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    Exposure device and exposure method
    3.
    发明公开
    Exposure device and exposure method 有权
    Belichtungsvorrichtung und Belichtungsverfahren

    公开(公告)号：EP1486905A1

    公开(公告)日：2004-12-15

    申请号：EP04013528.7

    申请日：2004-06-08

    申请人： Noritsu Koki Co., Ltd.

    发明人： Ehara, Takuji Noritsu Koki Co, Ltd ,  Nakahara, Fumihiro Noritsu Koki Co, Ltd

    IPC分类号： G06K15/02

    CPC分类号： G06K15/02 ,  G06K2215/0071

    摘要： In an exposure device according to the present invention, a plurality of exposure bands each containing multiple dots is formed on photographic paper by repeating main scanning in a main scanning direction based on image data that contains multiple pixels and the transfer of the photographic paper in a sub scanning direction. Of the multiple dots contained in each of two continuous exposure bands, the mean value of the pixel levels of two pixels corresponding to two dots with the same positional relationship for the main scanning direction is calculated to derive interpolation data. Thus, the region between the two dots neighboring in the sub scanning direction on the photographic paper is exposed on the basis of the interpolation data.

    摘要翻译： 在根据本发明的曝光装置中，通过基于包含多个像素的图像数据在主扫描方向上重复主扫描而在照相纸上形成多个包含多个点的曝光带，并且将相纸的传送 副扫描方向。 在包含在两个连续曝光带中的每一个中的多个点中，计算与主扫描方向具有相同位置关系的两个点相对应的两个像素的像素级的平均值，以导出插值数据。 因此，基于内插数据来曝光相纸上副扫描方向相邻的两个点之间的区域。

    Just-in-time raster image assembly
    5.
    发明公开
    Just-in-time raster image assembly 有权
    即时Rasterbilderzeugung

    公开(公告)号：EP1258828A2

    公开(公告)日：2002-11-20

    申请号：EP02100504.6

    申请日：2002-05-16

    申请人： Agfa Corporation

    发明人： Catt, Jeremy C ,  Lucivero, Jeanne ,  White, Frank P.

    IPC分类号： G06K15/02

    CPC分类号： G06K15/02 ,  G06K2215/0071 ,  G06K2215/0077 ,  G06K2215/0082

    摘要： A print drive 41 is present in an electronic pre-press workflow that includes a raster image processor "RIP" 34 and an output device 46 to receive, store, combine and transmit raster data processed by the raster image processor 34. A prepress imposition scheme is created at the front end 40 and processed by the RIP 34 . Prepress imposition parameters 510-519 are used to generate a press sheet template image 102 , which is transmitted to the print drive 41 . The print drive 41 is capable of applying the press sheet template 102 to page raster data 94 on demand to form a multi-page press sheet assembly 98 so that raster images 94 of individual pages 90 remain independent. Among other benefits, this improves electronic prepress workflow by eliminating the need to generate combined raster images of multi-page press sheets to correct or modify a portion of the assembly.

    摘要翻译： 打印驱动器41存在于包括光栅图像处理器“RIP”34和输出设备46的电子预印刷工作流程中，输出设备46用于接收，存储，组合和发送由光栅图像处理器34处理的光栅数据。印前拼版方案 在前端40处被创建并由RIP 34处理。印前加印参数510-519用于生成印刷纸模板图像102，其被传送到打印驱动器41。打印驱动器41能够施加印刷机 纸张模板102根据需要页面光栅数据94以形成多页压页组件98，使得各个页面90的光栅图像94保持独立。 除了其他好处之外，这通过消除生成多页压页的组合光栅图像来校正或修改组件的一部分的需要来改善电子印前工作流程。

    Multi-level pixel density reduction for printers
    6.
    发明公开
    Multi-level pixel density reduction for printers 审中-公开
    像素密度减少用于打印机多层次图像

    公开(公告)号：EP0997840A3

    公开(公告)日：2002-10-23

    申请号：EP99308593.5

    申请日：1999-10-29

    申请人： Hewlett-Packard Company, A Delaware Corporation

    发明人： Wetchler, David M. ,  Bauman, Joseph H.

