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    Method and apparatus for halftoning of images in a printer
    2.
    发明授权
    Method and apparatus for halftoning of images in a printer 失效
    在打印机中对图像进行半色调的方法和装置

    公开(公告)号：US5949964A

    公开(公告)日：1999-09-07

    申请号：US877343

    申请日：1997-06-17

    申请人： Scott C. Clouthier ,  Douglas Heins ,  Brian E. Hoffmann ,  James R. Nottingham ,  Gary L. Vondran, Jr.

    发明人： Scott C. Clouthier ,  Douglas Heins ,  Brian E. Hoffmann ,  James R. Nottingham ,  Gary L. Vondran, Jr.

    IPC分类号： G06K15/02 ,  G06T5/00 ,  H04N1/40 ,  H04N1/405 ,  G06F15/00

    CPC分类号： H04N1/405 ,  G06K15/02 ,  H04N1/40062 ,  G06K2215/0014 ,  G06K2215/0065 ,  G06K2215/0094

    摘要： A method for halftoning an image to be rendered onto a media sheet includes the steps of: classifying data portions of a received data stream into one of plural image types, each image type to be subjected to a particular halftone procedure; assigning to each data portion of a common image type, a common identifier and then converting the data portions into a raster representation; subjecting segments of the raster representation to individualized halftone procedures, each segment of the raster representation that is assigned a common identifier being subjected to an identical halftone procedure; and rendering the raster representation onto a media sheet, subsequent to the halftone process. The apparatus for performing the halftone method places the halftone operation subsequent to the rasterization operation and thereby avoids anomalies which occurred in the prior art. Further, the apparatus enables halftone tables which are utilized during the halftone procedure to be altered so as to enable improvements to the halftone method.

    摘要翻译： 将要呈现到介质片上的图像进行半色调的方法包括以下步骤：将接收到的数据流的数据部分分类为多个图像类型中的一个，每个图像类型要进行特定的半色调处理; 向公共图像类型的每个数据部分分配公共标识符，然后将数据部分转换为光栅表示; 对光栅表示的段进行个性化的半色调处理，对被分配有相同的半色调过程的公共标识符的光栅表示的每个段进行分类; 以及在半色调处理之后将光栅表示呈现在介质片上。 用于执行半色调方法的装置在光栅化操作之后放置半色调操作，从而避免现有技术中发生的异常。 此外，该设备使得可以改变在半色调过程期间使用的半色调表，以便能够改进半色调方法。

    Transmitting a document
    3.
    发明授权
    Transmitting a document 有权
    传送文件

    公开(公告)号：US08966256B2

    公开(公告)日：2015-02-24

    申请号：US13460334

    申请日：2012-04-30

    申请人： Randall Edward Grohs ,  Brian E. Hoffmann ,  Steven J. Simske

    发明人： Randall Edward Grohs ,  Brian E. Hoffmann ,  Steven J. Simske

    IPC分类号： H04L29/00

    CPC分类号： H04L9/3226 ,  G06Q10/06 ,  G06Q10/10 ,  H04L9/088 ,  H04L9/3268 ,  H04L63/0428 ,  H04L63/0823 ,  H04L2209/60

    摘要： A method of transmitting a document from a computing device to a printing device using a document server comprising, at the server, receiving user credentials from a user of an authorized computing device, receiving encrypted data defining the document from the authorized computing device, receiving information indicating the intended recipients of the data, receiving user credentials from an authorized printing device, and delivering the encrypted data to an authorized recipient.

