公开(公告)号：US20060077489A1

公开(公告)日：2006-04-13

申请号：US10923116

申请日：2004-08-20

申请人： Yeqing Zhang ,  Robert Loce ,  Beilei Xu

发明人： Yeqing Zhang ,  Robert Loce ,  Beilei Xu

IPC分类号： H04N1/46

CPC分类号： H04N1/603

摘要： Compensation for rendering device non-uniformities is provided for halftoned images. A spatially dependent tone reproduction curve (TRC) provides compensation values. Pixel location information is used to access TRC values. For example, the values are modification values. The modification values are added to the pixel values to generate combined values. Quantization is applied to the combined values to prepare compensated image data for rendering. For example, Rank Ordered Error Diffusion is applied to the combined values. The combined values may include diffused error from previously processed pixels. Gray values may be estimated for the respective pixels. The estimated gray values may be used to access compensation information from a TRC that is both spatially and gray value dependent. Mathematical basis decomposition is used to reduce TRC memory requirements. For example, Discrete Cosine Transformation, Singular Value Decomposition or Principal Component Analysis is used to determine a compact form for the TRC.

公开(公告)号：US20050275855A1

公开(公告)日：2005-12-15

申请号：US10852243

申请日：2004-05-25

申请人： Howard Mizes ,  Beilei Xu ,  Chu-heng Liu ,  Robert Loce ,  Michael Thompson ,  Eric Hamby ,  R. Viturro

发明人： Howard Mizes ,  Beilei Xu ,  Chu-heng Liu ,  Robert Loce ,  Michael Thompson ,  Eric Hamby ,  R. Viturro

IPC分类号： B41J29/46 ,  G01N21/88 ,  G03G21/00 ,  H04N1/00 ,  H04N1/409 ,  H04N1/58

CPC分类号： H04N1/00002 ,  H04N1/00015 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00053 ,  H04N1/00063 ,  H04N1/00068 ,  H04N1/00087

摘要： A method of measuring and controlling high frequency banding, the method includes creating a test pattern, sensing the test pattern with optical sensors, determining a beat frequency based on the sensed test pattern, and determining the frequency, phase and amplitude of high frequency banding based on the beat frequency. An exemplary embodiment of a feedback control method for controlling high frequency banding includes creating a test pattern, sensing the test pattern with optical sensors, measuring high frequency banding and adjusting the imaging parameters based on the measured high frequency banding in order to decrease the extent of high frequency banding. Moreover, an exemplary embodiment of a system for measuring high frequency banding includes an image marking device having a receiving member, optical sensors arranged on the receiving member, and a controller that is functionally coupled to the optical sensors and to the marking device.

摘要翻译： 一种测量和控制高频带的方法，该方法包括创建测试图案，用光学传感器感测测试图案，基于感测到的测试图案确定拍频，以及确定基于高频带的频率，相位和幅度 在拍频上 用于控制高频带的反馈控制方法的示例性实施例包括创建测试图案，用光学传感器感测测试图案，测量高频带并基于所测量的高频带来调整成像参数，以便降低 高频带。 此外，用于测量高频带的系统的示例性实施例包括具有接收构件的图像标记装置，布置在接收构件上的光学传感器以及功能上耦合到光学传感器和标记装置的控制器。

公开(公告)号：US20070140552A1

公开(公告)日：2007-06-21

申请号：US11314670

申请日：2005-12-21

申请人： Zhigang Fan ,  Lalit Mestha ,  Yao Wang ,  Robert Loce ,  Yeqing Zhang

发明人： Zhigang Fan ,  Lalit Mestha ,  Yao Wang ,  Robert Loce ,  Yeqing Zhang

IPC分类号： G06K9/00 ,  H04N1/60

CPC分类号： H04N1/4015

摘要： A method and system for selecting an optimal set of S number of calibration patches for an image producing system. The method of selecting the S number of calibration patches includes acquiring a set of K number of basis eigen vectors and model parameters which represent the image producing system having G number of colors and computing the optimal set of S number of colors selected from the set of G number of colors. Each one of the computed set of S number of colors is used for one of the S number of calibration patches.

