公开(公告)号：KR100519978B1

公开(公告)日：2005-10-13

申请号：KR1020030095644

申请日：2003-12-23

Applicant: 한국전자통신연구원

Inventor： 김진서 ,  강병호 ,  조맹섭 ,  최병태

IPC: H04N5/208

Abstract: 본 발명은 동영상 인지 모델을 이용한 영상 화질 개선 장치 및 그 방법에 관한 것이다. 본 발명의 영상 화질 개선 장치 및 그 방법에 따르면, 입력되는 동영상 프레임에 대하여 장치 특성화 작업을 통해 장치와 무관하게 일관된 컬러의 영상으로 변환을 수행하고, 프레임별 영상 분석을 통해 추출한 동영상 인지 모델 파라미터를 적용하여 영상 변환을 수행하고, 변환된 동영상을 방송용 TV나 영화 상영용 스크린과 유사한 장치에 디스플레이하며, 디스플레이된 동영상에 대하여 규정된 수의 관찰자를 통한 컬러 및 색감 비교 및 화질 선호 데이터를 수집하고, 수집된 데이터를 이용하여 최종으로 동영상 인지 모델 및 관찰자 평가 데이터가 적용된 미디어/컨텐츠 적응형 디지털 영상 컨텐츠를 생성할 수 있다.

公开(公告)号：KR100461018B1

公开(公告)日：2004-12-09

申请号：KR1020020065127

申请日：2002-10-24

Applicant: 한국전자통신연구원

Inventor： 김대희 ,  조맹섭 ,  강병호 ,  김진서 ,  김재철 ,  정재영 ,  허태욱 ,  홍상기

IPC: H04N9/73

Abstract: PURPOSE: A device and a method for generating a natural image of a digital television are provided to apply a matrix coefficient for generating a natural image to a chip set of color conversion, and then to correct an input image for colors of sky blue, flesh tone, etc., thereby factually approaching natural colors. CONSTITUTION: An input image converter(210) converts digital RGB(Red/Green/Blue) signals into a value of L*a*b. A natural color extractor(220) discriminates whether pixels of an input image have a natural color by using the converted L*a*b value. A matrix application unit(230) applies a matrix of a corresponding natural color to the input pixels discriminated to have the natural color in the natural color extractor(220). An output image generator(240) generates the image obtained through the matrix application unit(230) to have a new digital RGB value. The natural color extractor(220) calculates a hue value after converting the data inputted from the input image converter(210) into the L*a*b value in order to discriminate whether the calculated value belongs to a natural color.

Abstract translation: 目的：提供一种用于产生数字电视的自然图像的设备和方法，用于将用于生成自然图像的矩阵系数应用于颜色转换的芯片组，然后对天蓝色，肉色的输入图像进行校正 色调等，从而真正接近自然色彩。 构成：输入图像转换器（210）将数字RGB（红/绿/蓝）信号转换为L * a * b的值。 自然色提取器（220）通过使用经转换的L * a * b值来判别输入图像的像素是否具有自然色。 矩阵施加单元（230）将自然色的矩阵施加到在自然色提取器（220）中被辨别为具有自然色的输入像素。 输出图像生成器（240）生成通过矩阵施加单元（230）获得的图像以具有新的数字RGB值。 自然色提取器（220）在将从输入图像转换器（210）输入的数据转换成L * a * b值之后计算色调值，以便区分计算出的值是否属于自然色。

公开(公告)号：KR100439172B1

公开(公告)日：2004-07-05

申请号：KR1020010073397

申请日：2001-11-23

Applicant: 한국전자통신연구원

Inventor： 김재철 ,  조맹섭 ,  강병호 ,  김진서 ,  정재영 ,  허태욱 ,  홍상기 ,  김대희

IPC: H04N5/57

Abstract: PURPOSE: A constant luminance controller of an HDTV and a method for generating and outputting constant luminance are provided to find a constant luminance value close to the color of the original image to produce images with high picture quality. CONSTITUTION: A constant luminance controller of an HDTV includes a luminance controller(1), a luminance comparator(104), and a signal converter(106). The luminance controller generates and stores a look-up table in which a predetermined constant luminance value of an image with high picture quality and a reference luminance value of a general image are contrasted with each other. The luminance comparator compares the reference luminance value with the luminance value of an input image. The signal converter extracts a constant luminance value corresponding to the reference luminance value when the luminance values compared with each other are similar to each other and converts the image into RGB signals using the extracted constant luminance value.

