公开(公告)号：US09060164B2

公开(公告)日：2015-06-16

申请号：US13610907

申请日：2012-09-12

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： H04N17/00 ,  G08G1/04

CPC分类号： H04N17/002 ,  G08G1/04

摘要： A method for determining a response to misalignment of a camera monitoring a desired area includes acquiring temporal related frames from the camera including a reference frame. A pixel location is determined of a reference object from the frames. Using the pixel location of the reference object, a displacement of the camera between a current frame and the reference frame is determined. For the displacement exceeding a first threshold, a new displacement of the camera is measured by introducing at least one additional object to a camera field of view and comparing the new displacement to a second threshold. For the new displacement not exceeding the second threshold, the camera is recalibrated using a determined pixel location and a physical location of the at least one additional object. For the new displacement exceeding the second threshold, notification is provided of a misalignment to an associated user device.

摘要翻译： 用于确定对监视所需区域的相机的未对准的响应的方法包括从摄像机获取包括参考帧的时间相关帧。 从帧中确定参考对象的像素位置。 使用参考对象的像素位置，确定相机在当前帧与参考帧之间的位移。 对于超过第一阈值的位移，通过将至少一个附加对象引入照相机视野并将新位移与第二阈值进行比较来测量照相机的新位移。 对于不超过第二阈值的新位移，使用确定的像素位置和至少一个附加对象的物理位置来重新校准照相机。 对于超过第二阈值的新位移，向相关联的用户设备通知未对准。

公开(公告)号：US08861023B2

公开(公告)日：2014-10-14

申请号：US13023822

申请日：2011-02-09

申请人： Edul N. Dalal ,  Wencheng Wu ,  Robert J. Rolleston

发明人： Edul N. Dalal ,  Wencheng Wu ,  Robert J. Rolleston

IPC分类号： H04N1/60 ,  H04N1/54 ,  H04N1/62

CPC分类号： H04N1/54 ,  H04N1/603 ,  H04N1/628

摘要： What is disclosed is a novel system and method for determining and capturing the designer intended colors in an image so that the printer has an accurate color rendition target. The present method operates by capturing the monitor RGB values together with the monitor profile to get a representation of the intended image in a device-independent color space like L*a*b*. The teachings hereof work for vector graphics as well as raster images. Advantageously, this invention solves a real problem currently existing, for example, in the packaging print market, wherein colors produced from multiple spot colors with their overlays and blends are not well color managed.

摘要翻译： 公开的是用于确定和捕获图像中的设计者预期颜色的新型系统和方法，使得打印机具有准确的色彩再现目标。 本方法通过将监视器RGB值与监视器配置文件一起捕获来操作，以在与设备无关的颜色空间（如L * a * b *）中获得所需图像的表示。 这里的教学工作用于矢量图形以及光栅图像。 有利地，本发明解决了例如在包装印刷市场中存在的真实问题，其中由具有它们的覆盖物和共混物的多种专色产生的颜色不是很好的颜色管理。

公开(公告)号：US08797589B2

公开(公告)日：2014-08-05

申请号：US12859760

申请日：2010-08-19

申请人： Edul N. Dalal ,  Wencheng Wu

发明人： Edul N. Dalal ,  Wencheng Wu

IPC分类号： G06K15/00 ,  G06F15/00 ,  H04N1/407 ,  H04N1/46 ,  G03F3/08

CPC分类号： H04N1/6033 ,  G01J3/462

摘要： A computer-implemented method for color calibration and profiling of an output device includes measuring a color patch in a test pattern, which comprises a plurality of color patches, to obtain first image data; measuring the color patch in the test pattern to obtain second image data; transforming the first image data to a first estimated image data; determining a difference between the second image data and the first estimated image data to obtain a correction factor; and calculating, for each patch in the test pattern, a corrected image data by applying the correction factor to a subsequent estimated image data from the first sensor. The correction factor is used for correcting inaccuracies introduced when the first image data is transformed into the first estimated image data. The first image data and the second image data provide a measured color representation of the color patch in a device dependent color space and a device independent color space, respectively.

摘要翻译： 用于颜色校准和输出设备的轮廓的计算机实现的方法包括测量包括多个色块的测试图案中的色块以获得第一图像数据; 测量测试图案中的色块以获得第二图像数据; 将所述第一图像数据变换为第一估计图像数据; 确定第二图像数据和第一估计图像数据之间的差以获得校正因子; 以及通过将所述校正因子应用于来自所述第一传感器的后续估计图像数据来计算所述测试图案中的每个贴片的校正图像数据。 校正因子用于校正当第一图像数据被变换为第一估计图像数据时引入的不精确度。 第一图像数据和第二图像数据分别在设备依赖的颜色空间和设备独立的颜色空间中分别提供色标的测量的颜色表示。

公开(公告)号：US08605268B2

公开(公告)日：2013-12-10

申请号：US13039013

申请日：2011-03-02

申请人： Wencheng Wu ,  Edul N. Dalal ,  Beilei Xu

发明人： Wencheng Wu ,  Edul N. Dalal ,  Beilei Xu

IPC分类号： G01N21/00

CPC分类号： G03G15/0189 ,  G03G15/5062 ,  G03G2215/00063 ,  G03G2215/00067

摘要： A sensor used for determining area coverages of each colorant in a printed image is provided. The sensor includes a plurality of sensing elements for determining area coverages of each colorant in a printed image that includes a plurality of colorants including a black colorant. One of the sensing elements is an infrared sensing element configured to measure infrared reflection, and the others of the sensing elements are each configured to detect a visible color.

