Translating physical texture into vibration

Hi everyone,

I am working on an art school project, and I am very new to TouchDesigner.

I am trying to translate frottage textures(physical surface rubbings) into a tactile experience using vibration.

The idea is not to “sonify” the image but to simulate what it feels like to move your hand across the surface.

I have already connected my laptop to an amplifier and two exciters, which would create the vibration.

What I am currently struggling with is extracting this information from the image and balancing smooth vs rough textures.

I would really appreciate it if someone can give me any ideas to approach that or has done any similar projects for reference.

I’ve attached my work file!

Thanks a lot!

Image to Sound(Vibration)_v4.7.toe (11.4 KB)