公开(公告)号：US20080130055A1

公开(公告)日：2008-06-05

申请号：US11565434

申请日：2006-11-30

申请人： Shen-Ge Wang ,  Robert P. Loce

发明人： Shen-Ge Wang ,  Robert P. Loce

IPC分类号： G06K15/00

CPC分类号： H04N1/4058 ,  H04N1/52

摘要： Disclosed herein is a method and apparatus for moiré-free color halftone printing with up to four color image separations. The method and apparatus utilize a plurality of non-orthogonal halftone screens to produce outputs that are moiré free and form uniform periodic rosettes. The method and apparatus provide for defining a first and a second color halftone screen fundamental frequency vector for each of three halftone screens such that the halftone screen set output forms uniform hexagonal rosettes; then defining a fourth color halftone screen where a first fundamental vector of the fourth screen shares a fundamental frequency vector with one of said three halftone screens and a second fundamental frequency vector of the fourth screen shares a fundamental frequency vector with a different one of said three color halftone screens.

摘要翻译： 本文公开了一种用于无摩擦色彩半色调打印的方法和装置，其具有多达四个彩色图像分离。 该方法和装置利用多个非正交半色调筛网产生无波纹的输出并形成均匀的周期性玫瑰花结。 该方法和装置提供了为三个半色调屏幕中的每一个定义第一和第二颜色半色调网屏基本频率矢量，使得半色调屏幕组输出形成均匀的六边形玫瑰花结; 然后定义第四色调网屏，其中第四屏幕的第一基本矢量与所述三个半色调屏幕中的一个共享基本频率矢量，并且第四屏幕的第二基频矢量与所述三个网版的不同的一个共享基本频率矢量 彩色半色调屏幕

公开(公告)号：US07379588B2

公开(公告)日：2008-05-27

申请号：US10721138

申请日：2003-11-25

申请人： Robert P. Loce ,  Yeqing (Juliet) Zhang ,  Gaurav Sharma

发明人： Robert P. Loce ,  Yeqing (Juliet) Zhang ,  Gaurav Sharma

IPC分类号： G06K9/00

CPC分类号： H04N1/387

摘要： Methods and apparatus for spectrally-encoding plural source images and for providing the spectrally-encoded plural source images in a composite image, for rendering the composite image in a physical form, or for recovering a normalized version of an encoded source image from the rendered composite image such that the recovered source image is made distinguishable as a normalized color image.

摘要翻译： 用于频谱编码多个源图像并用于在合成图像中提供频谱编码的多个源图像的方法和装置，用于以物理形式呈现合成图像，或用于从所渲染的复合物恢复编码源图像的归一化版本 图像使得恢复的源图像被做为可区分为归一化的彩色图像。

公开(公告)号：US07155068B2

公开(公告)日：2006-12-26

申请号：US10268271

申请日：2002-10-09

申请人： Yeqing (Juliet) Zhang ,  Gaurav Sharma ,  Robert P. Loce ,  Steven J. Harrington

发明人： Yeqing (Juliet) Zhang ,  Gaurav Sharma ,  Robert P. Loce ,  Steven J. Harrington

IPC分类号： G06K9/36

CPC分类号： H04N1/4446

摘要： Methods and apparatus for spectrally-encoding plural source images and for providing the spectrally-encoded plural source images in a composite image, for rendering the composite image in a physical form, or for recovering at least one of the encoded source images from the rendered composite image such that the recovered source image is made distinguishable. The composite image is generated using an image-dependent dynamic range determination so as to provide a maximum usable contrast in a recovered source image.

