色彩校正

This section describes settings for color correction of the scene.本节介绍场景色彩校正的设置。

Scene Color Settings场景颜色设置

Brightness	Correction of the overall scene brightness: Positive values lighten the colors up to white.Positive values lighten the colors up to white. Negative values darken the colors up to black.Negative values darken the colors up to black. Positive values lighten the colors up to white.Negative values darken the colors up to black.校正整体场景亮度： Positive values lighten the colors up to white.正值将颜色变亮为白色。 Negative values darken the colors up to black.负值将颜色变深为黑色。
Contrast	Correction of the overall scene contrast: Positive values increase the contrast.Positive values increase the contrast. Negative values decrease the contrast.Negative values decrease the contrast. Positive values increase the contrast.Negative values decrease the contrast.校正整体场景对比度： Positive values increase the contrast.正值会增加对比度。 Negative values decrease the contrast.负值会降低对比度。
Gamma	Correction of the overall scene gamma.校正整个场景的伽玛。
White	White level of the scene.场景的白平衡。
LUT Texture	The loading, viewing, or clearing of the Lookup Table texture for color transformation.加载，查看或清除查找表纹理以进行颜色转换。
Color Correction	Tonal range and tone response of the final image. The horizontal input color values are mapped to the vertical output values based on curves for Red, Green and Blue channels. By adjusting all three channels at once, you control the luminance of the final image. Color correction curvesColor correction curves Color correction curves最终图像的色调范围和色调响应。水平输入颜色值根据红色，绿色和蓝色通道的曲线映射到垂直输出值。通过一次调整所有三个通道，您可以控制最终图像的亮度。 Color correction curves色彩校正曲线
Preserve Saturation	Preserve initial scene color saturation after applying color correction.应用色彩校正后，保留初始场景色彩饱和度。
Saturation Correction	Correction curve of the overall scene saturation. The input luminance values are mapped to the vertical saturation values: The higher the value, the more saturated and vibrant the colors are.The higher the value, the more saturated and vibrant the colors are. The lower the value, the duller and more colorless the colors are.The lower the value, the duller and more colorless the colors are. Saturation curveSaturation curve Control the saturation of shadows by adjusting the values on the left, highlights - on the right. The higher the value, the more saturated and vibrant the colors are.The lower the value, the duller and more colorless the colors are.Saturation curve校正整个场景饱和度的曲线。输入的亮度值映射到垂直饱和度值： The higher the value, the more saturated and vibrant the colors are.值 越高，颜色越饱和和鲜艳。 The lower the value, the duller and more colorless the colors are.值较低，颜色更暗，更无色。 Saturation curve饱和度曲线 通过调整左侧的值（高光-右侧）来控制阴影的饱和度。
Saturation Group	Saturation fine-adjustment for 12 major colors of the spectre. Saturation adjustmentSaturation adjustment Saturation adjustment光谱的12种主要颜色的饱和度微调。 Saturation adjustment饱和度调整
Hue Group	Hue (color shift) fine-adjustment for 12 major colors of the spectre. Hue adjustmentHue adjustment Hue adjustment色相的12种主要颜色的色相（色彩偏移）微调。 Hue adjustment色相调整

Color Correction LUT (Lookup Texture) is an optimized way of performing color grading in a post effect. Instead of tweaking individual color grading parameters, only a single texture is used to produce the corrected image. The lookup is performed by using the original image color as a vector to address the lookup texture.Color Correction LUT（查找纹理）是在后期效果中执行颜色分级的一种优化方法。无需调整单个的颜色分级参数，仅使用单个纹理即可生成校正后的图像。通过使用原始图像颜色作为矢量来处理查找纹理来执行查找。

One of the most common applications of lookup tables is to use them to see how images look in different media, such as TV/video or film, which have different color capabilities. Using a lookup table designed to mimic a certain display medium gives a much better idea what your current work will look like after it’s transferred to that medium.查找表最常见的应用之一是使用它们来查看图像在具有不同色彩功能的不同媒体（例如电视/视频或电影）中的外观。使用旨在模仿某种显示媒体的查找表，您可以更好地了解当前工作转移到该显示媒体后的样子。

Advantages of using a Color correction LUT include:使用色彩校正LUT的优点包括：

• Better performance — realtime computation is replaced by a simple array indexing operation.更好的性能-实时计算被简单的数组索引操作所取代。
• More professional workflow opportunities, where all color transforms can be defined using professional image editing software (such as Photoshop or GIMP), which provides a more precise result.更多专业工作流程机会，可以使用专业图像编辑软件（例如Photoshop或GIMP）定义所有颜色转换，从而提供更精确的结果。

Simple scene with neutral color correction applied.应用了中性色彩校正的简单场景。

Same scene using the lookup texture with shadows, highlights and vibrance applied.使用具有阴影，高光和鲜艳度的查找纹理的同一场景。

注意

Various visual effects can be created by changing the color correction LUT dynamically in realtime.通过实时动态更改色彩校正LUT，可以创建各种视觉效果。

Lookup Texture Requirements查找纹理要求#

The 2D texture representation must be laid out in a way that it represents an unwrapped volume texture (as an image sequence of "depth slices").2D纹理表示必须以表示展开的体积纹理的方式进行布局（作为“深度切片”的图像序列）。

A 1024 x 32 texture, representing a 32x32x32 color LUT. 1024 x 32 纹理，代表 32x32x32 颜色LUT。

Workflow Example工作流程示例#