Tag Archive: research

Feb
11

Kickables: Tangibles for Feet

This example of a museum exhibit on basic molecules allows visitors to interact by kicking physical objects around—which we call kickables. (a) This visitor starts a tutorial video by pushing a kickable from pause to play. (b) Another visitor scrubs through a different video. (c) This visitor assembles a water molecule by moving a red hydrogen atom towards a blue oxygen atom.

Great Affordance for Large Interactive Spaces Kickables are tangibles that users manipulate with their feet. While they maintain the affordance of traditional tangibles, kickables scale to arbitrarily large spaces as kickables reside on the ground. This affordance makes kickables well-suited for large-scale walk-up installations, such as tradeshows or museum exhibits, as illustrated by our prototype installation …

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Feb
04

Personal Clipboards

Subarea Clipboards (HandsDown)

Personal Clipboards for Individual Copy-and-Paste on Shared Multi-User Surfaces The copy-and-paste functionalities provided by clipboards are omnipresent on today’s computing devices from desktops to tablets to mobile phones. Despite this success, clipboards did not make their way to multi-user surfaces until now, because most surface computing devices cannot distinguish input from different users. To them, …

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Jan
25

GravitySpace

We use a mirror-metaphor to show how GravitySpace identifies users and tracks their location and poses

A New Approach to Tracking People and Objects Based on a Pressure-Sensing Floor GravitySpace is a new approach to tracking people and objects indoors. Unlike traditional solutions based on cameras, GravitySpace reconstructs scene data from a pressure-sensing floor. While the floor is limited to sensing objects in direct contact with the ground, GravitySpace reconstructs contents above …

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Jul
19

PICOntrol

Handheld projector, projected interface consisting of on and off buttons, and target devices (lamps)

In everyday environments, we are increasingly surrounded by a growing number of electric devices. At the same time, many of these devices are shrinking in physical size. Both developments come along with their own challenges when it comes to controlling these devices. On the one hand, a plethora of devices imply that not all of …

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Nov
18

IdWristbands for User Identification on Multi-touch Surfaces

Prototype of IdWristband

IdWristbands are designed to enable user identification for camera-based multi-touch surfaces. In this approach, users wear wristbands equipped with infrared LEDs, to provide touches with identities. The LEDs transmit coded light pulses as an identifier. We are using a specific blinking pattern to determine the orientation of the wristband in order to reliably associate corresponding …

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Nov
18

HandsDown and IdLenses

Unregistered and registered user

Biometric User Identification for Multi-touch Surfaces Based on Hand Contours HandsDown is a novel technique for user identification on interactive surfaces. It enables users to access personal data on a shared surface, to associate objects with their identity, and to fluidly customize appearance, content, or functionality of the user interface. To identify, users put down their hand flat on the …

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Nov
17

Conducting a Virtual Orchestra

3- and 4-beat conducting gestures

In the context of my Diploma thesis I developed new means of input for an existent system allowing users with any skill to conduct a virtual orchestra in realtime. The eWatch, a wearable computing and sensing platform, was selected as input device. It is worn like a regular wrist watch and transmits acceleration data via …

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Nov
17

Indirect Multi-touch Interaction

Most current multi-touch devices use direct input, especially larger surfaces. In this context, we asked how much the advantages of multi-touch depend on the directness of input. An indirect multi-touch device has several potential advantages, such as interaction from a distance (remote control), different control-display ratios (allowing for larger screens), more ergonomic settings (looking straight …

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Nov
17

Multiuser-aware Surface Computing

Hand contour extraction steps

The above video shows a working prototype which allows users to identify by simply putting down their hands on the surface. This is related to a topic I became recently more and more interested in: the topic of multiuser-awareness, or user identification respectively discrimination, for interactive surfaces. Of course, there is DiamondTouch which can distinguish …

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Nov
16

Touchlib Gradient Filter

Resulting map

Background Touchlib is a open-source “library for creating multi-touch interaction surfaces” based on computer vision. It uses a filter chain to process the incoming camera image and detect blobs corresponding to fingers on the surface. Motivation Currently, Touchlib applies a filter to every single pixel of an image with the same intensity. For example, if …

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