摘要翻译： 一种用于为图像产生系统选择S个校准块的最佳集合的方法和系统。 选择S个校准贴片的方法包括获取K个基本特征向量和模型参数的集合，所述基本特征向量和模型参数表示具有G个颜色的图像生成系统，并且计算从该组中选择的S个颜色的最佳集合 G色数。 所计算的S个颜色的组合中的每一个用于S个校准块中的一个。

公开(公告)号：US20070035748A1

公开(公告)日：2007-02-15

申请号：US11199692

申请日：2005-08-09

申请人： Yeqing Zhang ,  Robert Loce ,  Raja Bala

发明人： Yeqing Zhang ,  Robert Loce ,  Raja Bala

IPC分类号： G03F3/08 ,  G06F15/00

CPC分类号： H04N1/6027

摘要： A color transformation method which accounts for colorant interactions includes establishing a plurality of tone reproduction curves (TRCs), for one or more of the color separations forming a digital image. Each TRC accounts for colorant interactions between a primary colorant with which the first color separation is to be rendered and at least one secondary colorant with which at least a second of the plurality of color separations is to be rendered. The TRCs include input values and their corresponding modified input values. In a given TRC, the input values of the second and optionally other color separations are fixed. For a pixel of the digital image having a given input values for the first and second color separation one or more of the TRCs are selected which bound the fixed input value for the second color separation and a modified input value is determined therefrom.

摘要翻译： 考虑着色剂相互作用的颜色变换方法包括为形成数字图像的一个或多个分色建立多个色调再现曲线（TRC）。 每个TRC考虑到将要渲染第一颜色分离的主要着色剂与至少一种次要着色剂之间的着色剂相互作用，至少一个次要着色剂将使多个分色中的至少一个分色进行渲染。 TRC包括输入值及其对应的修改输入值。 在给定的TRC中，第二个和任选的其他分色的输入值是固定的。 对于具有用于第一和第二颜色分离的给定输入值的数字图像的像素，选择一个或多个TRC，其限定用于第二颜色分离的固定输入值，并且从其确定修改的输入值。

公开(公告)号：US20060279749A1

公开(公告)日：2006-12-14

申请号：US11149522

申请日：2005-06-10

申请人： Yeqing Zhang ,  Robert Loce

发明人： Yeqing Zhang ,  Robert Loce

IPC分类号： G06F3/12 ,  G06F15/00

CPC分类号： G06T9/008

摘要： A method for encoding high resolution data to a form having a reduced number of bits can include predefining a plurality of high-output-resolution output patterns, associating respective output-resolution output patterns of the plurality with respective encoded resolution bit patterns, receiving a block of input-resolution input data, determining a respective difference between a pattern of the received block of input data and the respective output-resolution output patterns, selecting a respective output-resolution output pattern associated with a lowest respective difference to be a representative output pattern for the received block of input data and encoding the received block of input-resolution input data as the respective encoded resolution bit pattern associated with the selected respective representative high-output-resolution output pattern. A system includes a library of output patterns in association with encoded resolution bit patterns, a block analyzer, a block selector and an encoder.

公开(公告)号：US20060274337A1

公开(公告)日：2006-12-07

申请号：US11143818

申请日：2005-06-02

申请人： Edul Dalal ,  Wencheng Wu ,  Robert Loce ,  Raja Bala ,  Yeqing Zhang ,  Norman Zeck

发明人： Edul Dalal ,  Wencheng Wu ,  Robert Loce ,  Raja Bala ,  Yeqing Zhang ,  Norman Zeck

IPC分类号： G06F15/00

CPC分类号： H04N1/6038 ,  H04N1/6041

摘要： Spatially dependent colorant interaction effects are identified and isolated from other aspects of spatially dependent colorant appearance nonuniformities. A decorrelating function for compensating for the identified spatially dependent colorant interaction effects is determined. Spatially dependent single colorant compensating functions for compensating for the other aspects of the spatially dependent colorant appearance nonuniformities may also be determined. Image data is processed through the decorrelating function, thereby generating colorant values that are compensated for spatially dependent colorant interaction effects. Optionally, image data is also processed through the spatially dependent single colorant compensating functions, thereby generating colorant values that are compensated for both aspects of colorant appearance nonuniformities. The two kinds of compensating functions may be determined, calibrated and/or stored at different spatial and temporal frequencies or resolutions. One or both of the compensating functions may be employed to maintain consistency across a plurality of rendering devices (e.g., marking engines).

公开(公告)号：US20060152764A1

公开(公告)日：2006-07-13

申请号：US11034057

申请日：2005-01-13

申请人： Robert Loce ,  Beilei Xu ,  Reiner Eschbach ,  David Lieberman

发明人： Robert Loce ,  Beilei Xu ,  Reiner Eschbach ,  David Lieberman

IPC分类号： H04N1/405

CPC分类号： H04N1/407 ,  H04N1/40068 ,  H04N1/4052

摘要： A method of adjusting a TRC of an image is provided. The method involves receiving an image at an input resolution, resampling the image to a processing resolution if the imput resolution and the processing resolution are not same, processing the image using rank-ordered error diffusion, and resampling the processed image to a desired output resolution for the image if the processing resolution and the output resolution are not same.

