Color Estimation
Description
Color Estimation is designed to extend or expand edge pixels around a matte. It helps fill semi-transparent edges with appropriate color information, reducing dark halos or premultiplication artifacts when compositing keyed or roto elements.
The node works by expanding the edge region and propagating color outward using color extension, distortion and warp techniques derived from the alpha edge. This allows compositors to maintain clean edges even with motion blur, soft mattes, or aggressive grading. 
Node Group
Composite.
Controls
Mode
Extend
Extends the color when edge pixels become transparent.
Distort
Expands edge colors outward using distortion.
Warp
Warps edge pixels outwards.
Smooth
Softens the alpha edge before the expansion is generated.
Shrink
Shrinks the alpha before edge expansion.
Distort
Expands edge colors outward using distortion.
Size
Sets the scale of the distortion.
Amount
Controls the strength of the distortion. Higher values add variation and help break up uniform edges.
Warp
Warps edge pixels outwards.
Size
Sets the spatial scale of the warp field. Larger values influence a wider area.
Amount
Controls the strength of the warp. Higher values push color farther from the edge.
Rotate
Rotates the warp direction. Useful when expansion needs directional bias.
Blur
Smooths the warp field. Higher values produce softer, more organic expansion, while lower values preserve sharper detail.