Clean Plates For Superior Chroma Keying In Resolve Fusion

December 11, 2024

Learn to use Fusion’s DeltaKeyer and CleanPlate tools - and how to replicate them in other tools - and improve final chroma keying results.


Series

Chroma Keying Part 7: Mastering the art of clean plate creation

Learn how to use uneven chroma-keying backgrounds by creating clean plates. You will either use Delta Keyer’s built-in Pre Matte tab or connect a clean plate using the external CleanPlate tool.

For your advanced technical understanding, this Insight demonstrates how to manually perform a background correction that works with any keying tool.

Why do we need to create clean plates?

Even the most professional green screen setups typically display some unevenness in lighting or minor color inconsistencies. Shadows cast from the actor onto the screen are sometimes unavoidable.

A clean plate is essential in those scenarios to address the uneven lighting, particularly around the edges of your subject. Using the clean plate, the keyer performs an initial screen correction to account for the unevenness of the background while maintaining all edge detail. In the second step, the key is computed based on an ideal background.

This process results in a cleaner, more precise key with better edge detail.

The Fusion Delta Keyer can perform this process within the single DeltaKeyer node via the Pre Matte tab. Here, you first select a hard key that separates the subject from the background. That hard key is then used for an internal screen correction.

Alternatively you can connect an external clean plate to the Delta Keyer. Fusion’s CleanPlate tool offers a simple approach to constructing a clean plate from your footage.

Sometimes, you may use a filmed or manually constructed clean plate.


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