Kinect remove Background

General TouchDesigner Discussion
1

Hi Folks,

I just got kinect V2 and I saw great works using kinect to remove background.

How can I remove the background without Chroma?

best regards

2

Use the depth information from blue channel of the color point cloud to threshold the pixels. Note that those depth values go above a pixel value of 1!

3

Hi pinkwerks

Could you give me an exemple of the process you did to cutout the user…

I connected to RGBKey threshold…but it did not work.

Tks

4

if you’re removing the background behind people you can use the “player index” stream from the Kinect TOP as a mask. It provides isolated player silhouettes in shades of grey over transparent black. Presumably you can use the shades of grey to select specific players to mask, but I usually run the whole thing through a Level TOP to max players all out to white before plugging into a Matte TOP.

5

Sorry for the late response, just got my kinect now

I never used Matte TOP. Could you explain me the process

As input3 I am using player index of kinect, it will draw the sillhoute what about the other 2 inputs, how can I connect in order to remove the background

best Regard

6

Hi guys

Can you help me with Matte top On this situation?( using the silhoute of kinect On Matte top to remove the background?)

Tks

7

One of your inputs to the Matte TOP should be whatever you want your background to be, say a Constant TOP set to black or green. Then the other inputs are your Kinect feed and finally your Player Index goes into the 3rd input to pull the player out of your Kinect feed and composite it with the solid color.

8

Hi Touchdesigner community (first post)!

I have yet to understand the Matte TOP, but I found an alternate solution. For my purposes I wanted to eliminate the background completely. Since I couldn’t find a solution anywhere in the forums, I thought I’d share my solution.

With the kinect TOP set to depth and unknown value = 0, I adjusted the level TOP parameters to fit my needs: invert = 1, brightness = 2, and black level = 0.83. The increased black level in the background allows the composite TOP to completely remove the background when the operation is set to “inside luminance”.