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IBKColor

The IBK keyer differs from many other keyers in that, instead of using a single color picker, it uses an input image (a clean plate with just the color variations of the background) to drive the key. This generally gives you good results when working with uneven blue- or greenscreens.

The IBK keyer consists of two nodes: IBKColor and IBKGizmo. IBKColor creates the clean plate from the blue- or greenscreen image, and IBKGizmo pulls the key.

NOTE:  Pre-rendering output from IBKColor to some formats can result in loss of color information and incorrect results when the image is used as input to IBKGizmo. We recommended that the .exr format is used for pre-rendered images as it supports full float data, reducing loss of information.

As a general workflow guide:

1.   Connect the output from IBKColor to the c input of IBKGizmo.
2.   Attach the input of IBKColor, along with the fg input of IBKGizmo, to the original blue- or greenscreen image.
3.   Attach the bg input of IBKGizmo to your background image.
4.   Create two Viewers and view the output from both nodes side-by-side.
5.   Adjust the controls of IBKColor until you get a clean plate with nothing but the background colors.
6.   Adjust the controls of IBKGizmo until you are happy with the key.
7.   Connect the output from IBKGizmo to a compositing node, such as Merge, to composite the foreground over the background.

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