公开(公告)号：US20100231725A1

公开(公告)日：2010-09-16

申请号：US12404859

申请日：2009-03-16

申请人： Xiaoling Wang ,  Farhan A. Baqai ,  Takami Mizukura ,  Naoya Katoh

发明人： Xiaoling Wang ,  Farhan A. Baqai ,  Takami Mizukura ,  Naoya Katoh

IPC分类号： H04N17/02

CPC分类号： H04N9/735 ,  H04N2101/00

摘要： The color calibration using colored rays method achieves illuminant independence in calibrating digital still cameras. A constraint is developed using matrix-vector operations and properties of the Kronecker product. The constraint ensures similar calibration performance between colored rays set and the Macbeth ColorChecker. An optimization scheme using orthogonal non-negative matrix factorization with the new constraint is able to obtain the optimal colored rays set. Then, by acquiring an image of the optimal colored rays set, a camera is able to determine an adjustment matrix for color calibration. Experimental results show that compared to traditional calibration approach for digital still cameras, the colored rays approach gives smaller color error under various evaluation illuminants with only one shot needed.

摘要翻译： 使用彩色光线法进行颜色校准可实现校准数码相机中的光源独立性。 使用Kronecker产品的矩阵向量操作和属性开发约束。 该约束确保了彩色射线组与Macbeth ColorChecker之间的相似校准性能。 使用正交非负矩阵因式分解与新约束的优化方案能够获得最佳彩色射线集。 然后，通过获取最佳彩色射线组的图像，照相机能够确定用于颜色校准的调整矩阵。 实验结果表明，与传统的数码相机校准方法相比，彩色射线方法在各种评估光源下都能产生较小的颜色误差，只需一次。

公开(公告)号：US20090080004A1

公开(公告)日：2009-03-26

申请号：US11862107

申请日：2007-09-26

申请人： Xiaoling Wang ,  Farhan A. Baqai ,  Takami Mizukura ,  Naoya Katoh

发明人： Xiaoling Wang ,  Farhan A. Baqai ,  Takami Mizukura ,  Naoya Katoh

IPC分类号： H04N1/60

CPC分类号： H04N1/6033

摘要： A color chart for color calibration of imaging devices that has nearly identical calibration performance as the Macbeth ColorChecker or another set of reference colors, but with substantially fewer color patches. For example, the color chart has similar 2nd order statistical characteristics, auto-correlation matrix and major principal components as the Macbeth ColorChecker. The color chart is developed by applying Orthogonal Non-negative Matrix Factorization (ONMF) to the set of reference colors, using non-negativity and smoothness constraints to achieve physically realizable colors and using orthogonality constraints to obtain similar statistical properties to that of any input set of reflectances including, but not limited to, the Macbeth ColorChecker. Seven colors provide nearly identical calibration performance to that of twenty-four colors in the Macbeth ColorChecker.

摘要翻译： 具有与Macbeth ColorChecker或另一组参考颜色几乎相同的校准性能但具有实质上较少的色标的成像设备的颜色校准的颜色图表。 例如，彩色图表具有与Macbeth ColorChecker类似的二阶统计特征，自相关矩阵和主要主成分。 通过将正交非负矩阵因子分解（ONMF）应用于参考颜色集合，使用非消极性和平滑度约束来实现物理上可实现的颜色并使用正交约束来获得与任何输入集相似的统计特性来开发彩色图表 的反射，包括但不限于Macbeth ColorChecker。 在Macbeth ColorChecker中，七种颜色与二十四种颜色的校准性能几乎相同。

公开(公告)号：US20110234811A1

公开(公告)日：2011-09-29

申请号：US12732525

申请日：2010-03-26

申请人： Xiaoling Wang ,  Farhan Baqai ,  Takami Mizukura ,  Naoya Katoh

发明人： Xiaoling Wang ,  Farhan Baqai ,  Takami Mizukura ,  Naoya Katoh

IPC分类号： H04N9/73 ,  H04N17/00

CPC分类号： H04N17/002 ,  H04N1/603 ,  H04N17/02

摘要： Improving color calibration, and similar operations, by generating an optimal raw RGB color chart, in the raw RGB domain, for an imaging device with a given type of image sensor, such as for a digital still camera. Calibration is performed in response to a constraint which takes into account the spectral sensitivity of the image sensor used on the camera as well as spectral reflectance and spectral radiance of multiple illuminants. Calibration is performed using the raw RGB color chart which is illuminant independent and image sensor specific and which can match the calibration performance of known calibration standards, such as Macbeth 24.

