公开(公告)号：US20060269132A1

公开(公告)日：2006-11-30

申请号：US11139546

申请日：2005-05-31

Applicant: David Metcalfe ,  Stuart Schweid ,  Jeng-Nan Shiau

Inventor： David Metcalfe ,  Stuart Schweid ,  Jeng-Nan Shiau

IPC: G06K9/34 ,  G06K9/00

CPC classification number: G06K9/34 ,  H04N1/40062

Abstract: Methods and apparatus for segmenting image data into one or more windows may collect statistics on white regions, otherwise called enclosed white windows. Such enclosed white windows may be merged with one of a surrounding nonwhite window and a background based upon the enclosed white window's size, edge characteristics, cumulative statistics and/or at least one control parameter. Such merging may be accomplished at a time subsequent to enclosing the white region or dynamically while the window is being assembled scanline-by-scanline.

Abstract translation: 将图像数据分割成一个或多个窗口的方法和装置可以收集关于白色区域的统计数据，也称为封闭的白色窗口。 基于所包围的白色窗口的尺寸，边缘特性，累积统计量和/或至少一个控制参数，这样的封闭的白色窗口可以与周围的非白色窗口和背景之一合并。 这样的合并可以在包围白色区域之后的时间完成，或者在窗口正在被扫描线扫描线时动态地完成。

公开(公告)号：US5933539A

公开(公告)日：1999-08-03

申请号：US655596

申请日：1996-05-30

Applicant: David J. Metcalfe ,  Jeng-Nan Shiau

Inventor： David J. Metcalfe ,  Jeng-Nan Shiau

IPC: B41J2/52 ,  G06T5/00 ,  H04N1/405 ,  G06K9/40 ,  H04N1/40

CPC classification number: H04N1/4053

Abstract: A printing system for rendering marks on a recording medium receives a multi-level grey scale pixel value representing a pixel having a first resolution. A screening circuit generates a screened multi-level grey scale pixel value equal to (G.sub.L -V.sub.i)+(S.sub.i -Th)*Dmp.sub.Vi *Mod.sub.Eff wherein G.sub.L is the maximum grey level value of the pixel, V.sub.i is equal to the multi-level grey scale pixel value of the first resolution, S.sub.i is equal to a screen value corresponding to a position of the pixel, Th is the threshold value, Dmp.sub.Vi is a video dependent dampening factor, and Mod.sub.Eff is a modulation multiplication factor. An interpolator converts the screened multi-level grey scale pixel value to a second resolution, the second resolution being higher than the first resolution, and a binarization circuit binarizes the converted multi-level grey scale pixel value so as to output a binary signal and an error value, the error value having a resolution equal to the first resolution. The error value is diffused to multi-level grey scale pixel values corresponding to pixels adjacent to the pixel having the first resolution, and the binary signal is converted into a mark on the recording medium.

Abstract translation: 用于在记录介质上渲染标记的打印系统接收表示具有第一分辨率的像素的多级灰度像素值。 筛选电路产生等于（GL-Vi）+（Si-Th）* DmpVi * ModEff的筛选的多级灰度像素值，其中GL是像素的最大灰度级值，Vi等于多级 第一分辨率的灰阶像素值，Si等于对应于像素位置的屏幕值，Th是阈值，DmpVi是视频相关的衰减因子，ModEff是调制倍增因子。 内插器将所筛选的多级灰阶像素值转换为第二分辨率，第二分辨率高于第一分辨率，二值化电路对转换后的多级灰阶像素值进行二值化处理，以输出二进制信号和 误差值，误差值具有等于第一分辨率的分辨率。 误差值扩散到与具有第一分辨率的像素相邻的像素对应的多级灰度像素值，并且二进制信号被转换成记录介质上的标记。