Abstract translation: 目的：提供HDTV的恒定亮度控制器和用于产生和输出恒定亮度的方法，以找到接近原始图像的颜色的恒定亮度值，以产生具有高图像质量的图像。 构成：HDTV的恒定亮度控制器包括亮度控制器（1），亮度比较器（104）和信号转换器（106）。 亮度控制器生成并存储查找表，在该查找表中，具有高图片质量的图像的预定恒定亮度值和普通图像的基准亮度值彼此对比。 亮度比较器将参考亮度值与输入图像的亮度值进行比较。 当彼此比较的亮度值彼此相似时，信号转换器提取对应于参考亮度值的恒定亮度值，并使用所提取的恒定亮度值将图像转换为RGB信号。

公开(公告)号：KR100416231B1

公开(公告)日：2004-01-31

申请号：KR1020010069471

申请日：2001-11-08

Applicant: 한국전자통신연구원

Inventor： 강병호 ,  김진서 ,  김재철 ,  허태욱 ,  정재영 ,  김대희 ,  홍상기 ,  조맹섭

IPC: G06T3/00

Abstract: PURPOSE: An apparatus and a method for extending linear color gamut of a color device are provided to linearly extend color gamut when relatively narrow color gamut is converted into a relatively wide color gamut, to improve picture quality. CONSTITUTION: An apparatus for extending linear color gamut of a color device includes an input color coordinate converter(210), a color gamut extension unit(220), a color gamut storage unit(230), and an output color coordinate converter(240). The input color coordinate converter receives red, green and blue color coordinates from a color device(100) with narrow color gamut to convert the color coordinates into color coordinates of luminance, chrominance and hue. The color gamut extension unit extends color attributes of luminance, chrominance and hue according to linear extension equation to convert the color attributes. The color gamut storage unit controls the color attribute information extended by the color gamut extension unit not to come out of a relatively wide color gamut device(300). The output color coordinate converter inverse-transforms the color attribute information into red, green and blue color coordinates to transmit the color coordinates to the wide color gamut device.

Abstract translation: 目的：提供一种用于扩展彩色设备的线性色域的设备和方法，以在相对窄的色域被转换成相对较宽的色域时线性地扩展色域，以改善图像质量。 一种用于扩展彩色装置的线性色域的设备，包括输入色坐标转换器（210），色域扩展单元（220），色域存储单元（230）和输出色坐标转换器（240） 。 输入色坐标转换器从具有窄色域的彩色设备（100）接收红色，绿色和蓝色色坐标，以将色坐标转换为亮度，色度和色调的色坐标。 色域扩展单元根据线性扩展方程来扩展亮度，色度和色调的颜色属性以转换颜色属性。 色域存储单元控制由色域扩展单元扩展的颜色属性信息不会从相对较宽的色域设备（300）中出来。 输出颜色坐标转换器将颜色属性信息逆转换为红色，绿色和蓝色坐标，以将颜色坐标传输到宽色域设备。

公开(公告)号：KR100392369B1

公开(公告)日：2003-07-22

申请号：KR1020000083270

申请日：2000-12-27

Applicant: 한국전자통신연구원

Inventor： 김진서 ,  조맹섭 ,  강병호 ,  김홍기 ,  윤창락 ,  한규서

IPC: H04N9/64

Abstract: PURPOSE: A device of transceiving digital broadcasting video signals is provided to add a step of reproducing constant luminance signals during gamma correction, to minimize color information lost during a conversion process, thereby reproducing colors that are not expressed in an existing broadcasting video signal. CONSTITUTION: An input unit inputs video signals. A camera gamma linearizer(301) converts the inputted video signals into linearized R, G, B video signals to remove gamma characteristics of a camera. A luminance signal calculator(302) calculates a luminance signal by using the linearized R, G, B video signals. A gamma converter(303) performs a gamma conversion for the calculated luminance signal and the linearized B, R video signals, by applying the gamma characteristics. A color difference signal calculator(304) calculates the gamma-converted B, R video signals as broadcasting color difference signals. An output unit outputs the gamma-converted luminance signal and the broadcasting color difference signals.

