公开(公告)号：US06301393B1

公开(公告)日：2001-10-09

申请号：US09489367

申请日：2000-01-21

Applicant: Kevin E. Spaulding ,  Rajan L. Joshi ,  Geoffrey J. Woolfe

Inventor： Kevin E. Spaulding ,  Rajan L. Joshi ,  Geoffrey J. Woolfe

IPC: H04N164

CPC classification number: G06T11/001

Abstract: A method for representing a digital image having color values with an extended color gamut in a storage color space having a limited color gamut comprising the steps of: adjusting the color values of the extended color gamut digital image to fit within the limited color gamut to form a limited color gamut digital image; representing the limited color gamut digital image in the storage color space; determining a clipped limited color gamut digital image in which highly quantized regions in the limited color gamut digital image have been clipped; determining a residual image representing a difference between the extended color gamut digital image and the clipped limited color gamut digital image; and associating the residual image with the limited color gamut digital image in the storage color space such that the associated residual image and the limited color gamut digital image in the storage color space are adapted to be used to form a reconstructed extended color gamut digital image.

Abstract translation: 一种用于在具有有限色域的存储颜色空间中表示具有扩展色域的具有颜色值的数字图像的方法，包括以下步骤：调整扩展色域数字图像的颜色值以适应有限色域以形成 有限的色域数字图像; 表示存储颜色空间中的有限色域数字图像; 确定已限制的色域数字图像中的高度量化区域已经被限幅的限幅色域数字图像; 确定表示扩展色域数字图像与限幅色域数字图像之间的差的残差图像; 以及将所述残留图像与所述存储颜色空间中的所述有限色域数字图像相关联，使得所述相关联的残留图像和所述存储颜色空间中的所述有限色域数字图像适于用于形成重构的扩展色域数字图像。

公开(公告)号：US06243133B1

公开(公告)日：2001-06-05

申请号：US08813257

申请日：1997-03-07

Applicant: Kevin E. Spaulding ,  Edward B. Gindele ,  James R. Niederbaumer

Inventor： Kevin E. Spaulding ,  Edward B. Gindele ,  James R. Niederbaumer

IPC: H04N973

CPC classification number: H04N9/735 ,  H04N1/6052 ,  H04N1/6077

Abstract: A scene balance correction method for a digital imaging device, including the steps of determining a low-resolution image from an input image in an input color space; applying a color transformation to convert the low-resolution image to a standard color space to form a standard color space low-resolution image; analyzing the standard color space low-resolution image to determine a set of standard color space scene balance correction factors; determining a set of corresponding input color space scene balance correction factors from the standard color space scene balance correction factors using the color transformation; and applying the corresponding input color space scene balance correction factors to the input image to form a corrected input image.

Abstract translation: 一种用于数字成像装置的场景平衡校正方法，包括以下步骤：从输入颜色空间中的输入图像确定低分辨率图像; 应用颜色变换将低分辨率图像转换成标准色彩空间以形成标准色彩空间低分辨率图像; 分析标准色彩空间低分辨率图像，确定一套标准色彩空间场景平衡校正因子; 使用颜色变换从标准色彩空间场景平衡校正因子确定一组相应的输入颜色空间场景平衡校正因子; 以及将相应的输入颜色空间场景平衡校正因子应用于输入图像以形成校正的输入图像。

公开(公告)号：US5975671A

公开(公告)日：1999-11-02

申请号：US657723

申请日：1996-05-30

Applicant: Kevin E. Spaulding ,  Douglas W. Couwenhoven ,  Rodney L. Miller

Inventor： Kevin E. Spaulding ,  Douglas W. Couwenhoven ,  Rodney L. Miller

IPC: H04N1/409 ,  H04N1/52 ,  B41J2/205

CPC classification number: H04N1/409 ,  H04N1/52

Abstract: A method for processing a digitized continuous tone image so that such processed image is adapted to be applied to an image rendering device which prints dots from a set of two or more possible dot-areas and from a set of colorants having different colorant concentrations is disclosed. The method includes selecting a set of N dot-area and colorant concentration combinations, each of said combinations producing a different integrated optical density value and multilevel halftone processing the digitized continuous tone image to produce an output image having a set of output levels wherein one member of the set of N dot-area and colorant concentration combinations is associated with each of the possible output levels.

