Information Technology Reference
In-Depth Information
The toolkit is developed in Java. We have used it in our own projects and have
experienced that it is very stable. However, it is not under active development any
more. While older pen models (Logitech io2, Maxell DP-201, Nokia SU-1B and
SU-27W) are supported, more recent pen models cannot be used with the toolkit
unless extra code is written to access these pens.
iPaper
The iPaper framework [134] was developed by Beat Signer and his colleagues at
ETH Zurich. It supports the development of interactive paper products by combin-
ing an authoring perspective with a service approach. The underlying concept is
to decouple visual design, interaction design and development of the services. The
graphic designer authors the document. A service developer implements a service
that can be used with an interactive paper document. Finally, the interaction designer
ties both the document and the services together by defining links between regions
of the paper document and services.
iPaper is based on iServer, a generic framework that allows the definition of links
between arbitary physical or digital information entities. For instance, links can
be defined between any combination of images, videos, digital documents, paper
sheets, RFID tags and many other types of resources. Each link can have multiple
source and multiple target resources. The iPaper plug-in for iServer provides more
specific support for Pen-and-Paper Interfaces. iPaper links are established between
an active region on paper and an active component, which is the service associated
with this region. In contrast to the Anoto SDK, active regions do not have to be
rectangular. Other shapes, such as circles and polygons are supported. When the
pen is used on an active region, the framework automatically executes the code of
the active component that is linked to this region. While a number of predefined ac-
tive components are available, the application developer can easily add own active
components.
iPaper has a distributed architecture. For instance, an active component can be
deployed on a server. Moreover, it includes a powerful printing component. This
component allows printing documents that contain the Anoto pattern directly from
within the end application, similar to the Anoto Paper SDK. It supports most of
the current pen models (including Anoto ADP 201, Logitech io2), but not the most
recent Anoto ADP-301.
Letras
Letras [36] is an open source toolkit that provides support for mobile Pen-and-Paper
Interfaces in ubiquitous computing settings. Letras enables to use the same pen in
a variety of different contexts, in combination with various computing devices. Per-
haps most interesting is that it allows users to couple Anoto pens with Android
phones and tablets. This provides for using interactive Pen-and-Paper Applications
