Systems and methods for rotating high addressability images
    91.
    发明授权
    Systems and methods for rotating high addressability images 有权
    旋转高可寻址性图像的系统和方法

    公开(公告)号:US06363177B1

    公开(公告)日:2002-03-26

    申请号:US09223325

    申请日:1998-12-30

    IPC分类号: G06K1500

    CPC分类号: G06T3/606

    摘要: Image rotation systems and methods optimally rotate high addressability binary images by transforming the high addressability image to a quasi-grayscale image having normal addressability. A degree of low-pass filtering may be used in conjunction with resampling the image in the process of generating the normal addressability image for rotation. The quasi-grayscale image is then rotated. The rotated quasi-grayscale image is then converted back to a high addressability binary image using a high addressability halftoning process. The systems and methods provide a process wherein high addressability binary images are rotated without introducing gray-level contours or pattern artifacts such as moiré. Further, the apparatus and method provide compact rotation of high addressability images. The density and edge integrity of the processed image are maintained without introducing false contours.

    摘要翻译: 图像旋转系统和方法通过将高可寻址性图像转换为具有正常寻址能力的准灰度图像来最佳地旋转高可寻址性二进制图像。 在生成用于旋转的正常可寻址性图像的过程中,可以结合使用重新采样图像来使用一定程度的低通滤波。 然后旋转准灰度图像。 然后使用高可寻址性半色调处理将旋转的准灰度图像转换回高可寻址性二进制图像。 这些系统和方法提供了一种过程,其中高可寻址性二进制图像被旋转而不引入灰度级轮廓或图案伪影,例如莫尔。 此外,该设备和方法提供了高可寻址性图像的紧凑旋转。 维持处理图像的密度和边缘完整性,而不引入假轮廓。

    Systems and methods for rotating high addressability images
    92.
    发明授权
    Systems and methods for rotating high addressability images 有权
    旋转高可寻址性图像的系统和方法

    公开(公告)号:US06301397B1

    公开(公告)日:2001-10-09

    申请号:US09223266

    申请日:1998-12-30

    IPC分类号: G06K932

    CPC分类号: G06T3/606 H04N1/3877

    摘要: Image rotation systems and methods optimally rotate high addressability binary images in a compact manner. High addressability bit pixels are clustered to form multi-bit pixels. The multi-bit pixel image is rotated +/−90°. A pixel mapping method is employed that realigns high addressability pixels within each target group of pixels in a manner that maintains edge integrity, maintains density, and does not introduce additional false contours. Information regarding neighboring pixel values is used to determine edge information about a given high addressability target pixel group. The edge information includes an edge slope and edge location of the high addressability target pixel group. Based on the rotation angle and the edge information of the pixel group, the target high addressability pixel group is mapped to a preferred pattern. After mapping to a preferred pattern, the high addressability pixel group is rotated.

    摘要翻译: 图像旋转系统和方法以紧凑的方式最佳地旋转高可寻址性二进制图像。 高可寻址性位像素被聚集以形成多位像素。 多位像素图像旋转+/- 90°。 使用像素映射方法,其以保持边缘完整性,维持密度并且不引入额外的假轮廓的方式重新对准每个目标像素组内的高可寻址性像素。 关于相邻像素值的信息用于确定关于给定的高可寻址性目标像素组的边缘信息。 边缘信息包括高可寻址性目标像素组的边缘斜率和边缘位置。 基于像素组的旋转角度和边缘信息,将目标高可寻址性像素组映射到优选图案。 在映射到优选图案之后,高可寻址性像素组被旋转。

    Method and apparatus for automatic image segmentation using template matching filters
    93.
    发明授权
    Method and apparatus for automatic image segmentation using template matching filters 有权
    使用模板匹配滤镜自动图像分割的方法和装置

    公开(公告)号:US06298151B1

    公开(公告)日:2001-10-02

    申请号:US09710797

    申请日:2000-11-09

    IPC分类号: G06K934

    CPC分类号: H04N1/40062

    摘要: The present invention is a method and apparatus for automatic image segmentation using template matching filters. The invention generally segments differing binary textures or structures within an input image by passing one or more structures while removing other structures. More particularly, the method and apparatus segment a stored binary image using a template matching filter that is designed to pass therethrough, for example, text regions while removing halftone regions.

    摘要翻译: 本发明是一种使用模板匹配滤波器自动图像分割的方法和装置。 本发明通常通过传递一个或多个结构同时移除其他结构来分割输入图像内的不同二进制纹理或结构。 更具体地,该方法和装置使用设计为通过其中的模板匹配滤波器(例如,文本区域)同时去除半色调区域来分割存储的二进制图像。

    Method and apparatus for compensating for raster position errors in
output scanners
    95.
    发明授权
    Method and apparatus for compensating for raster position errors in output scanners 失效
    用于补偿输出扫描仪中光栅位置误差的方法和装置

    公开(公告)号:US5900901A

    公开(公告)日:1999-05-04

    申请号:US461912

    申请日:1995-06-05

    CPC分类号: G02B26/127

    摘要: The present invention is a method and apparatus for compensating for position error inherent in a raster output scanning printing system by adjusting the intensity of image exposure to effect a correction in the output image. The invention is particularly well suited to compensate for position errors arising from a plurality of sources by first summing the errors and then applying a single compensating adjustment to the intensity of individual scan rasters based upon the position error thereof.