摘要翻译： 用于频谱编码多个源图像并用于在合成图像中提供频谱编码的多个源图像的方法和装置，用于以物理形式呈现合成图像，或用于从所渲染的复合物中恢复至少一个编码源图像 使得恢复的源图像是可区分的。 使用依赖于图像的动态范围确定来生成合成图像，以便在恢复的源图像中提供最大可用对比度。

公开(公告)号：US07046397B2

公开(公告)日：2006-05-16

申请号：US10694494

申请日：2003-10-27

申请人： Robert P. Loce ,  Clara Cuciurean-Zapan

发明人： Robert P. Loce ,  Clara Cuciurean-Zapan

IPC分类号： H04N1/40

CPC分类号： H04N1/4092 ,  G06K15/1826 ,  G06T5/002 ,  G06T5/003 ,  G06T5/30 ,  G06T2207/20192 ,  G06T2207/30144 ,  G06T2207/30176 ,  H04N1/58

摘要： Selective edge softening and selective edge dithering is introduced into an image representation to improve local control where halo problems are expected. Selective areas of dilation are isolated and separately dithered or halftoned, the result of which is then swapped back into or substituted for the stored original image. In this manner misregistration and color plane-to-plane interactions can be compensated for in plural image forming station architecture systems. The same technique is also valuable in monochrome systems as an aid to overcoming edge displacement and slow toner problems when the selective edge softening is selectively applied to edges which are in particular perpendicular to the fast scan direction.

摘要翻译： 选择边缘柔化和选择性边缘抖动被引入到图像表示中以改善局部控制，其中预期光晕问题。 选择性扩张区域是隔离的，并且分开地抖动或半色调，然后将其结果交换回或代替所存储的原始图像。 以这种方式，在多个图像形成站架构系统中可以补偿不对准和彩色平面到平面的相互作用。 当选择性边缘软化选择性地施加到特别是垂直于快速扫描方向的边缘时，相同的技术在单色系统中也是有价值的，以帮助克服边缘位移和缓慢的调色剂问题。

公开(公告)号：US07038816B2

公开(公告)日：2006-05-02

申请号：US10812545

申请日：2004-03-29

申请人： R. Victor Klassen ,  Stephen C. Morgana ,  Robert P. Loce ,  Michael Branciforte ,  Daniel R. Maurer ,  Michael J. Martin ,  Robert M. Lofthus

发明人： R. Victor Klassen ,  Stephen C. Morgana ,  Robert P. Loce ,  Michael Branciforte ,  Daniel R. Maurer ,  Michael J. Martin ,  Robert M. Lofthus

IPC分类号： H04N1/407 ,  H04N1/60 ,  H04N1/29 ,  B41J2/47

CPC分类号： B41J2/471

摘要： A method for rendering a raster output level determines an image position of a pixel of interest (POI) within an image. An intended raster output level, which corresponds to the POI, is received into a processing device. A final raster input level is determined as a function of the image position and the intended raster output level. The final input level and the image position are transmitted to an output device. An actual raster output level is rendered, via the output device, at a position on an output medium corresponding to the image position. The actual raster output level substantially matches the intended raster output level.

摘要翻译： 用于渲染光栅输出电平的方法确定图像内的感兴趣像素（POI）的图像位置。 对应于POI的预期光栅输出电平被接收到处理设备中。 根据图像位置和预期的光栅输出电平确定最终光栅输入电平。 最终输入电平和图像位置被发送到输出设备。 通过输出设备，在对应于图像位置的输出介质上的位置处渲染实际的光栅输出电平。 实际光栅输出电平基本上与预期的光栅输出电平相匹配。

公开(公告)号：US06834124B1

公开(公告)日：2004-12-21

申请号：US09687111

申请日：2000-10-16

申请人： Ying-wei Lin ,  Robert P. Loce

发明人： Ying-wei Lin ,  Robert P. Loce

IPC分类号： G06K940

CPC分类号： G06T5/001 ,  H04N1/40

摘要： An adaptive image enhancement filter includes a template matching module for comparing an observed pixel pattern comprising a target pixel and one or more neighboring pixels to a set of templates to determine if the observed pixel pattern matches any of the templates. The template matching module generates a match identifier signal indicating which of the templates, if any, the observed pixel pattern is found to match. Based on this match identifier, a signal generation module provides an enhanced output signal for the target pixel. The template matching and/or the signal generation modules can be independently modified to adapt to changing conditions as identified by signals identifying image attributes and marking process attributes.