摘要翻译： 通过在原始RGB域中为具有给定类型的图像传感器的成像装置（例如用于数字静态照相机）生成最佳的原始RGB颜色图来改善颜色校准和类似的操作。 响应于考虑到在相机上使用的图像传感器的光谱灵敏度以及多个光源的光谱反射率和光谱辐射度的约束来执行校准。 校准是使用独立的光源和图像传感器特定的原始RGB色彩图表进行的，可以匹配已知校准标准的校准性能，如Macbeth 24。

公开(公告)号：US07852380B2

公开(公告)日：2010-12-14

申请号：US11738443

申请日：2007-04-20

申请人： Xiaoling Wang ,  Alexander Berestov ,  Takami Mizukura ,  Naoya Katoh

发明人： Xiaoling Wang ,  Alexander Berestov ,  Takami Mizukura ,  Naoya Katoh

IPC分类号： H04N5/228

CPC分类号： H04N9/69 ,  G06T5/009

摘要： A signal processing system includes: defining a nonlinear function; defining a set of requirements for an output signal; obtaining an input signal; applying a cubic polynomial fitting to approximate the nonlinear function and provide an approximated nonlinear function; assigning a set of fitted polynomial parameters to the approximated nonlinear function; transforming the input signal with the approximated nonlinear function to provide a transformed signal; modifying the transformed signal by adjusting the set of fitted polynomial parameters to provide a modified signal meeting the set of requirements for the output signal; and outputting the modified signal.

摘要翻译： 信号处理系统包括：定义非线性函数; 定义输出信号的一组要求; 获取输入信号; 应用三次多项式拟合近似非线性函数并提供近似非线性函数; 将一组拟合的多项式参数分配给近似非线性函数; 用近似非线性函数变换输入信号以提供变换信号; 通过调整拟合的多项式参数的集合来修改变换的信号，以提供满足输出信号的要求的修改的信号; 并输出修正信号。

公开(公告)号：US20090322916A1

公开(公告)日：2009-12-31

申请号：US11738443

申请日：2007-04-20

申请人： Xiaoling Wang ,  Alexander Berestov ,  Takami Mizukura ,  Naoya Katoh

发明人： Xiaoling Wang ,  Alexander Berestov ,  Takami Mizukura ,  Naoya Katoh

IPC分类号： H04N5/202

CPC分类号： H04N9/69 ,  G06T5/009

摘要： A signal processing system includes: defining a nonlinear function; defining a set of requirements for an output signal; obtaining an input signal; applying a cubic polynomial fitting to approximate the nonlinear function and provide an approximated nonlinear function; assigning a set of fitted polynomial parameters to the approximated nonlinear function; transforming the input signal with the approximated nonlinear function to provide a transformed signal; modifying the transformed signal by adjusting the set of fitted polynomial parameters to provide a modified signal meeting the set of requirements for the output signal; and outputting the modified signal.

摘要翻译： 信号处理系统包括：定义非线性函数; 定义输出信号的一组要求; 获取输入信号; 应用三次多项式拟合近似非线性函数并提供近似非线性函数; 将一组拟合的多项式参数分配给近似非线性函数; 用近似非线性函数变换输入信号以提供变换信号; 通过调整拟合的多项式参数的集合来修改变换的信号，以提供满足输出信号的要求的修改的信号; 并输出修正信号。

公开(公告)号：US08570338B2

公开(公告)日：2013-10-29

申请号：US12462667

申请日：2009-08-06

申请人： Takami Mizukura ,  Naoya Katoh

发明人： Takami Mizukura ,  Naoya Katoh

IPC分类号： G09G5/02

CPC分类号： H04N1/6058

摘要： An information processing device includes: a color gamut information generating unit configured to generate color gamut information representing the color gamut of image data based on table information indicating the highest chroma point at each equal hue plane regarding a plurality of equal hue planes.