    摘要翻译： 一种使用文档服务器将文档从计算设备发送到打印设备的方法，包括在服务器处从授权的计算设备的用户接收用户凭证，从授权的计算设备接收定义文档的加密数据，接收信息 指示数据的预期接收者，从授权的打印设备接收用户凭证，以及将加密的数据传递给授权的接收者。

    Adaptive image resolution enhancement technology
    4.
    发明授权
    Adaptive image resolution enhancement technology 失效
    自适应图像分辨率增强技术

    公开(公告)号：US06178011B1

    公开(公告)日：2001-01-23

    申请号：US09046995

    申请日：1998-03-24

    申请人： Qian Lin ,  Brent M. Bradburn ,  Brian E. Hoffmann

    发明人： Qian Lin ,  Brent M. Bradburn ,  Brian E. Hoffmann

    IPC分类号： H04N1405

    CPC分类号： H04N1/4055 ,  G06T3/403

    摘要： An Adaptive Image Resolution Enhancement Technology (IRET) process and apparatus is described to improve halftone imaging by changing ordered halftone screen resolution according to the content of the image and managing these changes based on image content. The Adaptive IRET halftoning technique maximizes the artifact reducing properties of coarser ordered screens, while minimizing the loss of rendered detail in image areas having high spatial frequency. IRET may utilize a mixture of any ordered halftone screen (e.g. clustered-dot dither, line screen, etc.) to generate halftone dots with a number of levels, and any dispersed halftone screen to generate additional levels for the ordered halftone dots. For some printing technologies, it is preferable to minimize printing artifacts by generating coarser halftone screens, rather than finer halftone screens. Coarser screening, however, means that details in the image, text, and line art will not be rendered well. Adaptive IRET uses an activity index to change its ordered halftone screen resolution according to the content of the image. To render a page with a mixture of text, line art, area fill, and photograph, it is preferable to render the “busy” areas, such as text, line art, and edge regions in a photograph, with a higher resolution screen. On the other hand, smooth areas, such as area fill and non-edge regions in a photograph, are better rendered with a lower resolution screen.

    摘要翻译： 描述了自适应图像分辨率增强技术（IRET）处理和装置，以通过根据图像的内容改变有序半色调屏幕分辨率并基于图像内容来管理这些改变来改进半色调成像。 自适应IRET半色调技术最大限度地减少较粗序列屏幕的伪像降低属性，同时最大限度地减少具有高空间频率的图像区域中渲染细节的损失。 IRET可以利用任何有序半色调屏幕（例如聚集点抖动，线屏幕等）的混合来产生具有多个电平的半色调点，以及任何分散的半色调屏幕，以产生有序半色调点的附加电平。 对于一些印刷技术，优选的是通过产生较粗的半色调屏幕而不是更细的半色调屏幕来最小化印刷伪影。 然而，较粗糙的筛选意味着图像，文本和线条艺术中的细节将不会很好地呈现。 自适应IRET使用活动指数根据图像的内容来改变其有序的半色调屏幕分辨率。 要渲染具有文本，线条，区域填充和照片混合的页面，最好使用更高分辨率的屏幕在照片中呈现诸如文本，线条和边缘区域的“繁忙”区域。 另一方面，照片中的区域填充和非边缘区域等平滑区域更好地用较低分辨率的屏幕渲染。

    Software-based procedure for conversion of a scalable font character bitmap to a gray level bitmap
    5.
    发明授权
    Software-based procedure for conversion of a scalable font character bitmap to a gray level bitmap 失效
    用于将可缩放字体字符位图转换为灰度位图的基于软件的过程

    公开(公告)号：US5657430A

    公开(公告)日：1997-08-12

    申请号：US612037

    申请日：1996-03-07

    申请人： Marcus A. Smith ,  Brian E. Hoffmann ,  Jeffrey L. Trask

    发明人： Marcus A. Smith ,  Brian E. Hoffmann ,  Jeffrey L. Trask

    IPC分类号： B41J2/485 ,  G06K15/02 ,  H04N1/40 ,  C06K15/00

    CPC分类号： H04N1/40075 ,  G06K15/02 ,  H04N1/40068 ,  G06K2215/0028 ,  G06K2215/004

    摘要： A binary pixel bitmap image is converted to a multi-bit gray level pixel image at a level of resolution that is reproducible by a laser printer. An edge smoothing procedure is employed by the laser printer and comprises the steps of: deriving from font contours of the image, a binary pixel bitmap of the image at a higher level of resolution than is output by the laser printer; logically stepping an m.times.n pixel window across pixel groups of the higher resolution binary pixel bitmap and, at each step, determining a count of pixels of one binary kind that are present within the pixel window; converting each count of pixels to a corresponding modulation signal; and controlling a laser in the laser printer in accordance with each modulation signal so that an edge smoothed gray level image is produced at the printer's level of output resolution.

