Category Archive: PhD

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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Feb
11

Microsoft Surface 2 as Image Source for EmguCV

The Surface's raw image ready to be processed with Emgu CV

Microsoft’s new Surface (i.e., the Samsung SUR40 device) features PixelSense which offers an image similar to that of a camera-based interactive surface (some example captures). The Surface driver already does quite a bit of processing (e.g., finger and orientation recognition or tag detection). Still, there are many more possible applications using the raw image data. To …

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Feb
11

Samsung’s SUR40 for Microsoft Surface

Samsung SUR40 for Microsoft Surface

This week we received two brand new devices, namely two shiny Samsung SUR40 multi-touch interactive surfaces (i.e., Microsoft’s new Surface, or Surface 2). In my opinion, their main advantage is not size or display resolution (there are bigger surfaces out there), but lies in their sensing technology PixelSense. In a nutshell, every pixel also acts …

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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

Multi-touch Table

Interiors of table

This multi-touch table I built as a research platform is based on a diffused illumination approach: 91x57cm surface (107cm diagonal, 16:10 aspect ratio) Toshiba TDP‐EW25 projector (1280x800px) Point Grey Firefly MV camera (640x480px, 60fps) with wide-angle lense Infrared illumination (850nm) Bosch Rexroth aluminium frame UPDATE I: I am now using a diffused surface illumination (DSI) …

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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

FTIR Compliant Surface Tutorial

Silicone applied to drafting film

Inspired by a post on NUI Group Community Forums by Tinkerman I decided to give FTIR (to be accurate, a combination of DSI and FTIR.) a try, creating my first owncompliant surface. The described technique of applying a layer of silicone to a projection surface seemed to be much easier than other methods, such as pouring silicone …

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Nov
16

PhoneTouch

PhoneTouch Logo

PhoneTouch is a novel technique for integration of mobile phones and interactive surfaces. The technique enables use of phones to select targets on the surface by direct touch, facilitating for instance pick&drop-style transfer of objects between phone and surface. The technique is based on separate detection of phone touch events by the surface, which determines …

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