Separate Color Node
![Separate Color Node.](../../../_images/node-types_FunctionNodeSeparateColor.png)
The Separate Color Node splits an image into its composite color channels. The node can output multiple Color Models depending on the Mode property.
Inputs
- Image
Standard image input.
Properties
- Mode
The color model to output.
- RGB:
Split the input image into it's three outputs: Red, Green, and Blue color channels.
- HSV:
Split the input image into it's three outputs: Hue, Saturation, and Value color channels.
- HSL:
Split the input image into it's three outputs: Hue, Saturation, and Lightness color channels.
- YCbCrA:
Split the input image into it's three outputs: Luminance, Chrominance Blue, and Chrominance Red color channels.
- Color Space
ITU 601, ITU 709, JPEG
- YUV:
Split the input image into it's three outputs: Luminance, U chrominance, and V chrominance color channels.
Outputs
The outputs of this node depends on the Mode property (see above).
- Alpha
The color channel that is responsible for the image's transparency.
Examples
Blur Alpha
![../../../_images/compositing_types_converter_combine-separate_example-combine-rgba.png](../../../_images/compositing_types_converter_combine-separate_example-combine-rgba.png)
An example of blurring the alpha channel.
In this first example, we take the Alpha channel and blur it, and then combine it back with the colors. When placed in a scene, the edges of it will blend in, instead of having a hard edge. This is almost like Anti-Aliasing but in a three-dimensional sense. Use this node setup, when adding CG elements to live action to remove any hard edges. Animating this effect on a broader scale will make the object appear to "phase" in and out, as an "out-of-phase" time-traveling sync effect.
Increase Luminance
![../../../_images/compositing_types_converter_math_multiply.png](../../../_images/compositing_types_converter_math_multiply.png)
An example of the scaling the Luminance channel.
This example has a Math (Multiply) node increasing the luminance channel (Y) of the image to make it brighter.
نصيحة
If running these channels through a Color Ramp node to adjust value, use the Cardinal scale for accurate representation. Using the Exponential scale on the luminance channel gives a high-contrast effect.