Spill Correction

Spill Correction Menu

Green Screen - Single Mask

Green screen spill correction - single mask

Green Screen - Dual Mask

Green screen spill correction - dual mask

Blue Screen

Blue screen spill correction

1 – Spill Correction Opacity: This is the overall strength of the spill correction. This rarely needs adjust by very much. If the spill correction in the entire image needs adjusted then this is what you want to adjust. However, if the spill correction only needs adjusted for a certain color (yellow shirt for example) then the spill color range is what you will want to adjust.

2 – Spill Color Range: Important Concept to Understand – Spill color range is the range of color that are targeted for spill correction. This is different than the spill correction opacity. Spill color range sets the color thresholds where the spill correction starts to take effect.

For green screen, there are 2 adjustments, spill color range warms and spill color range cools. The spill color range warms affects how far the spill correction extends into the yellow spectrum. The spill color range cools affects how far the spill correction extends towards the yellow spectrum

When green screen spill mixes with your image, it doesn’t just turn areas green. It actually creates a gradient of colors in the foreground. For example, if a green screen with a hue of 120 mixes with hair that has a hue of 30, the spill creates a band of colors in the hair that range from 30-120. This entire band of colors needs shifted back to normal. This color range passes through the yellow spectrum and into the green spectrum. The spill color range is what defines where in this color range that the spill correction should start.

Watch the videos below which explains this in detail.

Spill Color Range Diagram

The diagram below helps explain what the spill color range setting does. The actual software algorithm for the spill color range is more complex than this diagram. The software algorithm is also effected by saturation and brightness values. However, this basic diagram shows in a simple form what adjusting the spill color range does.

Spill Color Range Diagram

By | 2017-01-15T01:46:44+00:00 March 26th, 2016|EZ Green Screen Tutorials|1 Comment

About the Author:

Damon is the owner of Pixnub Software and the developer of the Pixnub plugins. He has 18 prior years in engineering working for Intel and Micron Technology. In 2009, Damon decided to combine his photography and engineer skills to start Pixnub and EZ Green Screen.