IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF
    31.
    发明申请
    IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF 有权
    图像形成装置及其控制方法

    公开(公告)号:US20100141972A1

    公开(公告)日:2010-06-10

    申请号:US12630297

    申请日:2009-12-03

    申请人: Tomokazu Yanai

    发明人: Tomokazu Yanai

    IPC分类号: H04N1/60 G06F3/12

    摘要: An image forming apparatus having a recording head with a plurality of printing elements comprising: a first quantization unit that performs a first quantization process on input image data to calculate N-level data by using a screen parameter corresponding to a screen condition of a target device; a conversion unit that converts the N-level data to M-level data (M>N); a configuring unit that configures printing density for each of the printing elements for each scan, using the M-level data; a second quantization unit that performs a second quantization process on the printing density for the scan of interest, using constraining information for the scan of interest; and a generating unit that generates the constraining information for the scan of interest, from the printing density configured for the preceding scan and the result of the second quantization process for the preceding scan.

    摘要翻译: 一种图像形成装置,具有具有多个打印元件的记录头,包括:第一量化单元,其对输入图像数据执行第一量化处理,以通过使用与目标设备的屏幕条件相对应的屏幕参数来计算N电平数据 ; 转换单元,将N电平数据转换为M电平数据(M> N); 使用M级数据配置用于每次扫描的每个打印元件的打印浓度的配置单元; 第二量化单元,使用用于感兴趣的扫描的约束信息对感兴趣的扫描的打印浓度执行第二量化处理; 以及生成单元,根据用于先前扫描的打印浓度和前一次扫描的第二量化处理的结果,生成用于感兴趣的扫描的约束信息。

    IMAGE PROCESSING APPARATUS, IMAGE FORMING APPARATUS, AND CONTROL METHOD THEREOF
    32.
    发明申请
    IMAGE PROCESSING APPARATUS, IMAGE FORMING APPARATUS, AND CONTROL METHOD THEREOF 有权
    图像处理装置,图像形成装置及其控制方法

    公开(公告)号:US20080316554A1

    公开(公告)日:2008-12-25

    申请号:US12022305

    申请日:2008-01-30

    IPC分类号: H04N1/46

    摘要: In order to form a high-quality image, upon execution of multi-pass printing using a printing head with a plurality of nozzles, an image processing apparatus calculates, using a scan duty setting unit (105), scan duty data for respective nozzles for each scan of the printing head in accordance with input image data. A halftone processor (108) generates a dot pattern to be formed by applying N-ary processing based on predetermined constraining condition information to the calculated scan duty data. A constraining condition information calculation unit (111) generates constraining condition information to be referred to by the halftone processor (108) at the time of the next scan. The constraining condition information is set so that the phase of a next dot pattern to be generated has an opposite phase relationship in a low frequency region with respect to the already printed dot pattern.

    摘要翻译: 为了形成高质量图像,在使用具有多个喷嘴的打印头执行多次打印时,图像处理装置使用扫描占空比设置单元(105)计算各喷嘴的扫描占空比数据 根据输入图像数据对打印头进行每次扫描。 半色调处理器​​(108)通过基于预定约束条件信息将N进制处理应用于计算出的扫描占空比数据,产生要形成的点阵图形。 约束条件信息计算单元(111)在下一次扫描时产生由半色调处理器​​(108)参考的约束条件信息。 约束条件信息被设置为使得相对于已经打印的点图案,要产生的下一点图案的相位在低频区域中具有相反的相位关系。