摘要翻译： 自适应图像增强滤波器包括模板匹配模块，用于将包括目标像素和一个或多个相邻像素的观察像素图案与一组模板进行比较，以确定观察到的像素图案是否匹配任何模板。 模板匹配模块生成匹配标识符信号，指示哪个模板（如果有的话）发现观察到的像素图案匹配。 基于该匹配标识符，信号生成模块为目标像素提供增强的输出信号。 可以独立地修改模板匹配和/或信号生成模块以适应由识别图像属性和标记处理属性的信号所识别的变化的条件。

公开(公告)号：US06816269B1

公开(公告)日：2004-11-09

申请号：US09666706

申请日：2000-09-21

申请人： Robert P. Loce ,  Yeqing Zhang ,  Martin E. Banton ,  Nancy B. Goodman ,  Susan J. Zoltner ,  Steve P. Hoover

发明人： Robert P. Loce ,  Yeqing Zhang ,  Martin E. Banton ,  Nancy B. Goodman ,  Susan J. Zoltner ,  Steve P. Hoover

IPC分类号： G06F1500

CPC分类号： H04N1/047 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/04787 ,  H04N2201/04794

摘要： A registration system for image data in a binary image path includes a registration parameter source, such as a preprogrammed memory or a dynamic device, which provides registration parameters to correct for registration errors from a predetermined reference likely or predicted to occur during image output. A warping processor is in data communication with the registration parameter source which applies a selected registration parameter to an element of the image data resulting in a warped data element, minimizing the effects of the registration error. The system optionally includes an image reducing device which receives groups of high addressable binary image data and converts them to a single pixel. The pixel is then provided to the warping processor. The warping processor applies the selected registration parameter, either static or dynamically selected, from the registration parameter source to the averaged single pixel producing a warped data element. The warped data element is then optionally provided to a tone reproduction curve calibrator which adjusts for darkness errors induced by the warping or displacement of the warped data element. The calibrated pixel is then re-rendered by a processor which processes the calibrated pixel back into a plurality of print-ready data elements. The processor estimates quantization errors induced by the warping of the pixel positioning and disperses that error to following pixels. The print-ready data elements are provided to an image output terminal which produces a physical representation of the original binary image.

公开(公告)号：US06438273B1

公开(公告)日：2002-08-20

申请号：US09221285

申请日：1998-12-23

申请人： Robert P. Loce ,  Jeffrey D. Kingsley

发明人： Robert P. Loce ,  Jeffrey D. Kingsley

IPC分类号： G06K932

CPC分类号： H04N1/40068 ,  G06T5/20 ,  H04N1/40037

摘要： The present invention is a method and apparatus for improving the appearance of electronic images, and more specifically, to the efficient use of template rotation within a template matching process to enhance such images. The invention reduces the number of entries that are stored in a look up table by eliminating identical patterns that differ only by the angle at which they are output. The appropriate templates are then rotated it by the required angle for output subsequent to their retrieval from the lookup table.

摘要翻译： 本发明是一种用于改善电子图像的外观的方法和装置，更具体地，涉及在模板匹配过程中有效利用模板旋转以增强这些图像。 本发明通过消除不同于其输出角度的相同图案来减少存储在查找表中的条目的数量。 然后将合适的模板旋转所需的角度，以便在从查找表检索之后输出。

公开(公告)号：US06363177B1

公开(公告)日：2002-03-26

申请号：US09223325

申请日：1998-12-30

申请人： Robert P. Loce ,  David Glassman ,  Henry P. Jankowski

发明人： Robert P. Loce ,  David Glassman ,  Henry P. Jankowski

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。

公开(公告)号：US06301397B1

公开(公告)日：2001-10-09

申请号：US09223266

申请日：1998-12-30

申请人： Henry P. Jankowski ,  David Glassman ,  Robert P. Loce

发明人： Henry P. Jankowski ,  David Glassman ,  Robert P. Loce

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。