摘要翻译： 提供了一种调整图像的TRC的方法。 该方法包括以输入分辨率接收图像，如果输入分辨率和处理分辨率不相同，则将图像重新采样到处理分辨率，使用等级错误扩散处理图像，并将处理的图像重新采样到期望的输出分辨率 对于图像，如果处理分辨率和输出分辨率不相同。

公开(公告)号：US20060023258A1

公开(公告)日：2006-02-02

申请号：US10909627

申请日：2004-08-02

申请人： Robert Loce ,  Charles Hains ,  Beilei Xu ,  Connie Purdum ,  Xiaoxue Cheng

发明人： Robert Loce ,  Charles Hains ,  Beilei Xu ,  Connie Purdum ,  Xiaoxue Cheng

IPC分类号： H04N1/405

CPC分类号： H04N1/4058

摘要： A method for minimizing boundary effects when switching between halftone screens on a scanline, includes selecting a first halftone screen having a first fundamental frequency and a first angle for printing pixels of a first type; and selecting a second halftone screen having a second fundamental frequency and a second angle for printing pixels of a second type, wherein the second frequency and second angle are harmonically matched to the first frequency and first angle, wherein at least one pixel of the second type is adjacent to a pixel of the first type. In one embodiment, the first and second frequencies are selected to have a substantially zero frequency beat. In another, the first and second frequencies are selected to have a substantially high frequency beat.

摘要翻译： 一种用于在扫描线上的半色调屏幕之间切换时最小化边界效应的方法，包括选择具有第一基频和第一角度的第一半色调屏幕，用于打印第一类型的像素; 以及选择具有第二基频和第二角度的第二半色调屏幕，用于打印第二类型的像素，其中所述第二频率和第二角度与所述第一频率和第一角度谐波匹配，其中所述第二类型的至少一个像素 与第一类型的像素相邻。 在一个实施例中，第一和第二频率被选择为具有基本为零的频率节拍。 在另一个中，选择第一和第二频率具有基本上高的频率节拍。

公开(公告)号：US20050111694A1

公开(公告)日：2005-05-26

申请号：US10721948

申请日：2003-11-25

申请人： Robert Loce ,  Yeqing Zhang ,  Gaurav Sharma

发明人： Robert Loce ,  Yeqing Zhang ,  Gaurav Sharma

IPC分类号： G06T1/00 ,  H04N1/32 ,  H04N1/387 ,  H04N1/41 ,  H04N1/56 ,  H04N11/04 ,  G06K9/00 ,  G06K7/12 ,  G06K9/36

CPC分类号： H04N1/56 ,  H04N1/32149 ,  H04N1/32309

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. Source image confusion in a rendered composite image is controlled by application of a illuminant-neutral gray component replacement (GCR) technique to the darkness common to the different colorants under the multiple illuminants.

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。 渲染合成图像中的源图像混淆通过将光源 - 中性灰色成分置换（GCR）技术应用于在多种光源下的不同着色剂共同的黑暗来控制。

公开(公告)号：US20070147699A1

公开(公告)日：2007-06-28

申请号：US11317427

申请日：2005-12-23

申请人： Robert Loce ,  Beilei Xu ,  Stuart Schweid ,  Son Nguyen ,  Michael Branciforte

发明人： Robert Loce ,  Beilei Xu ,  Stuart Schweid ,  Son Nguyen ,  Michael Branciforte

IPC分类号： G06K9/40

CPC分类号： G06K9/4609 ,  G06T5/003 ,  G06T5/20 ,  G06T7/13 ,  G06T2207/20164 ,  G06T2207/20192 ,  H04N1/4092

摘要： The teachings provided herein disclose a method for corner sharpening in the display of a bitmapped digital image. The method includes the steps of selecting a target pixel location within the digital image; observing a set of pixels within a pixel observation window superimposed on the digital image relative to the target pixel location; generating edge-state codes for a plurality of pairs of neighboring vectors of pixels within the pixel observation window; generating corner-identification codes from the plurality of edge-state codes using at least one look-up table so as to thereby identify corner pixels; and, assigning a pixel value in an output image plane in a location corresponding to the target pixel in the input image, such that assigned value extends a corner where indicated by a corner identification code, thereby producing a sharpening effect. The method may be used for improving the print quality of line-art corners and other fine details as found in both font and image data.

摘要翻译： 本文提供的教导公开了一种用于在位图数字图像的显示中进行拐角锐化的方法。 该方法包括以下步骤：在数字图像内选择目标像素位置; 观察相对于目标像素位置叠加在数字图像上的像素观察窗内的一组像素; 为所述像素观察窗口内的多个相邻像素向量对生成边缘状态代码; 使用至少一个查找表从所述多个边缘状态代码生成角标识码，从而识别角落像素; 并且在与输入图像中的目标像素相对应的位置的输出图像平面中分配像素值，使得分配值延伸由拐角识别码指示的角部，从而产生锐化效果。 该方法可以用于提高字体和图像数据中发现的线条角落的其他精细细节的打印质量。