Abstract translation: 一种用于处理数字化连续色调图像的方法，使得这种处理后的图像适于应用于从一组两个或更多个可能的点区域和从具有不同着色剂浓度的一组着色剂中打印点的图像渲染装置 。 该方法包括选择一组N个点区域和着色剂浓度组合，每个所述组合产生不同的积分光密度值，并且多级半色调处理数字化连续色调图像以产生具有一组输出电平的输出图像，其中一个成员 的N个点区域和着色剂浓度组合的组合与每个可能的输出水平相关联。

公开(公告)号：US5956469A

公开(公告)日：1999-09-21

申请号：US896713

申请日：1997-07-18

Applicant: Hsue-Yang Liu ,  Kevin E. Spaulding ,  Keith A. Hadley ,  Jeffrey R. Szczepanski

Inventor： Hsue-Yang Liu ,  Kevin E. Spaulding ,  Keith A. Hadley ,  Jeffrey R. Szczepanski

IPC: H04N1/60 ,  H04N1/40

CPC classification number: H04N1/6033

Abstract: A method and apparatus are disclosed for calibrating a digital printer to provide a substantially aim printer response. A test target is processed through a set of potential calibration functions to form a set of processed test targets and the set of processed test targets is printed using the digital printer. Thereafter, the set of printed test targets is measured to determine the printer response. An error criterion is determined for each measured test target by comparing the measured printer response for each of the set of potential calibration functions to the aim printer response. The calibration function which has the smallest value of the error criterion is then selected.

Abstract translation: 公开了一种用于校准数字打印机以提供基本上瞄准打印机响应的方法和装置。 通过一组潜在的校准功能处理测试目标，以形成一组经过处理的测试目标，并使用数字打印机打印一组已处理的测试目标。 此后，测量一组打印的测试目标以确定打印机响应。 通过将每组潜在校准功能的测量打印机响应与目标打印机响应进行比较，确定每个测试目标的误差标准。 然后选择具有最小误差准则值的校准函数。

公开(公告)号：US5903681A

公开(公告)日：1999-05-11

申请号：US685740

申请日：1996-07-24

Applicant: Christopher Rueby ,  Kevin E. Spaulding

Inventor： Christopher Rueby ,  Kevin E. Spaulding

IPC: G06T5/20 ,  G06K9/40

CPC classification number: G06T5/20

Abstract: An arrangment is disclosed for reducing edge artifacts produced when printing a digital image on a digital printer, which printer is capable of producing multiple output levels, said digital image being represented as a rectangular array of pixels. In this arrangement, the following steps are accomplished by: computing difference signals between a center pixel value and pixel values of a set of one or more neighboring pixels; determining a pixel correction value responsive to the computed difference signals; and computing a new center pixel value by modifying the center pixel value using the pixel correction value.

Abstract translation: 公开了一种用于减少在数字打印机上打印数字图像时产生的边缘伪像的布置，该打印机能够产生多个输出电平，所述数字图像被表示为矩形像素阵列。 在这种布置中，通过以下步骤来实现以下步骤：计算中心像素值与一组或多个相邻像素的像素值之间的差分信号; 响应于所计算的差信号确定像素校正值; 以及通过使用像素校正值修改中心像素值来计算新的中心像素值。

公开(公告)号：US5581371A

公开(公告)日：1996-12-03

申请号：US399678

申请日：1995-03-07

Applicant: Kevin E. Spaulding ,  Douglas W. Couwenhoven

Inventor： Kevin E. Spaulding ,  Douglas W. Couwenhoven

IPC: H04N1/405

CPC classification number: H04N1/4053

Abstract: An improved error diffusion method for producing an output image from an input image having a set of digitized continuous-tone pixels is disclosed. The method includes computing a visually perceived input value for a digitized continuous-tone input pixel and computing a visually perceived output value for each of the possible output levels. The method further includes selecting the output level in response to the visually perceived input values and the visually perceived output value for each of the possible output levels according to an error criterion; determining an error signal between the visually perceived input value and the visually perceived output value for the selected output level; and weighting the error signal and adjusting the computed visually perceived input values for nearby pixels which have not been processed.

Abstract translation: 公开了一种用于从具有一组数字化连续色调像素的输入图像产生输出图像的改进的误差扩散方法。 该方法包括计算用于数字化连续色调输入像素的视觉感知输入值，并计算每个可能输出电平的视觉感知输出值。 该方法还包括响应于视觉感知的输入值和根据错误标准的每个可能输出电平的视觉感知输出值来选择输出电平; 确定视觉感知的输入值与所选输出电平的视觉感知输出值之间的误差信号; 并对误差信号进行加权并调整对于尚未处理的附近像素的计算出的视觉感知输入值。

公开(公告)号：US5377041A

公开(公告)日：1994-12-27

申请号：US143674

申请日：1993-10-27

Applicant: Kevin E. Spaulding ,  Kevin C. Scott

Inventor： Kevin E. Spaulding ,  Kevin C. Scott

IPC: G06T1/00 ,  G06T5/00 ,  H04N1/46 ,  H04N1/60 ,  H04N1/64

CPC classification number: H04N1/648 ,  H04N1/6019

Abstract: This invention minimizes the visibility of quantization artifacts associated with multi-dimensional color-calibration look-up tables of a limited size. Such artifacts occur when it is not practical to use interpolation methods to approximate color values which are intermediate to the color values stored in the look-up table. In such cases the input color signals are simply quantized for the purpose of addressing the look-up table. This invention works by applying local mean preserving spatial modulation to the input color image values prior to the quantization step. As with multi-level halftoning techniques, the result is that the appearance of intermediate color values is created because the observer will spatially average the output color values.

