公开(公告)号：US5553171A

公开(公告)日：1996-09-03

申请号：US507064

申请日：1995-07-26

申请人： Ying-wei Lin ,  Jeng-Nan Shiau

发明人： Ying-wei Lin ,  Jeng-Nan Shiau

IPC分类号： H04N1/387 ,  G06T3/40 ,  G06T5/20 ,  H04N1/40 ,  G06K9/36

CPC分类号： G06T3/4007 ,  H04N1/40068

摘要： A method of arbitrary image resolution conversion takes an original print ready image at a first resolution and orientation and simulates printing of that image by creating a representation of a page at a particular resolution and orientation using a suitable spot model for the reconstruction function. The image is then filtered with a low pass filter and sampled with an aperture that corresponds to the desired output. The image data, which may be definable at several bits per pixel, is then made print-ready by reducing the number of bits defining each pixel to a valid output state. The reduction step is accomplished through error diffusion methods that maintain the local area gray density level. The filtering step reduces moire in the converted image.

摘要翻译： 任意图像分辨率转换的方法以第一分辨率和方向获取原始打印准备好的图像，并且通过使用用于重建功能的合适的斑点模型以特定分辨率和取向创建页面的表示来模拟该图像的打印。 然后用低通滤波器过滤图像，并用对应于期望输出的孔进行采样。 然后，可以通过将每个像素的几个比特定义的图像数据通过将定义每个像素的比特数减少到有效输出状态来进行打印准备。 还原步骤通过维持局部区域灰度密度水平的误差扩散方法来实现。 过滤步骤减少转换图像中的莫尔条纹。

公开(公告)号：US07753466B2

公开(公告)日：2010-07-13

申请号：US11614396

申请日：2006-12-21

申请人： Jeng-Nan Shiau

发明人： Jeng-Nan Shiau

IPC分类号： B41J29/38

CPC分类号： B41J29/393

摘要： 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.

摘要翻译： 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：US07545540B2

公开(公告)日：2009-06-09

申请号：US11155982

申请日：2005-06-17

申请人： Jeng-nan Shiau

发明人： Jeng-nan Shiau

IPC分类号： H04N1/40 ,  H04N1/46 ,  H04N1/60

CPC分类号： H04N1/38 ,  G06K9/38 ,  G06K2209/01 ,  H04N1/56

摘要： A system and method remove at least one color from a color image in a chrominance-luminance color space. The processing method includes generating screen values for machine independent color space image pixels, comparing the screen values for the pixels with pixel values for one component of the machine independent color space, and generating a dropout pixel for each pixel having a screen value that is less than the pixel value for the one component of the machine independent color space. The screen value for a pixel may be compared to the pixel value for the luminance component to determine whether to generate a dropout pixel or not.

摘要翻译： 系统和方法从色度 - 亮度色彩空间中的彩色图像中移除至少一种颜色。 处理方法包括生成机器独立色彩空间图像像素的屏幕值，将像素的屏幕值与机器独立颜色空间的一个分量的像素值进行比较，并且生成具有较小屏幕值的每个像素的压差像素 比机器独立颜色空间的一个组件的像素值。 可以将像素的屏幕值与亮度分量的像素值进行比较，以确定是否生成丢失像素。

公开(公告)号：US20080150974A1

公开(公告)日：2008-06-26

申请号：US11614396

申请日：2006-12-21

申请人： JENG-NAN SHIAU

发明人： JENG-NAN SHIAU

IPC分类号： B41J29/38

CPC分类号： B41J29/393

摘要： 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.

摘要翻译： 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：US06631215B1

公开(公告)日：2003-10-07

申请号：US09448009

申请日：1999-11-23

申请人： Jeng-nan Shiau ,  Raymond J. Clark ,  Stuart A. Schweid ,  Terri A. Clingerman

发明人： Jeng-nan Shiau ,  Raymond J. Clark ,  Stuart A. Schweid ,  Terri A. Clingerman

IPC分类号： G06K940

CPC分类号： G06T5/20

摘要： A method and apparatus are provided for determining a weighted average measured reflectance parameter Rm for pixels in an image for use in integrated cavity effect correction of the image. For each pixel of interest Pi,j in the image, an approximate spatial dependent average Ai,j, Bi,j of video values in a region of W pixels by H scan lines surrounding the pixel of interest Pi,j is computed by convolving video values Vi,j of the image in the region with a uniform filter. For each pixel of interest Pi,j a result of the convolving step is used as the reflectance parameter Rm. The apparatus includes a video buffer for storing the pixels of the original scanned image, and first and second stage average buffers for storing the computed approximate spatial dependent averages Ai,j, Bi,j. First and second stage processing circuits respectively generate the first and second stage average values Ai,j, Bi,j by convolving the video values of the image in a preselected region with a uniform filter.