Abstract translation: 目的：提供一种收发数字广播视频信号的设备，以在伽马校正期间添加再现恒定亮度信号的步骤，以最小化在转换处理期间丢失的颜色信息，从而再现在现有广播视频信号中未表达的颜色。 构成：输入单元输入视频信号。 照相机伽玛线性化器（301）将输入的视频信号转换为线性化的R，G，B视频信号以去除照相机的伽马特性。 亮度信号计算器（302）通过使用线性化的R，G，B视频信号来计算亮度信号。 伽马转换器（303）通过应用伽玛特性对所计算的亮度信号和线性化的B，R视频信号执行伽马转换。 色差信号计算器（304）将经伽玛转换的B，R视频信号计算为广播色差信号。 输出单元输出伽马转换后的亮度信号和广播色差信号。

公开(公告)号：KR1020030052451A

公开(公告)日：2003-06-27

申请号：KR1020010082414

申请日：2001-12-21

Applicant: 한국전자통신연구원

Inventor： 김대희 ,  조맹섭 ,  강병호 ,  김진서 ,  김재철 ,  정재영 ,  허태욱 ,  홍상기

IPC: H04N17/00

CPC classification number: H04N17/04 ,  H04N9/646 ,  H04N17/004

Abstract: PURPOSE: A system for selecting an experimental image of a display device and a method thereof are provided to select an experimental image having color areas which the display device is incapable of expressing, thereby affecting on algorithm development and judgement of the picture quality. CONSTITUTION: A display color gamut input unit receives information of RGB to L*a*b*(9*9*9) of a display device in a look-up table form. A display color gamut expanding unit expands RGB to L*a*b of (9*9*9) into RGB to L*a*b of (33*33*33) by using the three-dimensional interpolation. A display color gamut forming unit forms display color areas by forming 30*30*30 cells by dividing RGB to L*a*b of (33*33*33) by 30 equally. An experimental image converter converts an experimental image(RGB) into XYZ values for obtaining color gamut data, L*a*b. An experimental image verifying unit substitutes data of the experimental image for color gamut 30*30*30 cells in order for accumulating data not included in the cells and counting the number. According to the number of the accumulated pixels, the experimental image is selected.

Abstract translation: 目的：提供一种用于选择显示装置的实验图像的系统及其方法，以选择具有显示装置不能表达的颜色区域的实验图像，从而影响图像质量的算法开发和判断。 构成：显示色域输入单元以查询表的形式接收显示装置的RGB到L * a * b *（9 * 9 * 9）的信息。 显示色域扩展单元通过使用三维插值将RGB（L * a * b）（9 * 9 * 9）RGB扩展为（33 * 33 * 33）的L * a * b。 显示色域形成单元通过将RGB分成（33 * 33 * 33）的L * a * b相等30来形成30 * 30 * 30个单元来形成显示颜色区域。 实验图像转换器将实验图像（RGB）转换为XYZ值，以获得色域数据L * a * b。 实验图像验证单元将实验图像的数据替换为色域30 * 30 * 30个单元，以便累积不包括在单元中的数据并对该数量进行计数。 根据累积像素的数量，选择实验图像。

