公开(公告)号：US06724934B1

公开(公告)日：2004-04-20

申请号：US09562432

申请日：2000-05-01

申请人： Seong-deok Lee ,  Chang-young Kim ,  Du-sik Park ,  Yang-seock Seo ,  Jeong-yeop Kim

发明人： Seong-deok Lee ,  Chang-young Kim ,  Du-sik Park ,  Yang-seock Seo ,  Jeong-yeop Kim

IPC分类号： G06K900

CPC分类号： G09G5/02 ,  H04N9/646 ,  H04N9/67

摘要： A method and apparatus for generating a white signal component and for controlling the brightness of an image are provided. In the above method and apparatus, the brightness increases of Red, Green and Blue, the saturations of which are not decreased from an input image are calculated using a vector, and the minimum value of such increases is utilized as the input value for the white component. Further, by adding brightness control components of RGB color to the input RGB signals, brightness increases in the direction of the original colors instead of the achromatic one are possible, which is the way the white component is added so as to increase the luminance of color display devices representing a color using a color filter such a flat panel display. Accordingly, a color saturation of the image is not decreased even with addition of the achromatic color a component. In other words, in converting a signal from the three colors such as RGB into the four colors inclusive of white component, the present invention is capable of increasing the brightness without reduction of saturation as well as extracting the white component in an easy and efficient way, which enhances the performance of image processing apparatuses such as color display devices and the like.

摘要翻译： 提供了一种用于产生白色信号分量并用于控制图像的亮度的方法和装置。 在上述方法和装置中，红色，绿色和蓝色的亮度增加使用向量计算其输入图像的饱和度不降低，并且这种增加的最小值被用作白色的输入值 零件。 此外，通过向输入的RGB信号添加RGB颜色的亮度控制分量，可以在原色方向上增加亮度而不是消色差，这是添加白色分量以增加颜色亮度的方式 使用诸如平板显示器的滤色器表示颜色的显示设备。 因此，即使添加无色成分，也不会降低图像的色彩饱和度。 换句话说，在将诸如RGB的三种颜色的信号转换为包括白色分量的四种颜色的情况下，本发明能够在不降低饱和度的同时提高亮度以及以简单有效的方式提取白色分量 ，这增强了诸如彩色显示装置等的图像处理装置的性能。

公开(公告)号：US06594384B1

公开(公告)日：2003-07-15

申请号：US09562892

申请日：2000-05-01

申请人： Jeong-yeop Kim ,  Seong-deok Lee ,  Du-sik Park ,  Chang-young Kim ,  Yang-seock Seo

发明人： Jeong-yeop Kim ,  Seong-deok Lee ,  Du-sik Park ,  Chang-young Kim ,  Yang-seock Seo

IPC分类号： G06K900

CPC分类号： G06K9/4661 ,  G06K9/4652 ,  G06T7/90 ,  G06T2207/10024 ,  H04N1/6077 ,  H04N1/6086

摘要： A method and apparatus for estimating illuminant chromaticity and a method and apparatus for converting the estimated illuminant chromaticity into desired illuminant chromaticity using software are provided. The apparatus for estimating illuminant chromaticity includes an image input unit for receiving a color image, a highlight detector for extracting highlight regions from the color image, a highlight parameter calculator for mapping the highlight regions to chromaticity coordinates and calculating geometric presentation parameters of the shape of the distribution of chromaticity coordinates, a perceived illumination illuminant chromaticity estimator for estimating illuminant chromaticity in the color image using a perceived illumination estimate scheme, and a correct chromaticity calculator for selecting a predetermined number of geometric presentation parameters near the illuminant chromaticity estimated by the perceived illumination illuminant chromaticity estimator among the geometric presentation parameters and calculating final illuminant chromaticity using the selected geometric presentation parameters. The method for estimating illuminant chromaticity using perceived illumination and highlights is used for estimating illuminant chromaticity from a color image. This method, which is a combination of two kinds approaches, a perceived illumination estimate scheme and a highlight estimate scheme, considers the characteristics of highlights based on stable illuminant chromaticity estimated from perceived illumination, thereby improving accuracy.

