How do I extract a color from part of an image and use in keying?

I want to pull out a rect from the corner, like 10x10 to 100x100 and feed it into the key color of the keying node. This is so I can auto detect if its a green screen or blue screen input.

enter image description here

  • $\begingroup$ Just plug the crop output into the Key Color put of the keyer. $\endgroup$ – 3pointedit Dec 19 '16 at 5:35
  • $\begingroup$ @3pointedit I tried that, doesn't work $\endgroup$ – Petah Dec 19 '16 at 6:39
  • $\begingroup$ Perhaps you could add a "scale to scene" dimensions node after the crop? Shouldn't require this however. $\endgroup$ – 3pointedit Dec 23 '16 at 11:44

You just needed to scale that to the image size



Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.