In this paper, we present a study of how instructors draw diagrams in the process of delivering lectures. We are motivated by wanting to understand challenges and opportunities for automatically analyzing diagrams, and to use this to improve tools to support the delivery of presentations and the viewing of archived lectures. The study was conducted by analyzing a large group of examples of diag...

In this paper, we develop an interactive haptic system, which can be further aid for digital Chinese painting. When an artist is holding our force feedback device, one feels like holding a real painting brush with all the contact and bending forces, since the viscosity, friction, and the bending force of a brush touching the paper are simulated. First we derive a physical dynamics model as bend...

We present a framework for pen-based, multi-user, online collaboration in mathematical domains. This environment provides participants, who may be in the same room or across the planet, with a shared whiteboard and voice channel. The digital ink stream is transmitted as InkML, allowing special recognizers for different content types, such as mathematics and diagrams. Sessions may be recorded an...

Molecules are inherently three-dimensional objects that are represented by chemists on paper and classroom blackboards by a system of two-dimensional notations. A major hurdle for aspiring chemists in college courses is to be able to visualize the actual 3D structure from the dimensionally-deficient 2D drawings. ChemPad, a new Tablet PC application with a pedagogical focus was designed and impl...

The purpose of this study was to investigate the effect of the reactive dye structure and type of penetrant in ink formulation on paper ink-jet printing. Different type of papers, which have same grammage was printed upon with three commercial reactive dyes, CI Reactive Blue 49 Ink 1, 4, CI Reactive Blue 21 Ink 2, Ink 5 and CI Reactive Blue 19 Ink 3, Ink 6, which are based on different reactive...

The objective of this paper is to present a variety of aspects relating to digital print: light-fastness of inks, the relationship of ink on paper and alternative methods of presenting print, and research on print in a digital format. The paper refers to an exhibition Digital Print, Traditional Print, which was presented at the recent Computers and Art and Design Education conference (CADE) in ...

This paper describes a technique for automatically creating an index for handwritten notes captured as digital ink. No text recognition is performed. Rather, a dictionary of possible index terms is built by clustering groups of ink strokes corresponding roughly to words. Terms whose distribution varies significantly across note pages are selected for the index. An index page containing the inde...

In this paper we present a novel digital pen device, called data-embedding pen, for enhancing the value of handwriting on physical paper. This pen produces an additional ink-dot sequence along a written stroke during writing. This ink-dot sequence represents arbitrary information, such as writer’s name and writing date. Since the information is placed on the paper as an ink-dot sequence, it can...

The low accuracy rates of text–shape dividers for digital ink diagrams are hindering their use in real world applications. While recognition of handwriting is well advanced and there have been many recognition approaches proposed for hand drawn sketches, there has been less attention on the division of text and drawing ink. Feature based recognition is a common approach for text–shape division....

It is reasonable to believe that the hand movements performed to write words are different from the types of movements performed to draw symbols. Inspired by the models that describe handwriting as a system of coupled oscillations, we believe that the different behaviours, corresponding to text, symbols, or others, present distinguished frequential patterns. Therefore, we propose a descriptor c...