voicepen_ - VoicePen: Augmenting Pen Input with...

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VoicePen: Augmenting Pen Input with Simultaneous Non-Linguisitic Vocalization Susumu Harada, T. Scott Saponas, James A. Landay Computer Science and Engineering University of Washington Seattle, WA 98195 USA {harada, ssaponas, landay}@cs.washington.edu ABSTRACT This paper explores using non-linguistic vocalization as an additional modality to augment digital pen input on a tablet computer. We investigated this through a set of novel interaction techniques and a feasibility study. Typically, digital pen users control one or two parameters using stylus position and sometimes pen pressure. However, in many scenarios the user can benefit from the ability to continuously vary additional parameters. Non-linguistic vocalizations, such as vowel sounds, variation of pitch, or control of loudness have the potential to provide fluid continuous input concurrently with pen interaction. We present a set of interaction techniques that leverage the combination of voice and pen input when performing both creative drawing and object manipulation tasks. Our feasibility evaluation suggests that with little training people can use non- linguistic vocalization to productively augment digital pen interaction. Categories and Subject Descriptors H.5.2 [ Information interfaces and presentation ]: User Interfaces – Voice I/O. General Terms Design, Human Factors. Keywords Voice-based interface, pen-based interface, multimodal input. 1. INTRODUCTION Pen-based input on tablet computers is used for a wide variety of applications such as note taking, sketching, architectural design [9], graphic design, website design, and animation. Typically, users manipulate a pen on the tablet’s surface by controlling pen position, whether the pen is touching the surface, and the state of the pen’s barrel button(s). This allows users to draw brush strokes, click buttons, and operate menus. However, many tasks can benefit from simultaneous continuous manipulation of multiple parameters. For example, in drawing applications, one may want to change brush thickness and opacity at the same time (Figure 1), or change the color of the brush while stroking (see Figure 2 for examples of other brush parameters that may be continuously manipulated). This is in contrast to discrete manipulation such as picking a different brush type or color. When creating two-dimensional animations, the user may wish to specify moving elements that not only change their location but also their orientation or scale simultaneously. On a typical tablet, users have at their disposal the pen’s pressure on the tablet surface to control one of these extra parameters. However, this only allows the control of one extra parameter, and pen pressure may not be the ideal control for many of these parameters.
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voicepen_ - VoicePen: Augmenting Pen Input with...

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