摘要翻译： 提供了用于确定印刷图像中每种着色剂的面积覆盖率的传感器。 传感器包括多个感测元件，用于确定印刷图像中每种着色剂的面积覆盖率，其包括多个包括黑色着色剂的着色剂。 感测元件中的一个是被配置为测量红外反射的红外感测元件，并且其它感测元件被配置为检测可见颜色。

公开(公告)号：US08531731B2

公开(公告)日：2013-09-10

申请号：US12727692

申请日：2010-03-19

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： G06T5/00

CPC分类号： H04N1/6033 ,  H04N1/58

摘要： What is disclosed is a novel system and method for determining printer performance in terms of image quality defects over a large complex set of conditions based on measurements taken over a small simple set of conditions, thus reducing the amount of time, effort, and wasted paper required to obtain the data. The present system and method effectively utilizes a predictive model that predicts noise measurements of multi-separations from those of single-separation colors and/or a subset of the multi-separations. Because a model is used to comprehend color performance over the entire gamut, the number of patches is reduced. This reduction enables the method to be used within a machine to dynamically characterize the device's image quality performance. Various embodiments have been disclosed.

摘要翻译： 公开的是一种新颖的系统和方法，用于基于在一小组简单的条件下测量所获得的大型复杂条件下的图像质量缺陷来确定打印机性能，从而减少了时间，精力和浪费纸张的数量 需要获取数据。 本系统和方法有效地利用预测多分离与单分离颜色和/或多分离子集的噪声测量的预测模型。 由于使用模型来了解整个色域的颜色性能，因此可以减少补丁的数量。 这种减少使得可以在机器内使用该方法来动态地表征设备的图像质量性能。 已经公开了各种实施例。

公开(公告)号：US08068695B2

公开(公告)日：2011-11-29

申请号：US12266624

申请日：2008-11-07

申请人： Edul N. Dalal ,  Wencheng Wu

发明人： Edul N. Dalal ,  Wencheng Wu

IPC分类号： G06K9/32

CPC分类号： G06K9/3275

摘要： A de-warp map is generated by applying principal component analysis (PCA) to vectors describing aspects of identified features of an object in an image. PCA provides vectors and coefficients describing curvature or image warping at selected points in the image. Estimates of the warping of the image generally are generated by interpolation and/or extrapolation from the vectors and coefficients provided by PCA. In some applications only two features need be identified. For example, the complicated curvature of the facing pages of an open book can be characterized by two vectors describing positions of top and bottom edges of the book. In such applications PCA can reduce to vector subtraction to determine a basis vector, vector addition and scaling to determine an average vector and simple assignment of known coefficient values. The de-warping map can be used to generate a de-warped version of the image.

摘要翻译： 通过将主成分分析（PCA）应用于描述图像中的物体的已识别特征的方面的矢量来生成去扭曲图。 PCA提供描述图像中所选点的曲率或图像变形的向量和系数。 图像翘曲的估计通常由PCA提供的向量和系数的插值和/或外插产生。 在某些应用中，只需要识别两个特征。 例如，打开的书的面对页面的复杂曲率可以由描述书籍的顶部和底部边缘的位置的两个向量来表征。 在这种应用中，PCA可以减少到矢量减法，以确定基矢量，向量加法和缩放以确定平均矢量并简单分配已知系数值。 去翘曲图可用于生成图像的去翘曲版本。

公开(公告)号：US20100284615A1

公开(公告)日：2010-11-11

申请号：US12437660

申请日：2009-05-08

申请人： Edul N. Dalal ,  Patrick R. Harrington ,  Wencheng Wu

发明人： Edul N. Dalal ,  Patrick R. Harrington ,  Wencheng Wu

IPC分类号： G06K9/00

CPC分类号： H04N1/54 ,  H04N1/4015 ,  H04N1/6033

摘要： Colorant recipes for spot colors, or colors associated with vector graphic objects, are transformed to compensate for spatial variation in a rendering device. Inverted Jacobians of color production performance can be used to transform color deviations into colorant recipe changes. The colorant recipe changes are applied to original colorant recipes to provide the transformed colorant recipes. Jacobians can be determined by exercising a system model according to perturbations of the colorant recipes. Alternatively, test patches or strips based on perturbed original colorant recipes can be rendered and measured and the Jacobians can be based on such measurements. Alternatively, spatially dependent tone reproduction curves can be used to transform the colorant recipes associated with the vector graphic objects. Image processing systems can include a spatial variation information determiner, a spatial compensation information determiner and a colorant recipe transformer.