摘要翻译： 一种信息处理装置，包括：色域信息生成单元，被配置为基于表信息，根据表信息，生成表示图像数据的色域的色域信息，所述表信息指示关于多个相等的色相平面的每个相等色相平面处的最高色度点。

公开(公告)号：US07583303B2

公开(公告)日：2009-09-01

申请号：US10589492

申请日：2006-01-12

申请人： Takami Mizukura ,  Naoya Katoh ,  Kenji Tanaka ,  Masaya Kinoshita ,  Yutaka Yoneda ,  Akira Matsui

发明人： Takami Mizukura ,  Naoya Katoh ,  Kenji Tanaka ,  Masaya Kinoshita ,  Yutaka Yoneda ,  Akira Matsui

IPC分类号： H04N5/232 ,  H04N9/04

CPC分类号： H04N9/045 ,  H04N5/35563

摘要： An imaging device having a hybrid RGBYC color filter using a primary color system RGB filter and a complementary color system YC filter is composed. Four G filters that directly relate to resolution and that is close to a luminance signal that human eyes sense are arrayed in a checker shape so that the number of the G filters is four times larger than the number of filters of each of the other colors. An array shown in FIG. 10A is composed of low resolution rows (G, R, G, and B) and high resolution rows (C, G, Y, and G) that are alternately arrayed in each line. When signals are read if exposure times are varied for individual lines, the signals that are read can easily have a wide dynamic range. An array shown in FIG. 10B has two Gs, a low sensitivity color, and a high sensitivity color in each line and each row. Thus, the luminance difference is small in the horizontal direction and the vertical direction. Thus, the reading method in the array shown in FIG. 10B is slightly complicated than that in the array shown in FIG. 10A. However, since the special interpolation characteristic of the array shown in FIG. 10B is advantageous, a smooth gradation can be easily represented.

摘要翻译： 具有使用原色系统RGB滤色器和补色系YC滤色器的混合RGBYC滤色器的成像装置。 与分辨率直接相关并且靠近人眼感知的亮度信号的四个G滤波器以检验器形状排列，使得G滤波器的数量比每个其它颜色的滤波器数量的四倍。 图1所示的阵列。 10A由在每行交替排列的低分辨率行（G，R，G和B）和高分辨率行（C，G，Y和G）组成。 当各个线路的曝光时间变化时，如果读取信号，读取的信号可以容易地具有宽的动态范围。 图1所示的阵列。 10B具有两个G，低灵敏度颜色，以及每行和每一行的高灵敏度颜色。 因此，亮度差在水平方向和垂直方向上较小。 因此，图1所示的阵列中的读取方法 10B比图1所示的阵列略复杂。 10A。 然而，由于图1所示的阵列的特殊插值特性， 10B是有利的，可以容易地表示平滑的等级。

公开(公告)号：US08478039B2

公开(公告)日：2013-07-02

申请号：US12799804

申请日：2010-04-30

申请人： Takami Mizukura ,  Naoya Katoh

发明人： Takami Mizukura ,  Naoya Katoh

IPC分类号： G06K9/00

CPC分类号： H04N1/6058

摘要： An information processing device includes: a control unit to determine whether to perform, according to the relation between a gamut of an image subjected to gamut conversion beforehand and a target gamut, a first conversion processing to perform gamut conversion processing to convert the gamut of the image into the target gamut after performing restoring processing to return at least a portion of the image gamut into the state before the gamut conversion, and a second conversion processing to perform the gamut conversion processing without performing the restoring processing; a restoring unit to execute the restoring processing according to control by the control unit; and a gamut conversion unit to execute the gamut conversion processing according to control by the control unit.