公开(公告)号：US5696601A

公开(公告)日：1997-12-09

申请号：US285265

申请日：1994-08-03

Applicant: David J. Metcalfe ,  Jeng-Nan Shiau ,  Leon C. Williams

Inventor： David J. Metcalfe ,  Jeng-Nan Shiau ,  Leon C. Williams

IPC: H04N1/403 ,  H04N1/405 ,  H04N1/40

CPC classification number: H04N1/4052

Abstract: A method and system implements a redistributive characteristic into an error diffusion process. A grey level value representing a pixel is received. A threshold circuit thresholds the received grey level value and generates an error value as a result of the threshold. A portion of the error value is diffused to adjacent pixels on a next scanline. All the error for a single pixel on the next scanline is accumulated. Since this accumulated error has a greater number of bits than can be stored in a buffer, a portion of the accumulated error is truncated and redistributed to a down stream pixel for inclusion in the downstream pixel's error accumulation process. The grey level value has a first resolution which corresponds to an original input resolution. In a high addressabilty environment, the received grey level value is interpolated to subpixel grey level values before thresholding.

Abstract translation: 一种方法和系统在误差扩散过程中实现再分配特性。 接收表示像素的灰度值。 阈值电路对接收的灰度级值进行阈值，并作为阈值的结果生成错误值。 错误值的一部分扩散到下一个扫描线上的相邻像素。 累积下一个扫描线上单个像素的所有错误。 由于该累加误差具有比可以存储在缓冲器中更多的位数，所以累积误差的一部分被截断并重新分配给下行像素以包括在下游像素的误差累加处理中。 灰度值具有对应于原始输入分辨率的第一分辨率。 在高可寻址环境中，接收到的灰度值被内插到阈值处理之前的子像素灰度值。

公开(公告)号：US5293430A

公开(公告)日：1994-03-08

申请号：US4479

申请日：1993-01-12

Applicant: Jeng-Nan Shiau ,  Barbara L. Farrell

Inventor： Jeng-Nan Shiau ,  Barbara L. Farrell

IPC: G06T5/00 ,  H04N1/40 ,  G06K9/36

CPC classification number: H04N1/40062

Abstract: Method and apparatus for processing image pixels to determine the presence of high frequency halftone images. Prior to auto correlation, each pixel in the image is examined to determine whether it is a local area maximum or minimum. A binary image function composed of the image local area maximum or minimums is made available for auto correlation. The presence of peaks at shifts indicative of predetermined halftone image frequencies is detected, and an output signal indicative of the presence or absence of peaks at the predetermined halftone image frequencies is provided. The arrangement is combined with a run length encoder to reduce false microdetection results.

Abstract translation: 用于处理图像像素以确定高频半色调图像的存在的方法和装置。 在自动相关之前，检查图像中的每个像素以确定它是局部区域的最大值还是最小值。 由图像局部最大或最小值组成的二进制图像功能可用于自动相关。 检测出表示预定半色调图像频率的偏移处的峰值的存在，并且提供指示在预定半色调图像频率处是否存在峰值的输出信号。 该装置与游程长度编码器相结合，以减少误检结果。

公开(公告)号：US5196942A

公开(公告)日：1993-03-23

申请号：US583337

申请日：1990-09-17

Applicant: Jeng-Nan Shiau

Inventor： Jeng-Nan Shiau

IPC: H04N1/40 ,  H04N1/405

CPC classification number: H04N1/40087 ,  H04N1/4055

Abstract: A method of reproducing gray levels on a device capable of displaying a limited number of gray levels. A system is disclosed for partitioning an image composed of pixels into halftone cells, each having multiple pixels. Each input pixel value within a halftone cell is translated into an output pixel value in accordance with a set of threshold arrays.

Abstract translation: 在能够显示有限数量的灰度级的装置上再现灰度级的方法。 公开了一种用于将由像素构成的图像分割成具有多个像素的半色调单元的系统。 根据一组阈值阵列将半色调单元内的每个输入像素值转换为输出像素值。

公开(公告)号：US07753466B2

公开(公告)日：2010-07-13

申请号：US11614396

申请日：2006-12-21

Applicant: Jeng-Nan Shiau

Inventor： Jeng-Nan Shiau

IPC: B41J29/38

CPC classification number: B41J29/393

Abstract: A device (200) for manufacturing a color printing includes a printhead (10), a device (300) for additional printing of the color printing, and a printhead motion and jetting control (100). The device (300) also provided herein includes a printhead identification unit (80) and the host processor (90). The printhead identification unit is configured for identifying type of the N jets, calculating the numbers of the defective jets, and then outputting measurement information of the N jets and the defective jets. The host processor is configured for receiving the measurement information from the printhead identification unit and outputting movement instructions of the printhead with a starting position of the printhead in the first printing process.