    IPC分类号： G06K15/00 ,  G06K15/02

    CPC分类号： G06K15/02 ,  G06K2215/0071 ,  G06K2215/0094

    摘要： A method of reducing pixel density in pixel array printers, alternatively termed depletion, uses information about a pixel when it is first available instead of having to recalculate that information at a later time. According to embodiments of the present invention, the process of identifying edge pixels for the purpose of depletion is performed during a halftoning process, in which every pixel in a pixel data array is examined. Pixels are classified as one of four possible pixel states: a blank pixel, a left/right edge pixel, a top/bottom edge pixel, or an area-fill pixel. The pixel state information is stored in a modified pixel data area. A predetermined pattern of filled and unfilled smaller pixels is identified with each pixel state. Each element in the modified pixel data array is mapped onto the smaller pixels according to the predetermined pattern and a printer is controlled according to the resulting pattern.

    BLACK TEXT PRINTING FROM PAGE DESCRIPTION LANGUAGES
    8.
    发明公开
    BLACK TEXT PRINTING FROM PAGE DESCRIPTION LANGUAGES 有权
    在页面描述语言格式的黑白文本打印PAGES

    公开(公告)号：EP1192588A1

    公开(公告)日：2002-04-03

    申请号：EP00936218.7

    申请日：2000-05-23

    申请人： Electronics for Imaging

    发明人： LERMANT, Pierre ,  DZIESIETNIK, Ghilad ,  KLIORIN, Victor

    IPC分类号： G06K15/02

    CPC分类号： G06K15/02 ,  G06K2215/0071 ,  G06K2215/0094

    摘要： A technique for printing black text on a colored background (44), in which the graphics (40) are broken down into three categories: text, polygons (also referred to as line drawing or vectors), and images (also referred to as bitmaps or raster data) when the incoming graphic information is a Page Description Language (PDL) data file (e.g. Adobe Postscript -PS- or Hewlett-Packard PCL). If the object is not a text object, it is processed in a normal manner. If the object (41) is a text object, a determination is made if the color of the object is black (42). If the object is not a black text object, it is processed in a normal manner. If the object is a black text object, special processing and rasterization techniques are applied. Thus, the invention exploits to advantage the fact that is possible in most PDL instances to treat black text differently from other black objects.

    Image forming apparatus having data compression/decompression system
    10.
    发明公开
    Image forming apparatus having data compression/decompression system 有权
    一种图像形成装置，其包括用于数据压缩和解压缩的系统

    公开(公告)号：EP1041508A3

    公开(公告)日：2000-12-13

    申请号：EP00106759.4

    申请日：2000-03-29

    申请人： Casio Computer Co., Ltd. ,  Casio Electronics Manufacturing Co., Ltd.

    发明人： Watanabe, Takeo, c/o Casio Computer Co., Ltd.

    IPC分类号： G06K15/02 ,  G06K15/00

    CPC分类号： G06K15/00 ,  G06K2215/0002 ,  G06K2215/0014 ,  G06K2215/0071

    摘要： A PC (5) supplies previously compressed print data to a printer (1). In the printer (1), image data are generated based on the supplied print data, and the generated image data are developed in an image memory (10). Since the print data are compressed, a compressor/decompressor (32) decompresses the print data. If available free area in the image memory (10) is insufficient for developing the image data, the compressor/decompressor (32) compresses the image data previously stored in the image memory (10), and the image memory (10) is refreshed with the compressed image data. The compressed image data are decompressed by the compressor/decompressor (32) before output to a printer engine (4). The compressor/decompressor (32) is available for decompressing the print data during a period since the data reception from the PC (5) until a sheet of paper (P) onto which an image is formed reaches a predetermined position. When the sheet of the paper (P) reaches the predetermined position, the compressor/decompressor (32) is switched to decompress only the image data in the image memory (10).