wannabeafrog

I'm fairly new to jitter and I'm trying to process a real time video input of people with a chromakey. The idea is to apply diverse effects only to the people in the screen, leaving the background clean. I think I've figured how to deal with most of the operations except for the binary threshold. I need a threshold to transform the 4plane matrix into single plane, I know jit.chromakey does this internally but I believe I need access to these processes.

I already tried jit.rgb2luma and cv.jit.threshold, but the resulting picture looks like this: 

http://s30.postimg.org/uf8ol4f7h/Screen_shot_2015_06_18_at_11_02_17_PM.png

http://s13.postimg.org/g33ogjhqr/Screen_shot_2015_06_18_at_11_59_35_PM.png

Below, instead of a full patch (I've been testing and I use a lot of subpatchers), I copied a commented schema of what I intend to do. I would appreciate if anyone could help me finding a way to achieve my goal (unless I'm wrong, I think I only need the Threshold):

I already tried jit.rgb2luma and cv.jit.threshold, but the resulting picture looks like this: http://s30.postimg.org/uf8ol4f7h/Screen_shot_2015_06_18_at_11_02_17_PM.png
and I need this:
http://s13.postimg.org/g33ogjhqr/Screen_shot_2015_06_18_at_11_59_35_PM.png

binary-threshold-question

check out cv.jit.floodfill used in conjunction with cv.jit.dilate and cv.jit.erode. you can chain several dilate objects together for greater effect.

Binary threshold question