Abstract translation: 用于制造彩色打印的装置（200）包括打印头（10），用于附加打印彩色打印的装置（300）以及打印头运动和喷射控制（100）。 本文还提供的设备（300）包括打印头识别单元（80）和主机处理器（90）。 打印头识别单元被配置用于识别N射流的类型，计算有缺陷的射流的数量，然后输出N射流和有缺陷喷射的测量信息。 主处理器被配置为从打印头识别单元接收测量信息，并且在第一打印处理中输出具有打印头的起始位置的打印头的移动指令。

公开(公告)号：US06240205B1

公开(公告)日：2001-05-29

申请号：US09099419

申请日：1998-06-18

Applicant: Zhigang Fan ,  Kathy Ryall ,  Jeng-Nan Shiau ,  Shriram Revankar

Inventor： Zhigang Fan ,  Kathy Ryall ,  Jeng-Nan Shiau ,  Shriram Revankar

IPC: G06K934

CPC classification number: G06K9/00456

Abstract: A method and apparatus for segmenting image data into windows and for classifying the windows as typical image types includes making two passes through the image data. The method includes a step of making a first pass through the image data to identify windows and to record the beginning points and image types of each of the windows, and a step of making a second pass through the image data to label each of the pixels as a particular image type. The invention also includes a macro-detection method and apparatus for separating a scanline of image data into edges and image runs and for classifying each of the edges and image runs as standard image types. In the macro-detection method, image runs and edges are classified based on micro-detection results and based on image types of adjacent image runs.

Abstract translation: 用于将图像数据分割成窗口并将窗口分类为典型图像类型的方法和装置包括进行图像数据的两次通过。 该方法包括首先通过图像数据以识别窗口并记录每个窗口的开始点和图像类型的步骤，以及进行第二次通过图像数据以标记每个像素的步骤的步骤 作为特定图像类型。 本发明还包括用于将图像数据的扫描线分离成边缘和图像运行并将每个边缘和图像运行分类为标准图像类型的宏观检测方法和装置。 在宏观检测方法中，图像运行和边缘根据微观检测结果和基于相邻图像运行的图像类型进行分类。

公开(公告)号：US06185328B2

公开(公告)日：2001-02-06

申请号：US09010372

申请日：1998-01-21

Applicant: Jeng-Nan Shiau

Inventor： Jeng-Nan Shiau

IPC: G06K934

CPC classification number: H04N1/40062 ,  G06T7/44 ,  G06T2207/10008

Abstract: A system and method classify a pixel of image data as one of a plurality of image types. A first image characteristic value for the pixel, a second image characteristic value for the pixel, a third image characteristic value for the pixel, and a fourth image characteristic for the pixel is determined. Some of these determinations may be resolution dependent. The values from these determination are utilized in assigning an image type classification to the pixel. Moreover, if at least one of the image characteristic values is greater than a predetermined threshold value the pixel is classified as a halftone peak value. The system includes a plurality of microclassifiers for determining a distinct image characteristic value of the pixel; a plurality of macroreduction circuits connected to the plurality of microclassifiers for performing further higher level operations upon the distinct image characteristic values of the pixel to produce reduced values; and a classification circuit to classify the pixel as an image type based on the reduced values from the macroreduction circuits. The system also includes a circuit to detect flat peaks without detecting multiple peaks and a rectangular blur filtering system.