    摘要翻译: 本发明是一种通过调整图像曝光强度来补偿输出图像中的校正来补偿光栅输出扫描打印系统中固有的位置误差的方法和装置。 本发明特别适合于通过首先对错误进行求和来补偿由多个源产生的位置误差,然后基于其位置误差对单个扫描光栅的强度施加单个补偿调整。

    Method and apparatus for enhancing discharged area developed regions in
a tri-level pringing system
    96.
    发明授权
    Method and apparatus for enhancing discharged area developed regions in a tri-level pringing system 失效
    在三级印刷系统中增强排放区域开发区域的方法和装置

    公开(公告)号:US5479175A

    公开(公告)日:1995-12-26

    申请号:US118923

    申请日:1993-09-10

    摘要: The present invention is a an apparatus for enhancing the output along edges of discharged area developed regions in a tri-level imaging system employing a pulse width and position modulated signal ROS for exposure. The invention enables the identification and selective alteration of video data used to drive the ROS so as to extend the developed regions by a selected amount and eliminate digitization artifacts present in the image to be printed. The extension of the discharged area developed regions is accomplished by extending the width of, or adding separate, exposure pulses in adjacent areas to enable development within a portion of those regions.

    摘要翻译: 本发明是一种用于在采用脉冲宽度和位置调制信号ROS进行曝光的三电平成像系统中增强排出区域展开区域边缘的输出的装置。 本发明使得能够识别和选择性地改变用于驱动ROS的视频数据,以便将显影区域扩展所选择的量并消除存在于要打印的图像中的数字化伪影。 放电区域展开区域的延伸通过在相邻区域中扩展宽度或增加分开的曝光脉冲来实现,以使得在这些区域的一部分内能够发展。

    Non-integer image resolution conversion using statistically generated
look-up tables
    97.
    发明授权
    Non-integer image resolution conversion using statistically generated look-up tables 失效
    使用统计生成的查找表进行非整数图像分辨率转换

    公开(公告)号:US5387985A

    公开(公告)日:1995-02-07

    申请号:US170082

    申请日:1993-12-17

    CPC分类号: H04N1/40068 G06T3/40

    摘要: The present invention is a method and apparatus for converting the resolution of bitmap images, and more specifically, to the use of a template matching process to alter the resolution of digital images for printing or similar methods of rendition. The present invention uses statistically generated templates, implemented using look-up tables, to improve document appearance upon output by converting from an original or input spatial resolution to an output spatial resolution that is device dependent, and where there is a non-integer relationship between the input and output resolutions. The resulting image signals may then be utilized to control a scanning beam where the beam varies in intensity and duration according to the pulses used to control it.

    摘要翻译: 本发明是用于转换位图图像的分辨率的方法和装置,更具体地说,涉及使用模板匹配处理来改变用于打印的数字图像的分辨率或类似的再现方法。 本发明使用由查找表实现的统计学上生成的模板,通过从原始或输入空间分辨率转换为依赖于设备的输出空间分辨率而在输出时改善文档外观,并且其中存在非均匀关系 输入和输出分辨率。 然后,所得到的图像信号可用于控制扫描光束,其中光束根据用于控制它的脉冲的强度和持续时间而变化。

    Plywood suppression in ROS systems
    99.
    发明授权
    Plywood suppression in ROS systems 失效
    胶合板抑制在ROS系统

    公开(公告)号:US5089908A

    公开(公告)日:1992-02-18

    申请号:US735664

    申请日:1991-07-26

    IPC分类号: G02B26/12 H04N1/29

    CPC分类号: G02B26/123 H04N1/29

    摘要: A multiple diode laser array used in a ROS scanning system is modified to reduce the effects of undesirable spatial exposure variation at the surface of certain type of layered, semi-transparent photoreceptors. The spatial absorption variation is later manifested as a "plywooding" pattern formed on output prints derived from the exposed photoreceptor. The laser array is modified to form a merged scanning beam at the photoreceptor surface of two or more diode outputs, each output operating at a different wavelength than the other. In one embodiment, a plurality of diodes, each at a different wavelength, are sequentially addressed, and an image of each diode is scanned across the photoreceptor which results in an exposure distribution that would be similar to that formed by an incoherent beam.

    摘要翻译: 修改了在ROS扫描系统中使用的多重二极管激光器阵列,以减少某些类型的分层半透明感光体表面的不期望的空间曝光变化的影响。 空间吸收变化后来表现为在从曝光的感光体得到的输出印刷品上形成的“胶合”图案。 修改激光器阵列以在两个或更多个二极管输出的感光体表面处形成合并的扫描光束,每个输出的操作波长不同于另一个。 在一个实施例中,每个处于不同波长的多个二极管被顺序地寻址,并且每个二极管的图像跨越感光体扫描,导致与由非相干光束形成的曝光分布相似的曝光分布。