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    • 38. 发明授权
    • Printing method and printing apparatus
    • 印刷方法和印刷装置
    • US06364446B1
    • 2002-04-02
    • US09588177
    • 2000-06-07
    • Hisashi IshikawaHiroshi TajikaYuji KonnoHiroo InoueNorihiro KawatokoTetsuya EdamuraTetsuhiro Maeda
    • Hisashi IshikawaHiroshi TajikaYuji KonnoHiroo InoueNorihiro KawatokoTetsuya EdamuraTetsuhiro Maeda
    • B41J2205
    • G06K15/107H04N1/4015
    • A printing method capable of printing a high-quality image at a high speed and low cost and a corresponding printing apparatus are disclosed. In this printing apparatus, a shading-corrected mask pattern for multipass printing control in consideration of the characteristics of each printing element of a printhead is generated. The size of the mask pattern in the conveyance direction of the printing medium is set to be an integer multiple of the conveyance amount of the printing medium per scanning of the printhead. Image data masked using the mask pattern is transferred to the printhead and printed. Alternatively, the conveyance-direction size of the mask pattern for masking print data in accordance with each pass printing of multipass printing is set to be equivalent to the number of nozzles of an ink-jet printhead having a plurality of nozzles arrayed in the conveyance direction of the printing medium, and the mask pattern is dividedly used for each pass printing. Any error of the position of a dot printed on the printing medium by an ink droplet discharged from each nozzle is detected in units of nozzles. Printing may be performed using a mask pattern generated such that a printing element with a small error is frequently used in accordance with the detection result, or performed such that the positions of print data are exchanged.
    • 公开了能够以高速低成本打印高质量图像的打印方法和相应的打印装置。 在该打印装置中,生成考虑到打印头的每个打印元件的特性的用于多次打印控制的阴影校正的掩模图案。 将打印介质的输送方向上的掩模图案的尺寸设定为打印头每次打印的打印介质的输送量的整数倍。 使用掩模图案掩蔽的图像数据被传送到打印头并打印。 或者,根据多次打印的每次通过打印将用于掩蔽打印数据的掩模图案的输送方向尺寸设定为等于具有在输送方向排列的多个喷嘴的喷墨打印头的喷嘴数 的印刷介质,并且掩模图案被分割地用于每个通过印刷。 以喷嘴为单位检测由从每个喷嘴排出的墨滴印刷在打印介质上的点的位置的错误。 可以使用生成的掩模图案来执行打印,使得根据检测结果经常使用具有小错误的打印元件,或者执行以使得打印数据的位置被更换。
    • 40. 发明授权
    • Image processing apparatus, image printing apparatus, and control method of the apparatuses
    • 图像处理装置,图像打印装置和装置的控制方法
    • US06695434B2
    • 2004-02-24
    • US10209877
    • 2002-08-02
    • Yuji KonnoHiroshi TajikaNorihiro KawatokoTakayuki OgasaharaAtsuhiko Masuyama
    • Yuji KonnoHiroshi TajikaNorihiro KawatokoTakayuki OgasaharaAtsuhiko Masuyama
    • B41J221
    • H04N1/648H04N1/52
    • This invention provides an image processing apparatus capable of outputting a color image by reducing the information amount of each color component of the image by a method suited to the color component without deteriorating the quality of the image, and an image printing apparatus capable of printing an image without deteriorating the quality of the image, on the basis of received image data. Of color image data to be transmitted to the image printing apparatus (which uses, e.g., six colors Y, M, C, Bk, LC, and LM), the image processing apparatus quantizes colors (LC and LM) whose tone quality is important by a large number of gray levels (e.g., nine values), and does not compress these colors. The image processing apparatus quantizes colors (Y, M, C, and Bk) whose tone quality is not important by the number of gray levels (e.g., five values) by which the compression efficiency is improved, and then compresses these colors, thereby reducing the transmission data amount. The image printing apparatus prints the image of received image data by directly using uncompressed data and expanding compressed data.
    • 本发明提供一种图像处理装置,其能够通过利用适合于彩色分量的方法减少图像的每个颜色分量的信息量而不劣化图像质量来输出彩色图像;以及图像打印装置, 基于接收到的图像数据,图像不劣化图像的质量。 要发送到图像打印装置(其使用例如六种颜色Y,M,C,Bk,LC和LM)的彩色图像数据,图像处理装置对色调重要的颜色(LC和LM)进行量化 通过大量灰度级(例如9个值),并且不压缩这些颜色。 图像处理装置对色调质量不重要的颜色(Y,M,C和Bk)对压缩效率提高的灰度级数(例如,五个值)进行量化,然后压缩这些颜色,从而减少 传输数据量。 图像打印设备通过直接使用未压缩数据和扩展压缩数据来打印接收到的图像数据的图像。