公开(公告)号：KR1020030031673A

公开(公告)日：2003-04-23

申请号：KR1020010063418

申请日：2001-10-15

Applicant: 삼성전자주식회사

Inventor： 김영선 ,  조봉환 ,  강봉순 ,  홍두일

IPC: H04N9/73

CPC classification number: H04N9/73 ,  G06T11/001

Abstract: PURPOSE: An apparatus and a method for converting a color temperature are provided to convert a video depending on a user's request by detecting the color temperature within the wider range. CONSTITUTION: An XYZ converting part(401) converts RGB signals of input video data into X,Y, and Z values of a CIE coordinate system. A chrominance calculating part(405) calculates X and Y coordinates. An offset correcting part(407) corrects the X coordinate based on a difference in X coordinate and a difference in Y coordinate between a color temperature placed on a white point line of the CIE coordinate system and an actual color temperature of the video data in the case of calculating the color temperature based on the X coordinate. A color temperature calculating part(409) calculates the color temperature of the video data inputted based on the corrected X coordinate. A color temperature converting part(420) converts the color temperature into a predetermined color temperature.

Abstract translation: 目的：提供用于转换色温的装置和方法，以通过检测较宽范围内的色温来根据用户的要求转换视频。 构成：XYZ转换部分（401）将输入视频数据的RGB信号转换成CIE坐标系的X，Y和Z值。 色度计算部（405）计算X和Y坐标。 偏移校正部（407）基于X坐标的差异和位于CIE坐标系的白点线上的色温与在CIE坐标系的白点线的实际色温之间的Y坐标的差异来校正X坐标 基于X坐标计算色温的情况。 色温计算部（409）基于经校正的X坐标来计算输入的视频数据的色温。 色温转换部分（420）将色温转换成预定色温。

公开(公告)号：KR100441595B1

公开(公告)日：2004-07-23

申请号：KR1020010063418

申请日：2001-10-15

Applicant: 삼성전자주식회사

Inventor： 김영선 ,  조봉환 ,  강봉순 ,  홍두일

IPC: H04N9/73

CPC classification number: H04N9/73 ,  G06T11/001

Abstract: A color temperature conversion system and a method thereof are capable of converting the color temperature to the color temperature almost identical with the color temperature obtained by the Robertson algorithm. The color temperature conversion system has an XYZ conversion unit for converting an RGB signal of input video data into an XYZ value in a CIE coordinate system, a chroma calculating unit for calculating X and Y coordinate values of a pixel corresponding to the converted XYZ value, an offset compensate unit for compensating the X coordinate value calculated by the chroma calculating unit based on an X coordinate value difference and a Y coordinate value difference of a color temperature on a white point line of the CIE coordinate system and an actual color temperature of the video data, in the case the color temperature is calculated based on the calculated X coordinate value, a color temperature calculating unit for calculating the color temperature of the video data that is inputted based on the compensated X coordinate value, and a color temperature conversion unit for converting the color temperature calculated by the color temperature calculating unit into a predetermined color temperature and outputting the converted predetermined color temperature.

Abstract translation: 色温转换系统及其方法能够将色温转换成与由Robertson算法获得的色温几乎相同的色温。 色温转换系统具有：XYZ转换单元，用于将输入视频数据的RGB信号转换成CIE坐标系中的XYZ值;色度计算单元，用于计算与转换后的XYZ值相对应的像素的X和Y坐标值; 偏移补偿单元，用于基于所述CIE坐标系的白点线上的色温的X坐标值差和Y坐标值差以及所述CIE坐标系的实际色温来补偿由所述色度计算单元计算的所述X坐标值 视频数据，在基于计算的X坐标值计算色温的情况下，用于计算基于补偿的X坐标值输入的视频数据的色温的色温计算单元以及色温转换单元 用于将由色温计算单元计算的色温转换成预定颜色te 并输出转换后的预定色温。