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Come to our #SIGGRAPH2026 talk today: Our method turns existing 3D objects into multi-touch sensors, without modifying the interior. From a scan, we sample surface-intrinsic curves that conform to mutual-cap layouts, and optimize their intersections for coverage & fabrication.

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Christian Holz

2,586 subscribers

53,043 Aufrufe • vor 3 Monaten •via X (Twitter)

Wissenschaft & TechnologieBildung#SIGGRAPH2026
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19 Kommentare

Profilbild von Christian Holz
Christian Holzvor 3 Monaten

Our method formulates sensor design as constrained curve routing on a 3D mesh. We generate two layers of surface-intrinsic Tx/Rx curves. Through integer optimization, we select a fabrication-ready subset with uniform coverage under sensing, hardware, and geometry constraints.

Profilbild von Christian Holz
Christian Holzvor 3 Monaten

For fabrication, we unfold the 3D curves into 2D traces, vinyl-cut them from thin Kapton-copper laminate, and use projection guidance for attachment. Our fabricated bunny, mouse, bowl, and spoon achieve mean touch errors of just 0.65-1.6 mm and strong SNR.

Profilbild von Christian Holz
Christian Holzvor 3 Monaten

Andela Ilic, J. Gao, Z. Li, Y. Jiang, R. Schuchert, M. Meier, P. Herholz, C. Holz. Retrofitting Existing 3D Objects with Surface-Conforming Capacitive Sensing. ACM SIGGRAPH 2026. project: arXiv:

Profilbild von LF0
LF0vor 3 Monaten

Fun! 1000 great ideas possible with that

Profilbild von Pathetic Brook
Pathetic Brookvor 3 Monaten

This is cool as hell.

Profilbild von Furkan+
Furkan+vor 3 Monaten

Wow so cool

Profilbild von EsotericHustler
EsotericHustlervor 3 Monaten

this is so cyberpunk (endearing) i can't even.

Profilbild von amy
amyvor 3 Monaten

So cool

Profilbild von sanjay prasad hs
sanjay prasad hsvor 3 Monaten

Oh wow! Can this also detect pressure and other things, not just touch? , But it also probably senses temperature and pressure as well. Then you could probably put this on a lot of stuff for VR and AR tech, right?

Profilbild von Christian Holz
Christian Holzvor 3 Monaten

It also detects pressure right now in the form of increased coupling, but more as an artifact due to our fabrication not by design. It's a clear direction for future work though, exactly for input control in AR/MR.

Profilbild von MrManderly
MrManderlyvor 3 Monaten

Very cool. The bunny deserves to have ear rubs too though.

Profilbild von Christian Holz
Christian Holzvor 3 Monaten

challenging for surface routing due to bottleneck in geometry but working on this for v2

Profilbild von Mohamed Sami Zeghdar
Mohamed Sami Zeghdarvor 3 Monaten

Amazing concept, it can add new dimensions to input devices. Have you thought about bringing space mouse capabilities to standard ones via touch?

Profilbild von Frankenbyte
Frankenbytevor 3 Monaten

Using the projection for sensor print placement is pretty innovative. Nice.

Profilbild von Christian Holz
Christian Holzvor 3 Monaten

Only way we found to make sure the physical sensor precisely works the way the optimized design generated, though there's got to be easier ways to get that part done in the future...

Profilbild von Makr3D
Makr3Dvor 3 Monaten

Sampling conductive layouts along the existing surface is a clever way to keep the object geometry intact. The fabrication question is especially interesting: how tolerant is the method of rougher FDM surfaces and layer texture compared with a smooth scanned part?

Profilbild von Jake↑↑↑
Jake↑↑↑vor 3 Monaten

@lushptr we need the inverse of this for robotic sensing

Profilbild von Christian Holz
Christian Holzvor 3 Monaten

@lushptr Yes! That's the reason we've developed this... as a labeling technique for hand-object contact and force.

Profilbild von Jake↑↑↑
Jake↑↑↑vor 3 Monaten

@lushptr oh wow, youre going to do very well

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