    摘要翻译： 二进制像素位图图像以可由激光打印机再现的分辨率水平转换为多位灰度级像素图像。 激光打印机采用边缘平滑处理，包括以下步骤：以比激光打印机输出的分辨率更高的分辨率的图像的二进制像素位图从图像的字体轮廓获得; 在较高分辨率二进制像素位图的像素组之间逻辑地步进m×n像素窗口，并且在每个步骤中，确定存在于像素窗口内的一种二进制类型的像素的数量; 将每个像素数转换成相应的调制信号; 以及根据每个调制信号控制激光打印机中的激光，使得在打印机的输出分辨率级别产生边缘平滑灰度图像。

    Apparatus and method for enhancing learning ability and behavior for a computer peripheral device
    6.
    发明授权
    Apparatus and method for enhancing learning ability and behavior for a computer peripheral device 有权
    用于增强计算机外围设备的学习能力和行为的装置和方法

    公开(公告)号：US06826629B2

    公开(公告)日：2004-11-30

    申请号：US09947983

    申请日：2001-09-06

    申请人： Brian E. Hoffmann ,  Loay Abu-Husein ,  David A. Martz

    发明人： Brian E. Hoffmann ,  Loay Abu-Husein ,  David A. Martz

    IPC分类号： G06F300

    CPC分类号： G06F3/1206 ,  G06F3/1244 ,  G06F3/1247 ,  G06F3/1288

    摘要： A computer peripheral device learning apparatus includes a host computer, a communication path, and a computer peripheral device. The host computer includes a peripheral device driver configured to generate an output job. The computer peripheral device communicates with the host computer via the communication path. The computer peripheral device is configured to generate an output job in a first output job format. Furthermore, the computer peripheral device is operative to receive instructions from an external source on how to generate an output job in a second output job format. A method is also provided.

    摘要翻译： 计算机外围设备学习装置包括主计算机，通信路径和计算机外围设备。 主计算机包括被配置为产生输出作业的外围设备驱动器。 计算机外围设备经由通信路径与主机通信。 计算机外围设备被配置为以第一输出作业格式生成输出作业。 此外，计算机外围设备可操作以从外部源接收关于如何以第二输出作业格式生成输出作业的指令。 还提供了一种方法。

    Cooperative rasterization of print data in an enterprise network
    7.
    发明授权
    Cooperative rasterization of print data in an enterprise network 有权
    企业网络中打印数据的协同光栅化

    公开(公告)号：US07576880B2

    公开(公告)日：2009-08-18

    申请号：US10701144

    申请日：2003-11-03

    申请人： Robert D. Christiansen ,  Scott C. Clouthier ,  Brian E. Hoffmann

    发明人： Robert D. Christiansen ,  Scott C. Clouthier ,  Brian E. Hoffmann

    IPC分类号： G06F3/12 ,  G06F5/14

    CPC分类号： H04N1/00222 ,  G06F3/122 ,  G06F3/1247 ,  G06F3/1285 ,  G06K15/02 ,  G06K15/1859

    摘要： Systems and methods for cooperative rasterization of print data in an enterprise network are described. In one aspect, a primary printer rasterizes a portion of a print job to input raster bits into a raster buffer associated with the primary printer. During print job processing operations, the primary printer identifies a potential underflow condition of the raster buffer. Thus, the primary printer communicates an un-rasterized portion of the print job to a secondary printer for the secondary printer to rasterize—the primary printer not rasterizing the un-rasterized portion. Subsequently, the primary printer receives raster bits corresponding to the un-rasterized portion from the secondary printer. The primary printer prints all of the raster bits corresponding to the print job.