公开(公告)号：US5850474A

公开(公告)日：1998-12-15

申请号：US686803

申请日：1996-07-26

Applicant: Zhigang Fan ,  Kathy Ryall ,  Jeng-Nan Shiau ,  Shriram Revankar

Inventor： Zhigang Fan ,  Kathy Ryall ,  Jeng-Nan Shiau ,  Shriram Revankar

IPC: G06T7/60 ,  G06K9/20 ,  G06K9/34 ,  G06K9/62

CPC classification number: G06K9/00456

Abstract: A method and apparatus for segmenting image data into windows and for classifying the windows as typical image types includes making two passes through the image data. The method includes a step of making a first pass through the image data to identify windows and to record the beginning points and image types of each of the windows, and a step of making a second pass through the image data to label each of the pixels as a particular image type. The invention also includes a macro-detection method and apparatus for separating a scanline of image data into edges and image runs and for classifying each of the edges and image runs as standard image types. In the macro-detection method, image runs and edges are classified based on micro-detection results and based on image types of adjacent image runs.

Abstract translation: 用于将图像数据分割成窗口并将窗口分类为典型图像类型的方法和装置包括进行图像数据的两次通过。 该方法包括首先通过图像数据以识别窗口并记录每个窗口的开始点和图像类型的步骤，以及进行第二次通过图像数据以标记每个像素的步骤的步骤 作为特定图像类型。 本发明还包括用于将图像数据的扫描线分离成边缘和图像运行并将每个边缘和图像运行分类为标准图像类型的宏观检测方法和装置。 在宏观检测方法中，图像运行和边缘根据微观检测结果和基于相邻图像运行的图像类型进行分类。

公开(公告)号：US5710836A

公开(公告)日：1998-01-20

申请号：US347754

申请日：1994-12-01

Applicant: Jeng-Nan Shiau ,  Francis K. Tse

Inventor： Jeng-Nan Shiau ,  Francis K. Tse

IPC: B41J2/52 ,  H04N1/405 ,  G06T5/00

CPC classification number: H04N1/4052

Abstract: An error diffusion process adds an error value to an input grey image value to produce a modified input grey image value before comparing the modified input grey image value with a predetermined threshold value. A rendering value and error is generated based on the comparison. An error equal to the modified input grey value is generated when the modified input grey value is less than the predetermined threshold value, and an error equal to the modified input grey value minus an effective spot area value is generated when the modified input grey value is equal to or greater than the predetermined threshold value. The effective spot area value is retrieved from a look-up table having a plurality of effective spot area values based on the input grey image value. The effective spot area values is created from a process of scanning a set of grey test patches corresponding to a set of known grey input values and generating image data therefrom, printing a set of grey patches based on the generated image data, measuring a reflectance of each grey test patch to generate a plurality of output grey values, one output grey value for each test patch and corresponding known grey input value, generating a tonal reproduction curve from the set of known grey input values and corresponding output grey values, calculating a plurality of effective spot area values, each effective spot area value being a result of dividing one output grey value by the corresponding known grey input value, and storing the plurality of effective spot area values as a function of the output grey value. The generated error is fractionalized and diffused to neighboring pixels.

Abstract translation: 在将修改的输入灰度图像值与预定阈值进行比较之前，误差扩散处理将误差值与输入灰度图像值相加以产生经修改的输入灰度图像值。 基于比较生成渲染值和错误。 当修改的输入灰度值小于预定阈值时，产生与修改的输入灰度值相等的误差，并且当修改的输入灰度值为 等于或大于预定阈值。 基于输入的灰度图像值，从具有多个有效光斑面积值的查找表中检索有效光斑面积值。 从对与一组已知灰色输入值相对应的一组灰色测试片进行扫描和从其生成图像数据的过程创建有效斑点值，基于所生成的图像数据打印一组灰色片，测量反射率 每个灰色测试贴片以产生多个输出灰度值，每个测试贴片的一个输出灰度值和相应的已知灰色输入值，从已知灰色输入值集合和对应的输出灰度值产生色调再现曲线，计算多个 每个有效斑点面积值是将一个输出灰度值除以相应的已知灰色输入值的结果，并且存储多个有效光斑面积值作为输出灰度值的函数。 所产生的误差被分数化并扩散到相邻像素。