公开(公告)号：US20040179090A1

公开(公告)日：2004-09-16

申请号：US10812545

申请日：2004-03-29

Applicant: Xerox Corporation

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

IPC: B41J002/47

CPC classification number: B41J2/471

Abstract: 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.

Abstract translation: 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：US20010038460A1

公开(公告)日：2001-11-08

申请号：US09870304

申请日：2001-05-30

Applicant: Xerox Corporation

Inventor： Robert P. Loce ,  Michael Branciforte ,  Ying-Wei Lin

IPC: B41B001/00

CPC classification number: G06T5/20 ,  H04N1/58

Abstract: A method for processing digital images to be displayed, stored, or printed, to eliminate blooming and other artifacts. The system utilizes morphological processes to isolate and modify image structures susceptible to marking process artifacts and then combines the modified image structures with the input image to produce a printable image that may be rendered on a given printer.

公开(公告)号：US20030090729A1

公开(公告)日：2003-05-15

申请号：US09968651

申请日：2001-10-01

Applicant: XEROX CORPORATION

Inventor： Robert P. Loce ,  Michael Branciforte ,  Beilei Xu

IPC: B41J001/00 ,  H04N001/405 ,  G06K015/00

CPC classification number: H04N1/4052

Abstract: Error is distributed to pixels neighboring a pixel of interest based on a ranking of the neighboring pixels. The ranking is based on pixel values of the neighboring pixels. Optionally a spatial weighting is applied to the pixel values before ranking, to provide a preference for pixels closest to the pixel of interest or to a particular portion of a related halftone screen. Rank order based error diffusion provides compact halftone dots without patterning artifacts. An image processing system operative to perform rank order error diffusion includes a pixel ranker and an error diffuser. In a xerographic environment the image processing system includes a xerographic printer.

Abstract translation: 基于相邻像素的等级，将错误分布到与感兴趣像素相邻的像素。 排名基于相邻像素的像素值。 可选地，在排序之前对像素值应用空间加权，以提供对最靠近感兴趣的像素或相关半色调屏幕的特定部分的像素的偏好。 基于秩次的误差扩散提供了紧凑的半色调点，而没有图案化伪像。 可执行排序误差扩散的图像处理系统包括像素排列器和误差扩散器。 在静电复印环境中，图像处理系统包括静电印刷机。

公开(公告)号：US20020075379A1

公开(公告)日：2002-06-20

申请号：US09738573

申请日：2000-12-15

Applicant: XEROX CORPORATION

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

IPC: B41J002/47

CPC classification number: B41J2/471

Abstract: 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 output level is determined as a function of the image position and the intended raster output level. The final output 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.

Abstract translation: 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。 最终光栅输出电平被确定为图像位置和预期光栅输出电平的函数。 最终输出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。