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Thomas Pietrzak

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Thomas Pietrzak

Ph.D

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Personal Homepage:
lita.univ-metz.fr/~pietrzak/
Current place of employment:
Telecom ParisTech

Ph.D in computer science.

Research topics:

haptic interactions (tactile and force feedback)
multimodal interactions
tangible interactions (digital pens)

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Publications by Thomas Pietrzak (bibliography)

» 2009 «

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Pietrzak, Thomas, Martin, Benoît and Pecci, Isabelle (2009): Étude et tests d'une application haptique multimodale pour enfants déficients visuels. In Sciences et technologies pour le handicap,

“New technologies allow proposing new interactions, in particular for disabled people. This paper presents the European project MICOLE that aims at providing a development API for multimodal and multi-users applications intended for visually impaired users. In this API, new interactions techniques based on haptic such as tactons and PICOB are introduced. Then, we show an electric circuit schematic exploration software that is built with this API and that uses the PHANToM and the VTPlayer mouse. Finally, we present results of the first experimentation of this application with 13 visually impaired children. ”

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Pietrzak, Thomas, Crossan, Andrew, Brewster, Stephen A., Martin, Benoît and Pecci, Isabelle (2009): Exploring Geometric Shapes with Touch. In: Gross, T. (ed.) Interact 2009 2009, Uppsala, Sweden. pp. 145-148.

“We propose a new technique to help users to explore geometric shapes without vision. This technique is based on a guidance using directional cues with a pin array. This is an alternative to the usual technique that consists of raising the pins corresponding to dark pixels around the cursor. In this paper we compare the exploration of geometric shapes with our new technique in unimanual and bimanual conditions. The users made fewer errors in unimanual condition than in bimanual condition. However they did not explore the shapes more quickly and there was no difference in confidence in their answer.”

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Pietrzak, Thomas, Crossan, Andrew, Brewster, Stephen and Pecci, Isabelle (2009): Creating Usable Pin Array Tactons for Non-Visual Information. In Transactions on Haptics, 2 (2) pp. 61-72

“Spatial information can be difficult to present to a visually impaired computer user. In this paper, we examine a new kind of tactile cuing for nonvisual interaction as a potential solution, building on earlier work on vibrotactile Tactons. However, unlike vibrotactile Tactons, we use a pin array to stimulate the finger tip. Here, we describe how to design static and dynamic Tactons by defining their basic components. We then present user tests examining how easy it is to distinguish between different forms of pin array Tactons demonstrating accurate Tacton sets to represent directions. These experiments demonstrate usable patterns for static, wave, and blinking pin array Tacton sets for guiding a user in one of eight directions. A study is then described that shows the benefits of structuring Tactons to convey information through multiple parameters of the signal. By using multiple independent parameters for a Tacton, this study demonstrates that participants perceive more information through a single Tacton. Two applications using these Tactons are then presented: a maze exploration application and an electric circuit exploration application designed for use by and tested with visually impaired users.”

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Pietrzak, Thomas, Crossan, Andrew, Brewster, Stephen A., Martin, Benoît and Pecci, Isabelle (2009): Exploration de formes géométriques par le toucher. In: 21th French-speaking conference on Human-computer interaction IHM 2009 October 13-16, 2009, Grenoble, France. .

“We propose a new technique to help people to explore geometric shapes without vision. This technique is based on a guidance using directional cues with a pin array. This is an alternative to the usual technique that consists of raising the pins corresponding to dark pixels around the cursor. In this paper we compare the exploration of geometric shapes with our new technique in unimanual and bimanual conditions. According to our results, the users made few errors in both conditions. Moreover the results show an equivalence for both techniques in answer time and users' confidence in their answer.”

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Pietrzak, Thomas, Martin, Benoît and Pecci, Isabelle (2009): Étude et tests d'une application haptique multimodale pour enfants déficients visuels. In Sciences et technologies pour le handicap, 3 (1) pp. 37-62

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» 2007 «

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Pecci, Isabelle and Pietrzak, Thomas (2007): Angle Recognition Cues using a new API dedicated to the VTPlayer Mouse. In: HuMaN March 12-14, 2007, Timimoun, Algerian Sahara. pp. 119-126.

“The VTPlayer mouse is a tactile device that provides two matrices of pins that can be raised or lowered. We aim to use this device to make application more accessible for visually impaired children. To simplify the use of such device in classical applications, we propose a new API (Application Programming Interface) that manages the concept of icon independently of the feedback of the icon. The programmer can easily define icons and propose multimodal feedback (visual, tactile …). In the second part of this paper, we test this API through experiment to recognize angle with tactile icons. The choice of a set of icons suitable for angle discrimination is studied and a possible good one is proposed. User tests are conducted with this set of icons and a statistical study demonstrates its efficiency.”

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Pietrzak, Thomas, Pecci, Isabelle, Saarinen, Rami, Raisamo, Roope and Järvi, Jane (2007): The MICOLE Architecture: Multimodal Support for Inclusion of Visually Impaired Children. In: Ninth International Conference on Multimodal Interfaces ICMI 07 12-15 November, 2007, Nagoya, Japan. pp. 193-200.

