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    • 9. 发明授权
    • Color gradation correction system of combination of looking-up table and
interpolation and method thereof
    • 查找表和插值的组合的色彩校正系统及其方法
    • US5479272A
    • 1995-12-26
    • US106486
    • 1993-08-13
    • Takehiko Saito
    • Takehiko Saito
    • H04N1/60G03F3/08H04N1/46
    • H04N1/6019
    • A color correction system and method for correcting three kinds of color gradation input data, each having an m bit length, to produce three kinds of corrected color gradation data, each having an m bits length, by a combination of looking-up in a look-up table to find the closest color gradation corrected data and carrying out an interpolation to obtain improved color reproducibility. The system includes a first memory for storing previously calculated color gradation corrected data defined by a combination of upper n bits color gradation data (m>n); a second memory for storing previously obtained coordinate correction data defined by a combination of lower (m-n) bits color gradation data, and outputting first to third coordinate correction data; an adding unit for adding the upper n bits data of the first to third color gradation input data and the first to third coordinate correction data and outputting same to the first memory as a memory address thereof, to cause an output of the stored color gradation corrected data defined by the memory address; and an average calculating unit receiving the color gradation corrected data from the first memory and calculating averages of the three kinds of color gradation corrected data.
    • 一种用于校正每种具有m位长度的三种颜色灰度输入数据的颜色校正系统和方法,以通过查找的组合来产生每种具有m位长度的三种校正色等级数据 的表格,以找到最接近的色彩校正数据并进行插值以获得改进的颜色再现性。 该系统包括:第一存储器,用于存储由高n位颜色灰度数据(m> n)的组合定义的先前计算的色彩校正数据; 第二存储器,用于存储先前获得的由下(m-n)位彩色灰度数据的组合定义的坐标校正数据,并输出第一至第三坐标校正数据; 添加单元,用于将第一至第三颜色灰度输入数据和第一至第三坐标校正数据的上n位数据相加,并将其作为其存储器地址输出到第一存储器,以使所存储的颜色灰度的输出被校正 由存储器地址定义的数据; 以及平均计算单元,从第一存储器接收色彩校正数据,并计算三种颜色灰度校正数据的平均值。