. Such copying machine and printer have excellent color reproduction, therefore, they are widely used in a field which requires faithful color reproduction of an original image, such as the field of designing and the field of image processing.
Further, the color gamut in chromaticness and lightness of an original image displayed on a color CRT display generally does not match the color gamut of a printed image formed by the above image forming apparatuses. Therefore, in order to match the color gamut of a color image inputted to a color image forming apparatus to the color gamut of an output color image, several techniques have been suggested. According to one technique, a test pattern which is outputted from a color image forming apparatus is read,-And characteristics of the image forming apparatus are compensated for. According to another technique, when the color gamut of an input color image signal is broader than that of a color image forming apparatus, the color gamut of the input color image signal is compressed within the color gamut of the image forming apparatus. By using the above techniques, an attempt is made to faithfully reproduce an original image.
There is no problem in a case where a single color image forming apparatus for outputting an image is used, however, a problem exists when a plurality of color image forming apparatuses are connected to a single computer by a computer network system. In such a network system, when an image is outputted from the plurality of color image forming apparatuses, each of the plurality of color image forming apparatuses may independently adjusted its output characteristics, however, the color image forming apparatuses may not be adjusted to each other and the computer. As a result, the plurality of color image forming apparatuses may form images having different color gamuts from each other.
Further, since an external device, such as a computer, can not determine the output characteristics of an image forming apparatus, there is a problem such that image processing suitable for the output characteristics of the image forming apparatus to be used is not performed.
SUMMARY OF THE INVENTION
The present invention has been made in consideration of the above situation, and has as its object to provide an image processing apparatus and method capable of providing parameters representing output characteristics of an image forming apparatus to an external device.
According to the present invention, the foregoing object is attained by providing an image processing apparatus for an output device which forms an image, the processing apparatus comprising: generation means for generating a pattern signal for forming a predetermined pattern image on a medium; determination means for determining an image forming parameter for the output device on the basis of density of the pattern image formed on the medium; and communication means for outputting the determined image forming parameter to an external computer, the communication means being capable of performing bidirectional communication.
According to the present invention, the foregoing object is also attained by providing an image processing method for an output device which forms an image, the method comprising: a generation step of generating a pattern signal for forming a predetermined pattern image on a medium; a determination step of determining an image forming parameter for the output device on the basis of density of the pattern image formed on the medium; and a communication step of performing bidirectional communication for outputting the determined image forming parameter to an external computer.
It is another object of the present invention to improve the calibration function of an output device of an image processing apparatus.
It is still another object of the present invention to improve efficiency of calibration processing of an output device of an image processing apparatus in a network system.
Other features and advantages of the present invention will be apparent from the following description taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof.
REFERENCES:
patent: 4888636 (1989-12-01), Abe
patent: 4959669 (1990-09-01), Haneda et al.
patent: 5053866 (1991-10-01), Johnson
patent: 5060059 (1991-10-01), Mori et al.
patent: 5107332 (1992-04-01), Chan
patent: 5136371 (1992-08-01), Savatier et al.
patent: 5142356 (1992-08-01), Usami et al.
patent: 5166786 (1992-11-01), Sakai et al.
patent: 5172224 (1992-12-01), Collette et al.
patent: 5175633 (1992-12-01), Saito et al.
patent: 5191361 (1993-03-01), Abe
patent: 5229864 (1993-07-01), Moronaga et al.
patent: 5237401 (1993-08-01), Koike et al.
patent: 5258783 (1993-11-01), Sasanuma et al.
patent: 5331441 (1994-07-01), Akuzawa et al.
patent: 5379126 (1995-01-01), Seto et al.
patent: 5386302 (1995-01-01), Kashihara et al.
patent: 5414531 (1995-05-01), Amemiya et al.
patent: 5434645 (1995-07-01), Usami
patent: 5446550 (1995-08-01), Maekawa et al.
patent: 5463700 (1995-10-01), Nakazawa
patent: 5489998 (1996-02-01), Yamada et al.
patent: 5566372 (1996-10-01), Ikeda et al.
patent: 5572330 (1996-11-01), Sasanuma
patent: 5608549 (1997-03-01), Usami
patent: 61-248668 (1986-11-01), None
Atsumi Tetsuya
Ikeda Yuichi
Saito Yasuhiro
Sasanuma Nobuatsu
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Le N.
Pham Hai C.
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