摘要翻译： 用于专色的颜色配方或与矢量图形对象相关联的颜色进行变换，以补偿渲染设备中的空间变化。 反色Jacobians的色彩生产性能可用于将颜色偏差转化为色素配方更改。 着色剂配方变化适用于原始着色剂配方以提供转化的着色剂配方。 Jacobians可以通过根据着色剂配方的扰动行使系统模型来确定。 或者，可以渲染和测量基于干扰的原始着色剂配方的测试贴片或条纹，并且Jacobians可以基于这样的测量。 或者，空间依赖色调再现曲线可用于变换与矢量图形对象相关联的着色剂配方。 图像处理系统可以包括空间变化信息确定器，空间补偿信息确定器和着色剂配方变换器。

公开(公告)号：US20100119158A1

公开(公告)日：2010-05-13

申请号：US12266624

申请日：2008-11-07

申请人： Edul N. Dalal ,  Wencheng Wu

发明人： Edul N. Dalal ,  Wencheng Wu

IPC分类号： G06K9/48 ,  G06K9/40

CPC分类号： G06K9/3275

摘要： A de-warp map is generated by applying principal component analysis (PCA) to vectors describing aspects of identified features of an object in an image. PCA provides vectors and coefficients describing curvature or image warping at selected points in the image. Estimates of the warping of the image generally are generated by interpolation and/or extrapolation from the vectors and coefficients provided by PCA. In some applications only two features need be identified. For example, the complicated curvature of the facing pages of an open book can be characterized by two vectors describing positions of top and bottom edges of the book. In such applications PCA can reduce to vector subtraction to determine a basis vector, vector addition and scaling to determine an average vector and simple assignment of known coefficient values. The de-warping map can be used to generate a de-warped version of the image.

摘要翻译： 通过将主成分分析（PCA）应用于描述图像中的物体的已识别特征的方面的矢量来生成去扭曲图。 PCA提供描述图像中所选点的曲率或图像变形的向量和系数。 图像翘曲的估计通常由PCA提供的向量和系数的插值和/或外插产生。 在某些应用中，只需要识别两个特征。 例如，打开的书的面对页面的复杂曲率可以由描述书籍的顶部和底部边缘的位置的两个向量来表征。 在这种应用中，PCA可以减少到矢量减法，以确定基矢量，向量加法和缩放以确定平均矢量，并简单分配已知系数值。 去翘曲图可用于生成图像的去翘曲版本。

公开(公告)号：US07486416B2

公开(公告)日：2009-02-03

申请号：US11143818

申请日：2005-06-02

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

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

IPC分类号： H04N1/60 ,  H04N1/04 ,  G03F3/08 ,  G06K15/00 ,  G06K9/00

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).

摘要翻译： 从空间依赖的着色剂外观不均匀性的其他方面鉴定和分离空间依赖性着色剂相互作用效应。 确定用于补偿所识别的空间依赖着色剂相互作用效应的去相关函数。 还可以确定用于补偿空间依赖着色剂外观不均匀性的其它方面的空间依赖性单色剂补偿功能。 图像数据通过去相关功能进行处理，从而产生对空间依赖的着色剂相互作用效应进行补偿的着色剂值。 可选地，还通过空间依赖的单一着色剂补偿功能来处理图像数据，由此产生着色剂值，其对着色剂外观不均匀性的两个方面进行补偿。 可以在不同的空间和时间频率或分辨率下确定，校准和/或存储两种补偿功能。 可以采用一种或两种补偿功能来保持多个渲染设备（例如，标记引擎）之间的一致性。

公开(公告)号：US20140071281A1

公开(公告)日：2014-03-13

申请号：US13610907

申请日：2012-09-12

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： H04N17/00

CPC分类号： H04N17/002 ,  G08G1/04

摘要： A method for determining a response to misalignment of a camera monitoring a desired area includes acquiring temporal related frames from the camera including a reference frame. A pixel location is determined of a reference object from the frames. Using the pixel location of the reference object, a displacement of the camera between a current frame and the reference frame is determined. For the displacement exceeding a first threshold, a new displacement of the camera is measured by introducing at least one additional object to a camera field of view and comparing the new displacement to a second threshold. For the new displacement not exceeding the second threshold, the camera is recalibrated using a determined pixel location and a physical location of the at least one additional object. For the new displacement exceeding the second threshold, notification is provided of a misalignment to an associated user device.

摘要翻译： 用于确定对监视所需区域的相机的未对准的响应的方法包括从摄像机获取包括参考帧的时间相关帧。 从帧中确定参考对象的像素位置。 使用参考对象的像素位置，确定相机在当前帧与参考帧之间的位移。 对于超过第一阈值的位移，通过将至少一个附加对象引入照相机视野并将新位移与第二阈值进行比较来测量照相机的新位移。 对于不超过第二阈值的新位移，使用确定的像素位置和至少一个附加对象的物理位置来重新校准照相机。 对于超过第二阈值的新位移，向相关联的用户设备通知未对准。