An Evaluation of 3D-Chain Coding for Transmission of Handwritten Text

Abstract

In this paper we present an evaluation of using 3D-Chain Codes as representation of handwritten text for transmission over data networks. The original telewriting specification included only x and y coordinates of the handwritten text to be coded using zone codes or chain codes. Most of the actual pen based input devices can sense not only x and y coordinates, they can also sense pressure. It is important to preserve the pressure data, not only because it represents a distinguishable characteristic of the writer, but also because this parameter had shown to be useful in handwritten recognition applications. Based on the variables x, y and pressure, we construct a modified 3D-chain code to reduce the size of the data and the number of messages to be transmitted.