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Image difference white or black

Hi all,

i’m working on a dance interactive project

i’m trying to do ,i think, a simple thing, i want to have the image difference between movement and the fixed background.

I’ve tried with trauner, backgroundsuppression and backgroundsubtraction but all these give me not a white or black uniform color on the difference but i have always the presence to reveal a negative background behind.

There is any method to have a uniform color for the presence without the information of the take reference frame?

Thanks
n1ente

hi giorgio!

see -bg+key.fx at user shaders and tell best regards to massimo if you meet him!

cheers