公开(公告)号：KR1020030042611A

公开(公告)日：2003-06-02

申请号：KR1020010073334

申请日：2001-11-23

Applicant: 한국전자통신연구원

Inventor： 홍상기 ,  조맹섭 ,  강병호 ,  김진서 ,  김재철 ,  김대희 ,  정재영 ,  허태욱

IPC: H04N9/77

CPC classification number: H04N17/02 ,  H04N9/64

Abstract: PURPOSE: A system and method for extracting an optimum image using human visual characteristic are provided to extract a picture quality factor, convert and process the extracted factor to reproduce optimum picture quality for a display system. CONSTITUTION: A system for extracting an optimum image using human visual characteristic includes a converter(10) for converting RGB video signals into LCh color spaces, an LCh controller(20) for controlling the value converted from the RGB signals into LCh spaces into an image having optimum colors, and a converter(30) for converting the image into RGB video signals. The system further includes a converter(40) for converting RGB video signals into YPbPr signals, an image control and improving part(50) for controlling the YPbPr signals into an image with high picture quality, and a converter(60) for converting the image into RGB video signals. The system also has a factor extractor(70) for extracting a factor corresponding to the RGB video signals converted by the converter for converting LCh into RGB and extracting a factor corresponding to the RGB video signals converted by the converter for converting YPbPr into RGB.

Abstract translation: 目的：提供一种使用人类视觉特征提取最佳图像的系统和方法，以提取图像质量因子，转换和处理提取的因子以再现显示系统的最佳图像质量。 构成：使用人类视觉特征提取最佳图像的系统包括用于将RGB视频信号转换成LCh色彩空间的转换器（10），用于将从RGB信号转换为LCh空间的值转换为图像的LCh控制器（20） 具有最佳颜色，以及用于将图像转换成RGB视频信号的转换器（30）。 该系统还包括用于将RGB视频信号转换为YPbPr信号的转换器（40），用于将YPbPr信号控制成具有高图像质量的图像的图像控制和改善部分（50），以及用于转换图像的转换器 转换为RGB视频信号。 系统还具有一个因子提取器（70），用于提取与由转换器转换的RGB视频信号相对应的因子，以将LCh转换为RGB，并提取与由转换器转换的RGB视频信号相对应的因子，将YPbPr转换为RGB。

公开(公告)号：KR1020020054236A

公开(公告)日：2002-07-06

申请号：KR1020000083270

申请日：2000-12-27

Applicant: 한국전자통신연구원

Inventor： 김진서 ,  조맹섭 ,  강병호 ,  김홍기 ,  윤창락 ,  한규서

IPC: H04N9/64

Abstract: PURPOSE: A device of transceiving digital broadcasting video signals is provided to add a step of reproducing constant luminance signals during gamma correction, to minimize color information lost during a conversion process, thereby reproducing colors that are not expressed in an existing broadcasting video signal. CONSTITUTION: An input unit inputs video signals. A camera gamma linearizer(301) converts the inputted video signals into linearized R, G, B video signals to remove gamma characteristics of a camera. A luminance signal calculator(302) calculates a luminance signal by using the linearized R, G, B video signals. A gamma converter(303) performs a gamma conversion for the calculated luminance signal and the linearized B, R video signals, by applying the gamma characteristics. A color difference signal calculator(304) calculates the gamma-converted B, R video signals as broadcasting color difference signals. An output unit outputs the gamma-converted luminance signal and the broadcasting color difference signals.

Abstract translation: 目的：提供收发数字广播视频信号的装置，以增加在伽马校正期间再现恒定亮度信号的步骤，以最小化在转换过程中丢失的色彩信息，从而再现现有广播视频信号中未表现的色彩。 构成：输入单元输入视频信号。 相机伽马线性化器（301）将输入的视频信号转换为线性化的R，G，B视频信号以去除相机的伽马特性。 亮度信号计算器（302）通过使用线性化的R，G，B视频信号来计算亮度信号。 伽马转换器（303）通过应用伽马特性来对所计算的亮度信号和线性化的B，R视频信号执行伽马变换。 色差信号计算器（304）将伽马变换的B，R视频信号作为广播色差信号进行计算。 输出单元输出伽马转换的亮度信号和广播色差信号。

