Real haptic interfaces

03 Dec

Haptic means that the holographic image created is tactile, that is, one can touch it and feel that it actually gives the feeling that by touching it we are touching an object.

The work was published at a traditional computer graphics conference in its Asian version, Siggraph Asia, in 2014.

The device uses ultrasound devices, similar to microphones, but smaller to create points in space, forming an ultrasonic body according to the projected image, and the pressure of the hands at that point meets resistance giving the sensation that something is touched.

By synchronizing the ultrasound points with the figure, various 3D holographic objects will be possible, one of them is exemplified by researcher Ben Long, assistant in the project.

Long explains: “In the future, people could touch holograms of non-palpable objects, identifying for example the differences between materials analyzed in a computed tomography or artifact forms of a museum.”

Rendering forms in the English experiment can be smooth (only points are tactile), non-regularized (different tactile points), and regularized (tactile points with some texture).

The following video shows how to touch the hologram with explanations of the experiment:


Long, S. A. Seah, T. Carter and S. Subramanian, (2014) Rendering Volumetric Haptic Shapes in Mid-Air Using Ultrasound, Volume 33, Issue #7 of ACM Transactions on Graphics (Siggraph Asia).



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