    摘要翻译： 描述了企业网络中打印数据的协同光栅化的系统和方法。 在一个方面，主打印机光栅化打印作业的一部分以将光栅位输入到与主打印机相关联的光栅缓冲器中。 在打印作业处理操作期间，主打印机识别光栅缓冲器的潜在下溢条件。 因此，主打印机将打印作业的未光栅化部分传送到用于次打印机的辅助打印机以光栅化 - 主打印机不光栅化未光栅化部分。 随后，主打印机从辅助打印机接收对应于未光栅化部分的光栅位。 主打印机打印与打印作业相对应的所有光栅位。

    Configurable data processing pipeline
    8.
    发明授权
    Configurable data processing pipeline 失效
    可配置数据处理流水线

    公开(公告)号：US5852742A

    公开(公告)日：1998-12-22

    申请号：US878883

    申请日：1997-06-17

    申请人： Gary L. Vondran, Jr. ,  James R. Nottingham ,  Scott C. Clouthier ,  Douglas Heins ,  Brian E. Hoffmann

    发明人： Gary L. Vondran, Jr. ,  James R. Nottingham ,  Scott C. Clouthier ,  Douglas Heins ,  Brian E. Hoffmann

    IPC分类号： B41J29/38 ,  B41J5/30 ,  G06F3/12 ,  G06F7/00 ,  G06K15/02 ,  G06T1/20 ,  H04N1/40 ,  H04N1/411 ,  G06F9/00

    CPC分类号： G06K15/02 ,  G06K2215/0002 ,  G06K2215/0011 ,  G06K2215/0094

    摘要： A print data processing pipeline for use in a color electrophotographic printer optimizes print quality and minimizes memory usage by separately processing lossy and lossless print data. Lossy print data may include print data for images and lossless print data may include print data for text, line art, and graphics. Partitioning print data into lossy and lossless components allows application of the print data compression operations optimized for each type of print data. High compression ratios can be achieved on lossy print data by applying visually lossless compression operations designed for the lossy print data. In addition, high compression ratios can be achieved on the lossless print data by applying lossless compression operations designed for the lossless print data. A merge unit combines the lossy and lossless print data streams after decompression to reconstruct the original image. Placement of the color space conversion operation and the halftone operation relative to the merge operation, further optimizes the print quality while minimizing memory usage. The print data processing pipeline includes a direct memory access controller which has the capability to allow print data to be selectively directed to the lossy or lossless compressor/decompressor, the color space converter, or the merge unit. Feedback paths within the print data processing pipeline allow the results of the various operations performed to be returned to the direct memory access controller for further processing or storage in system memory. Bypass paths in the color space converter and halftone unit allow print data to be selectively directed around these operations. These capabilities allow configuration of the print data processing pipeline to perform a multitude of permutations of print data processing operations optimized for the print data.

    摘要翻译： 用于彩色电子照相打印机的打印数据处理流水线通过单独处理有损耗和无损打印数据来优化打印质量并最小化存储器使用。 有损打印数​​据可以包括用于图像的打印数据和无损打印数据可以包括用于文本，线条图形和图形的打印数据。 将打印数据分成有损和无损的组件，可以应用针对每种打印数据优化的打印数据压缩操作。 通过为有损打印数​​据应用视觉无损压缩操作，可以在有损打印数​​据上实现高压缩比。 此外，通过为无损打印数据应用无损压缩操作，可以在无损打印数据上实现高压缩比。 合并单元在解压缩之后组合有损和无损打印数据流以重建原始图像。 相对于合并操作，色彩空间转换操作和半色调操作的放置进一步优化打印质量，同时最小化存储器使用。 打印数据处理流水线包括直接存储器访问控制器，其具有允许打印数据被选择性地指向有损或无损压缩器/解压缩器，色空间转换器或合并单元的能力。 打印数据处理流水线内的反馈路径允许执行的各种操作的结果返回到直接存储器访问控制器，以便进一步处理或存储在系统存储器中。 彩色空间转换器和半色调单元中的旁路路径允许打印数据选择性地围绕这些操作。 这些功能允许配置打印数据处理流水线，以执行针对打印数据优化的打印数据处理操作的多种排列。