更改脚本的查找表(LUT)
脚本的查找表是控制文件或设备颜色空间和Nuke的内部色彩空间。在曲线编辑器中,x轴表示输入像素值,y轴表示输出像素值(归一化为0-1范围)。当应用LUT时, Nuke沿x轴查找输入值,以确定要输出的y值。
Nuke提供许多nuke-default LUT,包括: linear, sRGB , rec709 , Cineon1 The Cineon conversion is implemented as defined in Kodak’s Cineon documentation., Gamma1.8, Gamma2.2, Panalog2 The Panalog LUT is based on a log2lin conversion with a blackpoint of 64, whitepoint of 681, and a gamma of 0.89. , REDLog3 The REDLog LUT is based on a log2lin conversion with a blackpoint of 0, whitepoint of 1023, and a gamma of 1.022.,ViperLog4 The ViperLog LUT is based on a log2lin conversion with a blackpoint of 0, whitepoint of 1023, and a gamma of 1.0., AlexaV3LogC5 The Alexa LogC LUT uses the formula provided by ARRI., PLogLin6 The PLogLin LUT uses the default values for the formula, mapping log 0.43457 (code value 445 on a 1024 scale) to linear 0.18 (mid-gray) assuming a negative gamma of 0.6 and a density per code value of 0.002. (This does factor in the fact that value ranges for a log image in Nuke are still scaled to 0-1 range.), SLog7 The Sony S-Log LUT comes from the Sony S-Log Whitepaper Version 1.110. For more information, see http://www.sony.co.uk/res/attachment/file/66/1237476953066.pdf. , 和 REDSpace8 The REDSpace LUT is implemented as defined in a curve provided by RED..
您还可以创建无限数量的其他LUT,并在脚本设置中编辑或删除现有LUT。
默认情况下, Nuke对某些文件类型或设备使用某些LUT。在大多数情况下,您无需触摸这些默认值。但是,有时可能需要更改默认值:例如,如果您的材料是使用在自定义色彩空间中记录的相机(例如Panalog)拍摄的。在这种情况下,您可以更改脚本设置中的默认设置,从而无需更改每个“读取”或“写入”节点上的颜色空间。
如果不想使用默认的LUT来读取或写入某些单个图像,则可以选择要在相应的“读取”或“写入”节点的控件中使用的LUT。
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