摘要翻译： 提供了一种用于估计光源色度的方法和装置，以及用于使用软件将所估计的发光色度转换成所需光源色度的方法和装置。 用于估计发光色度的装置包括用于接收彩色图像的图像输入单元，用于从彩色图像中提取高光区域的高光检测器，用于将高亮区域映射到色度坐标的高亮度参数计算器，并计算形状的几何呈现参数 色度坐标的分布，用于使用感知照明估计方案估计彩色图像中的光色度的感知照明光源色度估计器，以及用于选择由感知照明估计的光源色度附近的预定数量的几何呈现参数的正确色度计算器 使用所选择的几何呈现参数来计算最终光源色度。 用于使用感知照明和高光来估计光源色度的方法用于从彩色图像估计光源色度。 该方法是两种方法的组合，感知照明估计方案和高亮度估计方案，基于从感知照明估计的稳定光源色度来考虑高光特性，从而提高准确度。

公开(公告)号：US06876764B2

公开(公告)日：2005-04-05

申请号：US10376485

申请日：2003-03-03

申请人： Seong-deok Lee ,  Chang-young Kim ,  Du-sik Park ,  Yang-seock Seo ,  Jeong-yeop Kim

发明人： Seong-deok Lee ,  Chang-young Kim ,  Du-sik Park ,  Yang-seock Seo ,  Jeong-yeop Kim

IPC分类号： H04N9/68 ,  G06K9/00 ,  G09G1/28 ,  G09G3/20 ,  G09G5/02 ,  G09G5/10 ,  H04N9/64 ,  H04N9/67 ,  H04N9/77

CPC分类号： G09G5/02 ,  H04N9/646 ,  H04N9/67

摘要： A method and apparatus for generating a white signal component and for controlling the brightness of an image are provided. In the above method and apparatus, the brightness increases of Red, Green and Blue, the saturations of which are not decreased from an input image are calculated using a vector, and the minimum value of such increases is utilized as the input value for the white component. Further, by adding brightness control components of RGB color to the input RGB signals, brightness increases in the direction of the original colors instead of the achromatic one are possible, which is the way the white component is added so as to increase the luminance of color display devices representing a color using a color filter such a flat panel display. Accordingly, a color saturation of the image is not decreased even with addition of the achromatic color component. In other words, in converting a signal from the three colors such as RGB into the four colors inclusive of white component, the present invention is capable of increasing the brightness without reduction of saturation as well as extracting the white component in an easy and efficient way, which enhances the performance of image processing apparatuses such as color display devices and the like.

摘要翻译： 提供了一种用于产生白色信号分量并用于控制图像的亮度的方法和装置。 在上述方法和装置中，红色，绿色和蓝色的亮度增加使用向量计算其输入图像的饱和度不降低，并且这种增加的最小值被用作白色的输入值 零件。 此外，通过向输入的RGB信号添加RGB颜色的亮度控制分量，可以在原色方向上增加亮度而不是消色差，这是添加白色分量以增加颜色亮度的方式 使用诸如平板显示器的滤色器表示颜色的显示设备。 因此，即使添加无彩色成分，也不会降低图像的色彩饱和度。 换句话说，在将诸如RGB的三种颜色的信号转换为包括白色分量的四种颜色的情况下，本发明能够在不降低饱和度的同时提高亮度以及以简单有效的方式提取白色分量 ，这增强了诸如彩色显示装置等的图像处理装置的性能。

公开(公告)号：US06639628B1

公开(公告)日：2003-10-28

申请号：US09425674

申请日：1999-10-22

申请人： Seong-deok Lee ,  Chang-Young Kim ,  Du-sik Park ,  Yang-seock Seo ,  Jeong-yeop Kim

