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公开(公告)号：US06172769B2
公开(公告)日：2001-01-09
申请号：US09131041
申请日：1998-08-06
IPC分类号： H04N152
CPC分类号： H04N1/40075
摘要： A method and an apparatus to descreen a halftoned picture takes into account the actual distribution of black or colors on the print without the need for scanning printed images but, rather, using only the printing decision matrix and the printer characteristics. For the purpose of laser printing, or more generally for reproduction on any printing device with a limited number of printing levels, a color or grayscale image has to be transformed into an array of printing decisions at each pixel of the output image. Sometimes this array is the only available representation of the original image. One may desire to reconstitute a good approximation of the original grayscale image from this array, for instance to print the picture on a printer with different characteristics from the printer for which the array was originally prepared, or to display it on a high resolution monitor. The method and apparatus to solve this problem in a way which take precise account of printer characteristics is described.
摘要翻译： 对半色调图像进行去屏的方法和装置考虑到打印件上的黑色或彩色的实际分布，而不需要扫描打印的图像，而是仅使用打印决定矩阵和打印机特性。 为了激光打印的目的，或更通常地，在具有有限数量的打印级别的任何打印设备上进行再现，颜色或灰度图像必须在输出图像的每个像素处被转换为打印决定的阵列。 有时这个数组是原始图像的唯一可用表示。 可能希望从该阵列重构原始灰度图像的良好近似，例如在具有与原始准备阵列的打印机不同的特征的打印机上打印图像，或者将其显示在高分辨率监视器上。 以描述打印机特性的精确方式来解决这个问题的方法和装置被描述。
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公开(公告)号：US6088123A
公开(公告)日：2000-07-11
申请号：US976248
申请日：1997-11-21
CPC分类号： H04N1/4051 , G06T1/0028
摘要： A method and apparatus for halftoning utilizes a truly aperiodic mask with memory requirements much smaller than the mask itself. The mask is constructed of several smaller compatible masks and a selector which selects between the smaller masks. In this way the computation of a large aperiodic mask is replaced by the computation of several much smaller masks. Using this technique, watermarks may be embedded for encrypting information in such a way that the quality of the image is not compromised.
摘要翻译： 用于半色调的方法和设备利用具有比掩码本身小得多的存储器要求的真正的非周期性掩模。 掩模由几个更小的兼容掩模和选择器构成，该选择器在较小的掩模之间进行选择。 以这种方式，通过几个更小的掩模的计算来代替大的非周期性掩模的计算。 使用这种技术，可以嵌入水印以加密信息，使得图像的质量不受损害。
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43.发明授权System and method for three-dimensional geometric modeling by extracting and merging two-dimensional contours from CT slice data and CT scout data 失效通过从CT切片数据和CT侦察数据提取和合并二维轮廓，进行三维几何建模的系统和方法
公开(公告)号：US6028907A
公开(公告)日：2000-02-22
申请号：US78522
申请日：1998-05-15
CPC分类号： A61B6/032 , A61B6/4085 , A61B6/488 , A61B6/505 , Y10S378/901
摘要： A computer system and method solve the problem of getting a useful three-dimensional representation of an object like the spine using a small amount of data. This is done by gathering three-dimensional data in the form of a set of 2D computer tomography (CT) slices of a patient's bones and a coaxial set of 2D CT scout images, which are digital two-dimensional X-ray images that can be produced by a CT scanner; extracting from each of these three-dimensional data sets a corresponding stack of 2D contours; and constructing a 3D geometric model of the object. The main features of spinal deformation are captured by integrating these two sets of three-dimensional data, and constructing from them a three-dimensional geometric model of the spine. Scouts are usually used to monitor CT scan acquisition. Here, they are also used as an essential source of data.
摘要翻译： 计算机系统和方法解决了使用少量数据来获得诸如脊柱的对象的有用的三维表示的问题。 这是通过以一组患者骨骼的2D计算机断层摄影（CT）切片和2D CT侦察图像的同轴组的形式收集三维数据来完成的，其是可以是数字二维X射线图像 由CT扫描仪产生; 从这些三维数据集中的每一个提取相应的2D轮廓的堆叠; 并构建对象的3D几何模型。 通过整合这两组三维数据来捕获脊柱变形的主要特征，并从中构建脊柱三维几何模型。 侦察兵通常用于监测CT扫描采集。 在这里，它们也被用作数据的重要来源。
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公开(公告)号：US5917951A
公开(公告)日：1999-06-29
申请号：US943881
申请日：1997-10-03
CPC分类号： H04N1/405 , H04N1/4051
摘要： A technique combines most of the advantages of both blue noise and clustering in generating a clustered aperiodic mask and using it in a dither array algorithm for halftoning. The method of halftoning of grey scale images utilizes a pixel-by-pixel comparison of the image against a clustered aperiodic mask in which the clustered aperiodic mask is comprised of a partly random and partly deterministic single valued function which is designed to produce visually pleasing dot configurations when thresholded at any level of grey.
