彩色输出设备特征化的三维查找表方法研究.pdfVIP

彩色输出设备特征化的三维查找表方法 徐艳芳，武兵，黄敏，金扬 (北京印刷学院，北京102600) 摘要：设备的特征化是色彩管理的关键。本文给出了一种构建常用数字影像硬拷贝输出设备特征化三 维查找表的方法。在RGB数字空间中均匀采样。并进行数据的虚拟扩充；经四面体线性插值技术，建立了 由cIE三龆柏堙0RGB变换的特征化三维查找表。对3种类型6个不同设备的实验表明，四面体线性插值技 术同样适于采样数据的虚拟扩充；由扩充后的采样数据得到的33×33×33尺寸的三维查找表，转换色差 较使用未扩充的采样数据得到的17×17×17尺寸的查找表有了明显降低。在其中一个输出设备上对实际 影像进行了应用，变换后的影像色彩得到了有效校正。 关键词：特征化；三维查找表：四面体线性插值；虚拟扩充；色差 中图分类号?TS853+，5：TS801．3 Methodfor Color Devices 3D_LUT CharacterizingOutput XU Min，JIN Yah-fang,WUBing,HUANGYang Institute (Beijing ofGraphicCommunication，Beijing102600) Abstract：Devicecharacterizationisthe ofcolor is for the key management．Atechniqueproposedestablishing three。，dimensional for used Look··Up-Table(3DLUT)usedcharacterizingcommonlydigitalimagehardcopy an the is inRGB with further datasetois devices．Samplingperformedspace equalstep，and sampling virtually a 3D_LUT CIEL*a+b’toRGBisobtainedtetrahedrallinear enlarged．Theconverting by interpolation． on6 werecarriedout devicesofthreedifference results thatthetetrahedrallinear Experiments types．Theproved also tO the with33X on was suited 3D_LUT 33×33size，basedadded interpolation addingsamplingpoints，and data．had error 3DLLIT fromthe sampling thesmallerthan17×17×17 resulting originalsamplingdata．Finally, was toacolor ona colorswere the3D_LUT device．The corrected applied image output preferably．