层级节点

层级节点。

The Levels Node read the input color channels and outputs analytical values. The output is one-dimensional meaning the visualization will be a uniform gray color.

输入

图像

Standard color input.

属性

通道

Selects which color values are used to calculate analytics.

• 合成结果

  Calculate values based on the red, green, and blue channels.

  Red

  Calculate values based on the red channel.

  绿色

  Calculate values based on the green channel.

  Blue

  Calculate values based on the blue channel.

  亮度

  Calculate values based on the Luminance of the image.

输出

平均值

The mean is the average value of all image pixels in specified channel. It represents the overall brightness of the image and can be used as such for setups that depend on how “bright” or “dark” the input is.

标准差

表明图像像素值偏离平均值的程度。低标准差数值表明了图像像素和平均值比较接近，高标准差数值表明了偏离平均值较大的数值范围。