摘要翻译： 一种技术将蓝噪声和聚类的大多数优点结合在生成聚类非周期性掩模中，并将其用于抖动阵列算法进行半色调处理。 灰度图像的半色调的方法利用图像与聚集的非周期性掩模的逐像素比较，其中聚集的非周期性掩模由部分随机和部分确定性的单值函数组成，其被设计为产生视觉上令人满意的点 在任何灰度级别进行阈值处理时的配置。
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公开(公告)号：US09614998B2
公开(公告)日：2017-04-04
申请号：US14287089
申请日：2014-05-26
CPC分类号： H04N1/405 , G06K15/1881 , H04N1/4052 , H04N1/4053
摘要： A method is disclosed. The method includes generating a halftone screen using a Direct Multi-bit Search Screen Algorithm (DMSSA) to optimize a halftone pattern at each gray level.
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公开(公告)号：US20140240803A1
公开(公告)日：2014-08-28
申请号：US13777550
申请日：2013-02-26
IPC分类号： H04N1/46
CPC分类号： G03G15/556 , G06K15/12 , G06K15/1823 , H04N1/00127 , H04N1/00167 , H04N1/00188
摘要： A method is disclosed. The method includes estimating a quantity of toner to be used to print a job at a printer by calculating a buildup of toner at edges of data on each page of the print job.
摘要翻译： 公开了一种方法。 该方法包括通过计算打印作业的每页上的数据边缘处的调色剂积累来估计用于在打印机上打印作业的调色剂量。
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公开(公告)号：US20140233069A1
公开(公告)日：2014-08-21
申请号：US13773017
申请日：2013-02-21
IPC分类号： G06K15/02
CPC分类号： G06K15/1881 , H04N1/4051
摘要： A method is disclosed. The method includes generating a set of points via energy minimization to implement halftone seed pattern.
摘要翻译： 公开了一种方法。 该方法包括通过能量最小化产生一组点以实现半色调种子图案。
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公开(公告)号：US20130265611A1
公开(公告)日：2013-10-10
申请号：US13440820
申请日：2012-04-05
IPC分类号： H04N1/405
CPC分类号： H04N1/4053
摘要： A method is disclosed. The method includes generating a Continuous Tone Image (CTI) with all pixel values same as a first gray level, generating an initial Half Tone Image (HTI) with all pixel values equal to minimum absorptance level and computing a change in pixel error for a first pixel. The change in pixel error is computed by identifying a first pixel indicated in a valid pixel map, toggling the first pixel with all the possible output states and swapping the first pixel with all neighbor pixels only if the stacking constraint is satisfied, updating the HTI with the maximum error decrease operation and continue to next pixel location till the end criteria is met.
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公开(公告)号：US20130176599A1
公开(公告)日：2013-07-11
申请号：US13345466
申请日：2012-01-06
申请人： Kartheek Chandu , Miket Stanich , Chai Wah Wu , Barry M. Trager
发明人： Kartheek Chandu , Miket Stanich , Chai Wah Wu , Barry M. Trager
IPC分类号： H04N1/405
CPC分类号： H04N1/4051 , H04N1/40087
摘要： A method is disclosed. The method includes generating a Continuous Tone Image (CTI) with all pixel values same as the first gray level and an initial Half Tone Image (HTI) with all pixel values equal to minimum absorptance level, computing a change in pixel error by toggling with all the possible output states and swapping with all neighbor pixels only if the stacking constraint is satisfied, updating the HTI with the maximum error decrease operation and continue to next pixel location till the end criteria is met. Once the end criteria is met, the updated HTI is saved as a final halftone screen for that gray level and copied as the initial HTI for the next gray level along with CTI pixel values updated to the next gray level till the final gray value is reached.
摘要翻译： 公开了一种方法。 该方法包括产生具有与第一灰度级相同的所有像素值的连续色调图像（CTI）和具有等于最小吸收水平的所有像素值的初始半色调图像（HTI），通过全部切换来计算像素误差的变化 可能的输出状态和所有相邻像素的交换只有在满足堆叠约束的情况下，用最大误差减少操作更新HTI并继续到下一个像素位置，直到满足结束标准。 一旦满足结束标准，更新的HTI被保存为该灰度级的最终半色调屏幕，并被复制为用于下一个灰度级的初始HTI，以及更新到下一个灰度级的CTI像素值，直到达到最终灰度值 。
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公开(公告)号：US20130176578A1
公开(公告)日：2013-07-11
申请号：US13345456
申请日：2012-01-06
IPC分类号： H04N1/60
CPC分类号： H04N1/4051
摘要： A method is disclosed. The method includes generating a seed pattern which ensures one dot per column, computing an auto correlation function and performing pixel error processing. Pixel error processing includes performing multiple operations during each iteration to create visually pleasing halftone mask patterns which follow a one dot per column constraint.
摘要翻译： 公开了一种方法。 该方法包括生成保证每列一个点的种子图案，计算自相关函数并执行像素误差处理。 像素误差处理包括在每次迭代期间执行多个操作以创建视觉上令人满意的半色调掩模图案，其遵循每列约束的一个点。
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