Chroma Keyer

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David Robinson
David Robinson 2011-1-29
Hi All
I am roughing out the code for a basic keyer which will eventually go into Nuke. At the moment I have separated an image into the three channels. What I now want to do is to place the data into a 3d scatter plot before I can go further.
When I try to do this I am getting an error saying that the vector lengths are not the same.
here are the three variables containing the RGB data.
r 389x512 1593344 double
g 389x512 1593344 double
b 389x512 1593344 double
All values within are normalised between 0 and 1.
As you can see they are equal in size, but no joy with scatter3.
Any help with this would be ultra cool.
Thank you in advance
David
  1 个评论
Oleg Komarov
Oleg Komarov 2011-1-29
Can you post the code you use to call scatter3?

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采纳的回答

Andrew Newell
Andrew Newell 2011-1-29
The inputs to scatter3 need to be vectors, not matrices. Try this:
scatter3(r(:),g(:),b(:))

更多回答（1 个）

David Robinson
David Robinson 2011-1-29
Hi Andrew
Thats brilliant. Thank you very much.
on with the task
David

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