“Modern information technology allows us to seek out new ways to support the computer use and communication of disabled people. With the aid of new interaction technologies and techniques visually impaired and sighted users can collaborate, for example, in the classroom situations. The main goal of the MICOLE project was to create a software architecture that makes it easier for the developers to create multimodal multi-user applications. The framework is based on interconnected software agents. The hardware used in this study includes VTPlayer Mouse which has two built-in Braille displays, and several haptic devices such as PHANToM Omni, PHANToM Desktop and PHANToM Premium. We also used the SpaceMouse and various audio setups in the applications. In this paper we present a software architecture, a set of software agents, and an example of using the architecture. The example application shown is an electric circuit application that follows the single-user with many devices scenario. The application uses a PHANToM and a VTPlayer Mouse together with visual and audio feedback to make the electric circuits understandable through touch.”

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Pietrzak, Thomas, Pecci, Isabelle and Martin, Benoît (2007): Un logiciel d'exploration de schémas de circuits électriques basé sur l'API MICOLE. In: 19th French-speaking conference on Human-computer interaction IHM 2007 November 13-15, 2007, Paris, France. pp. 291-294.

» 2006 «

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Pietrzak, Thomas and Pecci, Isabelle (2006): Static and dynamic tactile directional cues experiments with VTPlayer mouse. In: EuroHaptics 2006 July 3-6, 2006, Paris, France. pp. 63-68.

“Braille cells have good potential to provide information. Users don’t have to know the braille alphabet to be able to use them. In this study we show that it is possible to create 4×4 patterns to give the users some directional information. Two kinds of icons have been designed: static patterns and dynamic ones (animations). It appears that users rather like, and recognize better static icons.”

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Pietrzak, Thomas, Noble, Nicolas, Pecci, Isabelle and Martin, Benoît (2006): Evaluation d'un logiciel d'exploration de circuits électriques pour déficients visuel. In: 3èmes Rencontres Jeunes Chercheurs en Interaction Homme-Machine, RJC-IHM 2006. . Available online

» 2005 «

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Pietrzak, Thomas and Pecci, Isabelle (2005): Information display by dragged haptic bumps. In: 2nd International Conference on Enactive Interfaces ENACTIVE 05 November 17-18, 2005, Genoa, Italy. .

“The utility of haptic interfaces is widely established now. Although many interfaces has been designed, few tests about immediate usability have been made. The purpose of this paper is a study of direction and amplitude discrimination when a user feels a bump while moving the hand along an axis with an haptic pointing device. The results show that users can discriminate two and four directions with few errors while using one amplitude. But in the case of two or three amplitudes, some users have difficulties. The amplitude discrimination is more problematic. With only two amplitudes some users don’t manage to discriminate the bumps, and with three amplitudes most of them make a lot of errors.”

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Pietrzak, Thomas, Martin, Benoît and Pecci, Isabelle (2005): Affichage d'informations par des impulsions haptiques. In: Proceedings of the 2005 Conference of the Association Francophone dInteraction Homme-Machine 2005. pp. 223-226. Available online

“Our goal was to find haptic effects that could be used to present information to the user of a haptic pointing device. We present a study on users' ability to discriminate between different effects presented with a PHANToM haptic pointing device. The effects we experimented with were bumps that the user could feel through the PHANToM. The direction and the amplitude of the bumps were manipulated. The results show that the direction is easy to discriminate, but the amplitude is not. Only two levels of amplitude could be reliably discriminated.”

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Publication statistics

Publication period:2005-2009
Publication count:12
Number of co-authors:9

Productive colleagues

Thomas Pietrzak's 3 most productive colleagues in number of publications:

Stephen A. Brewster:80
Roope Raisamo:36
Isabelle Pecci:21

Collaboration count

Number of publications with 3 favourite co-authors:

Isabelle Pecci:12
Benoît Martin:7
Andrew Crossan:3

Other options

Learn more about Thomas Pietrzak:
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Conference Calendar

Mar 22

Workshop on Pervasive healthcare in the home : Supporting patient motivation and engagement

Mar 22

UX People

Mar 22

ETRA '10 - Eye Tracking Research & Applications Symp.

Mar 21

“ Software design is the act of determining the user's experience with a piece of software. It has nothing to do with how the code works inside, or how big or small the code is. The designer's task is to specify completely and unambiguously the user's whole experience. ”

-- David Liddle, From Bringing Design to Software, edited by Terry Winograd, 1996 ”

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Eva Hornecker on Tangible Interaction

Eva Hornecker explains the evolving concept of Tangible Interaction.

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Thomas Pietrzak

Ph.D

Publications by Thomas Pietrzak (bibliography)

» 2009 «

» 2007 «

» 2006 «

» 2005 «

What do YOU think?

Changes to this page (author)

Publication statistics

Productive colleagues

Collaboration count

Other options

Conference Calendar

Eva Hornecker on Tangible Interaction

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