公开(公告)号：US06513893B2

公开(公告)日：2003-02-04

申请号：US09977236

申请日：2001-10-16

申请人： Takahiro Esaki ,  Naomi Shirai ,  Hirokazu Ikeda ,  Toshihiro Asoh ,  Masaharu Oyama ,  Takanobu Kajikawa ,  Kenichi Kimori ,  Michiteru Shichiro

发明人： Takahiro Esaki ,  Naomi Shirai ,  Hirokazu Ikeda ,  Toshihiro Asoh ,  Masaharu Oyama ,  Takanobu Kajikawa ,  Kenichi Kimori ,  Michiteru Shichiro

IPC分类号： B41J2938

CPC分类号： B41J2/04546 ,  B41J2/04586 ,  B41J2/04588

摘要： In a head drive unit of ink-jet recorder and the like, for the purpose of reducing amount of data for head driving waveform and data processing time, a time data at a point where an electric current changes and an electric current data are stored in time data storage means and electric current data storage means, and the time data is compared with a count data of an address counter. The electric current data is then output to drive a head, when the data matches as a result of the comparison.

公开(公告)号：US06614943B1

公开(公告)日：2003-09-02

申请号：US09364458

申请日：1999-07-30

申请人： Hiroyuki Morimatsu ,  Michiteru Shichiro

发明人： Hiroyuki Morimatsu ,  Michiteru Shichiro

IPC分类号： G06K940

CPC分类号： H04N1/52

摘要： A multi-gradation image having a plurality of colors is binary coded by processing halftones in a pseudo manner. After the binary coding, an undesirable overlaying of colors on the image is eliminated so that image quality can be improved and also process load can be alleviated. A detailed process is this: Colors at a target pixel are binary coded, and the results are retained as data. When a color following the color already binary coded is processed, the retained data of the preceding color is referred to, thereby avoiding an undesirable composite black due to an overlaying of three primary colors on the same pixel. When the colors of an input image include black (K), this K is firstly binary coded at the target pixel, and when K is output, the other colors are halted outputting or a threshold value is set so that the other colors are not output. When K is not output, the other colors are binary coded in the order of higher density or higher visual sensitivity so that a quality image can be output.

摘要翻译： 通过以伪方式处理半色调，具有多种颜色的多灰度图像被二进制编码。 在二进制编码之后，消除了图像上不期望的颜色重叠，从而可以提高图像质量，并且还可以减轻处理负担。 一个详细的过程是：目标像素的颜色是二进制编码的，结果保留为数据。 当处理已经是二进制编码的颜色的颜色时，参考前一颜色的保留数据，从而避免了由于在相同像素上叠加三原色造成的不期望的复合黑色。 当输入图像的颜色包括黑色（K）时，该K首先在目标像素处被二进制编码，并且当输出K时，其它颜色被停止输出或者设置阈值以使得其它颜色不被输出 。 当不输出K时，其他颜色按照较高密度或更高的视觉灵敏度的顺序进行二进制编码，从而可以输出质量图像。