发明人： Seong-deok Lee ,  Chang-Young Kim ,  Du-sik Park ,  Yang-seock Seo ,  Jeong-yeop Kim

IPC分类号： H04N973

CPC分类号： H04N9/735

摘要： An apparatus and method for processing color images are provided. The apparatus includes a color conversion unit for white-transforming signals in RGB space. The color conversion unit includes a first white-transforming means for white-transforming signals in RGB space to signals in a predetermined color space using N predetermined illuminant colors, and a second white-transforming means for white-transforming the signals in the predetermined color space to the signals in RGB space using M predetermined color temperatures of the display means, so that a natural color image or an image of a desirable color can be obtained without information with respect to the illuminant.

摘要翻译： 提供了一种用于处理彩色图像的设备和方法。 该装置包括用于在RGB空间中白化变换信号的颜色转换单元。 颜色转换单元包括：第一白变换装置，用于将RGB空间中的信号白变换为使用N个预定光源颜色的预定颜色空间中的信号;以及第二白变换装置，用于对预定颜色空间中的信号进行白变换 使用M个显示装置的预定色温，在RGB空间中的信号，从而可以获得关于照明器的信息的自然彩色图像或期望颜色的图像。

公开(公告)号：US06249601B1

公开(公告)日：2001-06-19

申请号：US09245066

申请日：1999-02-05

申请人： Jeong-yeop Kim ,  Seong-deok Lee ,  Chang-yeong Kim ,  Yang-seok Seo

发明人： Jeong-yeop Kim ,  Seong-deok Lee ,  Chang-yeong Kim ,  Yang-seok Seo

IPC分类号： G06K900

CPC分类号： G01J3/46 ,  G01J3/462 ,  G01J3/465 ,  G06K9/4661 ,  H04N1/6086 ,  H04N9/735

摘要： A method for determining the color of an illuminant and an apparatus therefor are provided. The method for determining the color of the illuminant according to the present invention includes the steps of obtaining an RGB mean vector value by selecting an arbitrary image and calculating a mean value in each RGB channel with respect to the image, defining a predetermined coefficient f which is a positive integer larger than 1 and estimating a value obtained by multiplying f by the RGB mean vector value as temporary color of the illuminant with respect to the selected image, estimating the illuminant color closest to the temporarily estimated illuminant color temperature on the day light locus as an illuminant color temperature, setting a value obtained by multiplying k by the estimated color of the illuminant as a self luminous threshold value in order to establish a self luminous area using a human visual characteristic wherein k is a predetermined coefficient which is a positive integer larger than 1, generating an image from which the self luminous threshold value is removed by removing the self luminous area having the RGB value exceeding the self luminous threshold value, and calculating the color of an illuminant from the uv chrominance value of the image from which the self luminous area is removed and outputting the illuminant color. It is possible to stably and effectively extract information of an illuminant by selectively excluding a self luminous area from a visually sensed image in the method for detecting the illuminant color according to the present invention.

摘要翻译： 提供了一种用于确定照明器的颜色的方法及其装置。 根据本发明的用于确定光源的颜色的方法包括以下步骤：通过选择任意图像并计算相对于图像的每个RGB通道中的平均值来获得RGB平均矢量值，定义预定系数f，其中 是大于1的正整数，并且估计通过将f乘以RGB平均矢量值作为相对于所选择的图像的光源的临时颜色获得的值，估计在日光下与临时估计的光源色温最接近的光源颜色 轨迹作为光源色温，将通过将k的估计颜色乘以自发光阈值而获得的值设置为使用人类视觉特性来建立自发光区域，其中k是正值的预定系数 生成大于1的整数，生成去除了自发光阈值的图像 通过去除RGB值超过自发光阈值的自发光区域，并且根据去除了自发光区域的图像的uv色度值计算发光体的颜色并输出光源颜色。 在本发明的检测光源颜色的方法中，通过选择性地从视觉感测图像中排除自发光区域，可以稳定有效地提取照明物的信息。