Abstract

Introduction The user interface of a hand-held device cannot be directly adopted from normal-sized computers. Naturally, all the output has to be presentable with a small display of lower resolution. However, the traditional input methods cannot be just scaled down. A miniature keyboard is not convenient to use if the keys are smaller than nger tips and they are placed too near to each other. One solution to the problem is to use a pen for both text input and pointing purposes. Keys can be selected more precisely with a sharp pen than with a nger. A more sophisticated solution is to equip the device with a handwriting recognizer and write the desired text with the pen. Our work concentrates on such input methods for isolated Latin characters. The main problem in recognition of handwriting is the vast number of personal writing styles. Even if a recognizer is trained with data from several writers and therefore accepts various writing styles, it will certainly perform poorly w

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