Abstract translation: 本发明使与有限尺寸的多维颜色校准查找表相关联的量化伪像的可见性最小化。 当使用插值方法来近似在存储在查找表中的颜色值的中间的颜色值是不实际的时候，会发生这种伪像。 在这种情况下，为了寻址查找表的目的，输入颜色信号被简单量化。 本发明通过在量化步骤之前对输入的彩色图像值应用局部平均维持空间调制来工作。 与多级半色调技术一样，结果是创建中间色彩值的外观，因为观察者将在空间上平均输出颜色值。

公开(公告)号：US5150428A

公开(公告)日：1992-09-22

申请号：US677933

申请日：1991-04-01

Applicant: Anthony J. Leone ,  Kevin E. Spaulding

Inventor： Anthony J. Leone ,  Kevin E. Spaulding

IPC: H04N1/405

CPC classification number: H04N1/4055

Abstract: In the present invention each input pixel value is compared against a randomly selected threshold value to provide an output pixel having a value indicative of which of the values is greater. The threshold value is selected from one of a plurality of threshold matrices, each having a predetermined number of threshold values that are arranged in a pattern with the values for a base matrix being increased by an increment for each succeeding one of the plurality of threshold matrices. The selection of the one threshold matrix is made by means of a pseudo-random number generator.

Abstract translation: 在本发明中，将每个输入像素值与随机选择的阈值进行比较，以提供具有指示哪个值更大的值的输出像素。 阈值从多个阈值矩阵中的一个中选择，每个阈值矩阵具有预定数量的阈值，其以图形排列，其中基本矩阵的值增加了多个阈值矩阵中的每个后续的一个阈值的增量 。 通过伪随机数发生器来进行一个阈值矩阵的选择。

公开(公告)号：US08272710B2

公开(公告)日：2012-09-25

申请号：US12174061

申请日：2008-07-16

Applicant: Kevin E. Spaulding ,  Douglas W. Couwenhoven ,  Richard C. Reem ,  Christopher Rueby

Inventor： Kevin E. Spaulding ,  Douglas W. Couwenhoven ,  Richard C. Reem ,  Christopher Rueby

IPC: B41J2/205

CPC classification number: B41J19/142 ,  G06K15/107

Abstract: A method for reducing banding artifacts for bi-directional multi-pass printing on an inkjet printer utilizing a printhead with a plurality of ink nozzles includes defining different print masks to be used for leftward and rightward printing passes such that both the order of ink laydown and the timing between ink laydown on different passes are each substantially constant for a given horizontal position within the image, independent of the vertical position within the image; and printing an input image on the inkjet printer with the defined print masks using a bi-directional multi-pass print mode.

Abstract translation: 一种利用具有多个墨水喷嘴的打印头在喷墨打印机上减少用于双向多次打印的条纹伪影的方法包括限定用于向左和向右打印通过的不同打印掩模，使得墨水沉积和 与图像内的垂直位置无关，图像中给定水平位置的不同通道之间的墨水沉积之间的时间大致恒定; 以及使用双向多遍打印模式使用所定义的打印掩模在喷墨打印机上打印输入图像。

公开(公告)号：US08085436B2

公开(公告)日：2011-12-27

申请号：US12330552

申请日：2008-12-09

Applicant: Douglas W. Couwenhoven ,  Kevin E. Spaulding

Inventor： Douglas W. Couwenhoven ,  Kevin E. Spaulding

IPC: H04N1/60 ,  H04N1/40 ,  H04N1/46 ,  G03F3/08 ,  G06K9/00

CPC classification number: H04N1/60

Abstract: A method for printing an input digital image using a digital printer having a set of colorants with substantially the same color but different densities, including a sequence of node points where each of the two or more colorants are either at their maximum or minimum values, setting colorant concentrations such that the color channel output responses corresponding to the sequence of node points are substantially equally spaced in a visually uniform color space; forming colorant control look-up tables to provide smooth transitions in the color channel output response between the sequence of node points; addressing the colorant control look-up tables with the printer code value for each pixel of the input digital image to determine the colorant control signals for each of the two or more colorants; and controlling the digital printer using the colorant control signals to produce a print of the input digital image.

Abstract translation: 一种使用具有基本上相同颜色但不同密度的一组着色剂的数字打印机打印输入数字图像的方法，包括其中两个或更多个着色剂中的每一个处于其最大值或最小值的节点点序列，设置 着色剂浓度使得对应于节点点序列的颜色通道输出响应在视觉均匀的颜色空间中基本相等间隔; 形成着色剂控制查找表，以在节点间序列中的颜色通道输出响应中提供平滑过渡; 使用输入数字图像的每个像素的打印机代码值寻址着色剂控制查找表，以确定两种或更多种着色剂中的每一种的着色剂控制信号; 以及使用着色剂控制信号来控制数字打印机以产生输入数字图像的打印。