公开(公告)号：KR1020020053981A

公开(公告)日：2002-07-06

申请号：KR1020000082258

申请日：2000-12-26

Applicant: 한국전자통신연구원

Inventor： 김홍기 ,  조맹섭 ,  강병호 ,  김진서 ,  윤창락 ,  한규서

IPC: H04N1/60

Abstract: PURPOSE: A method of controlling gamma of a color printer using a monitor is provided to make R, G, B scale images of the monitor and gray/R, G, B sample images of the printer have the same intervals, thereby resolving differences between color images of the monitor and printed color images. CONSTITUTION: A gamma control system displays gray and R, G, B scale images on a monitor(501). The system prints 9-step images of the gray and the R, G, B scale images(502), and compares a printed image with an image displayed on the monitor(503). The system searches two points having the same color in a gray scale of the monitor for the first and the ninth gray patches from a gray scale of the printed image, and clicks the two points(504). The system searches 7 points having the same color in the gray scale of the monitor for the second to the eighth gray patches, and clicks the points(505). The system clicks other points having the same color for the first and the ninth samples from the rest R, G, B scales of the printed image, and searches 7 points having the same color from a color scale of the monitor for the second to the eighth patches of each color, then clicks the 7 points(506). The system obtains 9 monitor scale data per channel for the gray/R, G, B scale images(507).

Abstract translation: 目的：提供使用监视器控制彩色打印机的伽马的方法，使得监视器的R，G，B标度图像和打印机的灰度/ R，G，B样本图像具有相同的间隔，从而解决了 显示器的彩色图像和打印的彩色图像。 构成：伽马控制系统在监视器（501）上显示灰色和R，G，B标度图像。 系统打印灰阶和R，G，B比例图像的9步图像（502），并将打印的图像与显示在显示器上的图像（503）进行比较。 该系统从打印图像的灰度级中搜索第一和第九灰色斑块的监视器灰度相同颜色的两点，并点击两点（504）。 该系统在第二至第八灰色补丁的监视器的灰度级中搜索具有相同颜色的7个点，并点击点（505）。 系统从打印图像的其余R，G，B标度点击第一和第九个样本具有相同颜色的其他点，并从第二个监视器的监视器的颜色标度搜索具有相同颜色的7个点 每个颜色的第八个补丁，然后点击7分（506）。 该系统为灰色/ R，G，B标度图像获得每个通道9个监视器刻度数据（507）。

公开(公告)号：KR1020010076770A

公开(公告)日：2001-08-16

申请号：KR1020000004125

申请日：2000-01-28

Applicant: 한국전자통신연구원

Inventor： 김홍기 ,  조맹섭 ,  강병호 ,  김진서 ,  윤창락 ,  한규서

IPC: G06K15/00

CPC classification number: H04N1/6025 ,  B41J27/08 ,  G06K15/027 ,  H04N1/6058

Abstract: PURPOSE: A method for mapping a monitor RGB to a printer RGB is provided to accord an image color on a monitor with a printed image color by outputting an RGB standard sample image of a color monitor and changing a color value on the monitor by comparing to the output and making a table for an RGB mapping of an RGB of a color monitor and an RGB of a color printer and converting all images into new RGB images based on the table and converting the RGB images into CMYK(cyan, magenta, yellow, black) signals and outputting the signals. CONSTITUTION: In a matching method for a monitor RGB and a printer RGB for according an image on a monitor with a printed image, a standard color sample is printed through a printer. Each color value of the monitor is adjusted for conforming two colors by comparing a standard color sample with the image on the monitor. The adjusting amount of the color value is stored in a reference table. An RGB of an image to be printed is corrected using the reference table and the corrected image is printed.

Abstract translation: 目的：提供一种将监视器RGB映射到打印机RGB的方法，以通过输出彩色监视器的RGB标准样本图像并通过与监视器上的颜色值进行比较来改变监视器上的颜色值，从而将监视器上的图像颜色与印刷图像颜色一致 输出并制作用于彩色监视器的RGB和彩色打印机的RGB的RGB映射的表，并且基于该表将所有图像转换为新的RGB图像，并将RGB图像转换成CMYK（青色，品红色，黄色， 黑色）信号并输出​​信号。 规定：在具有打印图像的监视器上根据图像的显示器RGB和打印机RGB的匹配方法，通过打印机打印标准颜色样本。 通过将标准颜色样本与监视器上的图像进行比较，调整监视器的每个颜色值，使其符合两种颜色。 颜色值的调整量存储在参考表中。 使用参考表校正要打印的图像的RGB，并打印校正的图像。