公开(公告)号：US07375851B2

公开(公告)日：2008-05-20

申请号：US10348263

申请日：2003-01-21

申请人： Lalit K. Mestha

发明人： Lalit K. Mestha

IPC分类号： H04N1/60 ,  H04N1/50

CPC分类号： H04N1/60 ,  H04N1/6033

摘要： The color management system comprises a state-space based model for a pixel element in a dynamically varying color marking device. A sensor measures the color of the printed output for construction of a selected set of sensitivity functions representative of color output relating to inputs. The gradients of the sensitivity functions are extracted and used to develop the corresponding discrete multivariable state-space model of the pixel element. More particularly, the model is constructed from the Jacobian matrix characterizing a change in measured color output for a change in input color values of the pixel. Extension of modeling methodology for a single pixel is applied to multiple pixel elements.

摘要翻译： 颜色管理系统包括基于状态空间的模型，用于动态变化的颜色标记装置中的像素元件。 传感器测量打印输出的颜色，以构建表示与输入相关的颜色输出的所选择的一组灵敏度函数。 提取灵敏度函数的梯度，并用于开发像素元素的相应离散多变量状态空间模型。 更具体地，该模型由雅可比矩阵构成，其表征用于像素的输入颜色值的变化的测量的颜色输出的变化。 将单个像素的建模方法的扩展应用于多个像素元素。

公开(公告)号：US20080043264A1

公开(公告)日：2008-02-21

申请号：US11507406

申请日：2006-08-21

申请人： Alvaro E. Gil ,  Lalit K. Mestha

发明人： Alvaro E. Gil ,  Lalit K. Mestha

IPC分类号： G03F3/08

CPC分类号： H04N1/62

摘要： A method of color management for image marking devices utilizes an automated spot color editor having a control module accessing a graphical user interface. The method includes receiving image data input, in either device-dependent color space or device-independent color space, for a marking job. It is determined whether spot colors are present within the image data input and whether the CMYK values for each of the spot colors present within the image data input are included in the marking device spot color dictionary. Operational parameters for the automated spot color editor are initialized, with operational parameters including the desired performance criteria to be minimized by the automated spot color editor through selection of one or more matrices from a plurality of possible gain matrices to identify new CMYK values. The quality level of the new CMYK values is assessed and new CMYK values are transmitted to image printing device(s).

摘要翻译： 图像标记装置的颜色管理方法利用具有访问图形用户界面的控制模块的自动专色编辑器。 该方法包括接收针对设备相关的颜色空间或与设备无关的颜色空间中的图像数据输入用于标记作业。 确定在图像数据输入中是否存在专色，以及是否在图像数据输入中存在的每个专色的CMYK值被包括在标记装置专色字典中。 通过从多个可能的增益矩阵中选择一个或多个矩阵来识别新的CMYK值，自动专色编辑器的操作参数被初始化，操作参数包括期望的性能标准，以通过自动专色编辑器最小化。 评估新的CMYK值的质量水平，并将新的CMYK值传输到图像打印设备。

公开(公告)号：US07110142B2

公开(公告)日：2006-09-19

申请号：US09985419

申请日：2001-11-02

申请人： Lalit K. Mestha ,  Eli S. Saber

发明人： Lalit K. Mestha ,  Eli S. Saber

IPC分类号： H04N1/60

CPC分类号： H04N1/6033 ,  G03G2215/00042

摘要： A multiple-LED sensor is used to detect area coverage of marked patches on a marking substrate. The same sensor may also be used for color calibration. The marking substrate area coverage sensor obtains reflectance measurements from marked patches of a marking substrate. For example, the marked patches may be patches of a marking substance such as toner, ink or paint, or patches marked by etching or the like. A Neugebauer model may be used to obtain the reflectance measurements. A batch least squares algorithm may be used to estimate the appropriate parameters of the Neugebauer model. For improved accuracy, a recursive least squares algorithm may be used. The recursive least squares algorithm allows the marking substrate area coverage sensor to calibrate itself to changes in the sensing environment.

公开(公告)号：US06587793B2

公开(公告)日：2003-07-01

申请号：US09953361

申请日：2001-09-17

申请人： Daniel E. Viassolo ,  Lalit K. Mestha

发明人： Daniel E. Viassolo ,  Lalit K. Mestha

IPC分类号： G01N2910

CPC分类号： G01J3/28 ,  G01J3/501 ,  G01J3/524 ,  G01N2291/044

摘要： An LED-based spectrophotometer uses a reconstruction algorithm, based on spectral information of an illumination source and a reference spectrophotometer, to convert integrated multiple illuminant measurements from a non-fully illuminant populated color sensor into a fully populated spectral curve using a reference database. A non-linear model, such as a fuzzy inference system (FIS), is used to reconstruct spectra.

摘要翻译： 基于LED的分光光度计使用基于照明源和参考分光光度计的光谱信息的重建算法，使用参考数据库将来自非完全照明的填充颜色传感器的集成多个光源测量值转换为完全填充的光谱曲线。 使用诸如模糊推理系统（FIS）的非线性模型来重建光谱。