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    • 96. 发明授权
    • High addressability error diffusion with minimum mark size
    • 具有最小标记大小的高可寻址性误差扩散
    • US5374997A
    • 1994-12-20
    • US922421
    • 1992-07-31
    • Reiner Eschbach
    • Reiner Eschbach
    • H04N1/40H04N1/405
    • H04N1/4052
    • High addressability image signals, each representing a pixel in an image, where the signal has one of a relatively large number of signal levels, are directed through an error diffusion quantization process, for the conversion of the signal to one of a relatively small number of levels. Each signal is modified by a correspondingly weighted error correction term signal or signals from previously processed image signals, thereby generating a modified image signal. This modified image signal is compared to a threshold to derive a preliminary output signal having a smaller number of levels. The preliminary output signal is directed to an output if it has the same level as the previous output signal. If the preliminary output signal does not have the same level as the previous output signal, the preliminary output signal is directed to the output only if the previous output signal was one of a contiguous group of a preselected number of like level signals. Otherwise, the previous output value is directed to the output. The actual output signal is then compared to the modified input signal to derive an error signal for the diffusion feedback loop that maintains gray density.
    • 每个表示图像中的像素的高可寻址性图像信号,其中信号具有相对大量的信号电平之一,被引导通过误差扩散量化处理,用于将信号转换成相对较小数目的信号 水平。 每个信号被相应加权的纠错项信号或来自先前处理过的图像信号的信号修改,由此产生经修改的图像信号。 将该修改后的图像信号与阈值进行比较以导出具有较小数量级别的初步输出信号。 如果初始输出信号具有与先前输出信号相同的电平,则将其输出到输出。 如果初步输出信号与先前的输出信号不具有相同的电平,则只有当前一个输出信号是预定数量的类似电平信号的连续组之一时,初步输出信号被引导到输出。 否则,以前的输出值被定向到输出。 然后将实际输出信号与修改的输入信号进行比较,以导出维持灰度密度的扩散反馈回路的误差信号。
    • 97. 发明授权
    • Converting between write-white, write-black and neutral bitmaps
    • 在写入白色,写入黑色和中性位图之间进行转换
    • US5258854A
    • 1993-11-02
    • US802791
    • 1991-12-06
    • Reiner Eschbach
    • Reiner Eschbach
    • B41J2/485G06K15/12G06T3/40H04N1/387H04N1/403H04N1/405H04N1/40
    • G06K15/128H04N1/4052G06K2215/0057
    • A bitmap to be prepared for printing by a printing process with a characteristic dilation or erosion artifact, is initially increased in resolution by a selected factor. The bitmapped image is then increased or decreased in size, at the increased resolution, by an amount necessary to compensate for the characteristic erosion or dilation of the printing process. The bitmap is rescanned, or reduced in resolution, to the original resolution of the image. The rescanned image is highly binary in appearance, but will include a number of gray level pixels in areas where it has been increased in size. Prior to printing, the pixel values are subjected to a quantizing process where gray level pixel values are reduced to binary values, preferably through an error diffusion process which operates only on gray pixels. The process of increasing the bitmap resolution may include a step of smoothing halfbitting.
    • 通过具有特征性扩张或侵蚀伪影的印刷工艺准备用于印刷的位图,最初以分辨率提高选定因子。 然后,以分辨率增加的尺寸增加或减小位图图像,以补偿印刷过程的特征侵蚀或扩张所需的量。 位图被重新扫描或分辨率降低到图像的原始分辨率。 重新扫描的图像在外观上是高度二进制的,但在尺寸增加的区域中将包含多个灰度级像素。 在打印之前,对像素值进行量化处理,其中灰度像素值被减小到二进制值,优选地通过只对灰色像素进行操作的误差扩散处理。 增加位图分辨率的过程可以包括平滑半点的步骤。
    • 99. 发明授权
    • Method and apparatus for including a security feature within a document
    • 在文件中包括安全特征的方法和装置
    • US08909775B2
    • 2014-12-09
    • US12336181
    • 2008-12-16
    • Gavan Leonard TredouxSteven J. HarringtonReiner EschbachEdward Chapman
    • Gavan Leonard TredouxSteven J. HarringtonReiner EschbachEdward Chapman
    • G06F15/173G06F21/60
    • G06F21/608
    • Disclosed are methods and apparatus for providing extended functionality to a networked device, the networked device connected in a network, as well as corresponding apparatus and computer-readable medium. The embodiments intercept data communications in which the networked device is a party, the data communications being intercepted by an interdictor, receive at the interdictor a subscription registration for notification of a networked device event which is to be altered, the subscription registration being received from an extension service, determine whether the data communications in which the networked device is a party corresponds to the subscription registration of the networked device event which is to be altered, and modify the data communications in which the networked device is a party to provide the extended functionality when the data communications are determined to correspond to the subscription registration of networked device event to be altered. According to one exemplary embodiment, the event is altered to include a security feature within a document associated with a print job.
    • 公开了用于向网络设备,连接在网络中的网络设备以及对应的设备和计算机可读介质提供扩展功能的方法和装置。 这些实施例拦截数据通信,其中网络设备是一方,数据通信被中断者拦截,在交叉转发器处接收用于通知被改变的联网设备事件的订阅注册,从 扩展服务,确定联网设备所属的一方的数据通信是否对应于要更改的联网设备事件的订阅注册,并修改网络设备为其提供扩展功能的数据通信 当数据通信被确定为对应于要改变的联网设备事件的订阅注册时。 根据一个示例性实施例,改变事件以包括与打印作业相关联的文档内的安全特征。