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公开(公告)号：JP4968902B2
公开(公告)日：2012-07-04
申请号：JP2006302129
申请日：2006-11-07
Applicant: キヤノン株式会社
Inventor： 陽子 佐藤
Abstract: PROBLEM TO BE SOLVED: To solve the problem that outline characters and the thickness of lines differ from color plates in a formed image when processing conditions differ from color to color in an image forming device. SOLUTION: The four-drum type MFP detects unshaded lines included by image data to be processed at Step S1201 and background colors of the unshaded lines at Step S1202. At Step S1203, by referring to a table on the basis of the size of the unshaded lines and the background colors, the printer computes the thickening amount of the unshaded lines in the image data, and thickens the picture elements on the basis of the thickening amount at Step S1204. COPYRIGHT: (C)2008,JPO&INPIT
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公开(公告)号：JP4274544B2
公开(公告)日：2009-06-10
申请号：JP2003400742
申请日：2003-11-28
Applicant: キヤノン株式会社
CPC classification number: H04N1/00222 , G06K15/02 , G06K15/027 , G06K15/1807 , H04N1/00015 , H04N1/00031 , H04N1/00045 , H04N1/0005 , H04N1/00061 , H04N1/00079 , H04N1/00087 , H04N1/00233 , H04N1/00244 , H04N1/0035 , H04N1/6055
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3.发明专利
公开(公告)号：JP4412733B2
公开(公告)日：2010-02-10
申请号：JP2005224595
申请日：2005-08-02
Applicant: キヤノン株式会社
CPC classification number: H04N1/54 , H04N1/233 , H04N1/2369 , H04N1/52
Abstract: When color materials of more than four colors are used, a signal for the amount of toner used within a range appropriate for the apparatus and toner characteristic is generated using a color separation table. However, a printer receives print data of various formats, such as image data separated into signal values of more than four colors, or image data of a special format to which a six-color separation table cannot be applied. Hence, an image signal representing a combination of colors is input. The sum of the signal values of colors in each pixel of the image signal is calculated and compared with a limit value. When the sum exceeds the limit value, the signal values of base colors are replaced with that of a spot color based on a replacement table for replacing the signal values of the base colors with that of the spot color.
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公开(公告)号：JP4380602B2
公开(公告)日：2009-12-09
申请号：JP2005217394
申请日：2005-07-27
Applicant: キヤノン株式会社
IPC: G03G21/02 , B41J29/00 , B41J29/42 , G03G21/00 , G06T1/00 , G06T11/60 , H04N1/387 , H04N1/46 , H04N1/60
CPC classification number: H04N1/54
Abstract: There is known a technique of inputting the contents of image data and the use purpose of a print material and automatically selecting a combination of color materials appropriate for them. However, it cannot be confirmed before printing whether improvement of image quality commensurate with the cost and labor to input contents information can be obtained. To solve this problem, the ratio of the amount of the color material of a spot color used to that of the color materials of process colors used in input image data is calculated. The recommendation grade of printing using the spot color is determined on the basis of the ratio. Further, display of the recommendation grade is controlled.