摘要翻译： 信息处理装置包括：控制单元，用于根据预先进行色域转换的图像的色域与目标色域之间的关系来确定是否执行第一转换处理，以进行色域转换处理，以转换色域的色域 执行恢复处理以将至少一部分图像色域返回到色域转换之前的状态的图像转换成目标色域，以及进行色域转换处理而不执行恢复处理的第二转换处理; 恢复单元，用于根据控制单元的控制执行恢复处理; 以及色域转换单元，其根据控制单元的控制来执行色域转换处理。

公开(公告)号：US08325200B2

公开(公告)日：2012-12-04

申请号：US12316375

申请日：2008-12-10

申请人： Takami Mizukura ,  Naoya Katoh

发明人： Takami Mizukura ,  Naoya Katoh

IPC分类号： G09G5/02 ,  G03F3/08 ,  G06K9/00

CPC分类号： H04N1/6058

摘要： An information processing device, configured to perform color gamut conversion for compressing or enlarging the color gamut of image data, includes: a selecting unit configured to select a generating method of table information for specifying a non-mapping boundary which is a boundary between a region where the coordinate movement of a pixel to be processed is not performed, and a conversion source region where the coordinate movement of the pixel to be processed is performed, and a mapping limit boundary which is a boundary other than the non-mapping region, of the conversion source region, for each hue, from a plurality of generating methods according to a predetermined condition, with the color gamut conversion; and a table information generating unit configured to generate the table information using the method selected from the plurality of generating methods.

摘要翻译： 一种信息处理装置，被配置为执行用于压缩或放大图像数据的色域的色域转换，包括：选择单元，被配置为选择用于指定作为区域之间的边界的非映射边界的表信息的生成方法 其中不执行要处理的像素的坐标移动，以及执行要处理的像素的坐标移动的转换源区域和作为非映射区域以外的边界的映射限制边界， 根据预定条件的多种生成方法对色调的转换源区域进行色域转换; 以及表信息生成单元，被配置为使用从多个生成方法中选择的方法生成表信息。

公开(公告)号：US20060012808A1

公开(公告)日：2006-01-19

申请号：US10507870

申请日：2003-02-26

申请人： Takami Mizukura ,  Naoya Katoh ,  Ken Nakajima ,  Hiroki Nagahama

发明人： Takami Mizukura ,  Naoya Katoh ,  Ken Nakajima ,  Hiroki Nagahama

IPC分类号： G06F15/00

CPC分类号： H04N9/045

摘要： The present invention relates to an image processing apparatus and method in which more faithful colors are reproduced and noise is reduced, and to a method of manufacturing the image processing apparatus. A four-color color filter 61 is formed of a total of four filters, that is, an R filter that allows only red light to pass through, a B filter that allows only blue light to pass through, and a G1 filter that allows only green light in a first wavelength band to pass through, and a G2 filter, having a high correlation with the G1 filter, that allows only green light in a second wavelength band to pass through, the four filters defining a minimum unit. The G1 filter and the G2 filter are arranged at mutually diagonal positions within the minimum unit. RGB signals are generated in accordance with four kinds of signals which are transmitted through the four-color color filter 61 and which are obtained by an image sensor. The present invention can be applied to an image processing apparatus such as a digital camera.

摘要翻译： 本发明涉及一种图像处理装置和方法，其中再现更忠实的颜色并减少噪声，并且涉及一种制造图像处理装置的方法。 四色滤色器61由总共四个滤光器构成，即仅允许红光通过的R滤光器，仅允许蓝光通过的B滤光器和仅允许蓝光的G1滤光器 所述四个滤光器限定最小单位，所述G2滤光器与G1滤光器具有高相关性，所述G2滤光器仅允许第二波长带中的绿光通过。 G1滤波器和G2滤波器布置在最小单位内的相互对角线位置。 RGB信号根据通过四色滤色器61透射并由图像传感器获得的四种信号产生。 本发明可以应用于数字照相机等图像处理装置。