摘要翻译： 提供一种方法和装置，用于确定用于图像的集成腔效应校正的图像中的像素的加权平均测量反射率参数Rm。 对于图像中的每个感兴趣像素P i，j，通过卷积视频来计算在围绕像素p，j的W像素的H像素的区域中的视频值的近似空间依赖平均值Ai，j，Bi，j 在具有均匀滤波器的区域中的图像的值Vi，j。 对于感兴趣的每个像素Pi，j，使用卷积步骤的结果作为反射参数Rm。 该装置包括用于存储原始扫描图像的像素的视频缓冲器，以及用于存储所计算的近似空间相关平均值Ai，j，Bi，j的第一和第二平均缓冲器。 第一和第二级处理电路通过使用均匀的滤波器卷积预选区域中的图像的视频值，分别产生第一和第二平均值Ai，j，Bi，j。

公开(公告)号：US06240205B1

公开(公告)日：2001-05-29

申请号：US09099419

申请日：1998-06-18

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

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

IPC分类号： G06K934

CPC分类号： G06K9/00456

摘要： 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.

摘要翻译： 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

申请人： Jeng-Nan Shiau

发明人： Jeng-Nan Shiau

IPC分类号： G06K934

CPC分类号： H04N1/40062 ,  G06T7/44 ,  G06T2207/10008

摘要： 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

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

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

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

CPC分类号： G06K9/00456

摘要： 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.

摘要翻译： 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

申请人： Jeng-Nan Shiau ,  Francis K. Tse

发明人： Jeng-Nan Shiau ,  Francis K. Tse

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

CPC分类号： H04N1/4052

摘要： 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.

摘要翻译： 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。

公开(公告)号：US5642202A

公开(公告)日：1997-06-24

申请号：US347756

申请日：1994-12-01

申请人： Leon C. Williams ,  Jeng-nan Shiau

发明人： Leon C. Williams ,  Jeng-nan Shiau

IPC分类号： H04N1/00 ,  G09G5/00 ,  H04N1/047 ,  H04N1/407 ,  H04N1/401

CPC分类号： H04N1/047 ,  H04N1/4076 ,  H04N2201/04729 ,  H04N2201/04789

摘要： A system and method for calibrating a printing system includes a printer and a master test image document printed by the printer. The master test image has three locator symbols and a plurality of test objects, each symbol having a distinct apex. The apexes are non-colinear. A memory prestores image data corresponding to the test objects printed on the master test image document and positional data corresponding to a desired coordinate value for each non-colinear apex. The system also includes a scanner for scanning the master test image document and detects the locator symbols printed on master test image document to generate transition data therefrom. The calibration process determines a coordinate value for each non-colinear apex based on the transition data and generates a transformation matrix based on a difference between the determined coordinate value for each non-colinear apex and the desired coordinate value for each non-colinear apex. A compensation process retrieves prestored image data corresponding to the scanned image data based on the transformation matrix. The calibration process then compares scanned image data with the retrieved prestored image data to generate compensation values based on a difference between the scanned image data and the prestored image data.

摘要翻译： 用于校准打印系统的系统和方法包括由打印机打印的打印机和主测试图像文档。 主测试图像具有三个定位符符号和多个测试对象，每个符号具有不同的顶点。 顶点是非共线的。 存储器预先存储对应于打印在主测试图像文档上的测试对象的图像数据和对应于每个非共线顶点的期望坐标值的位置数据。 该系统还包括用于扫描主测试图像文档并检测打印在主测试图像文档上的定位符号以从其生成转换数据的扫描仪。 校准过程基于转移数据确定每个非共线顶点的坐标值，并且基于每个非共线顶点的确定坐标值与每个非共线顶点的期望坐标值之间的差产生变换矩阵。 补偿过程基于变换矩阵来检索对应于扫描图像数据的预存储图像数据。 然后，校准过程将扫描图像数据与检索到的预存图像数据进行比较，以基于扫描图像数据和预存图像数据之间的差异生成补偿值。