Apparatus and method for providing a weighted average of time varying characteristic of handwriting

摘要

The stress wave activity produced during a first generation of a piece of handwriting in an enrollment procedure is put into a store and the stress wave activities produced for subsequent generations of the piece of handwriting in the enrollment procedure are used sequentially to produce a weighted average of the stored stress wave activity and the stress wave activity of the subsequent generation of the piece of handwriting and replaces the stored stress wave activity; the weighted average includes a weighted average of amplitudes and times of events. For subsequent generations of the piece of the handwriting are resequenced in order of increasing difference from the respective stored stress wave activity. The subsequent generations of the piece of handwriting are again used to sequentially produce weighted averages and replace the stored stress wave activity. The subsequent generations of the piece of handwriting are again resequenced in order of increasing difference from the respective stored stress wave activity. Each of the four subsequent generations of the piece of handwriting are used to produce weighted averages and replace the stored stress wave activity if the difference from the respective stored stress wave activity is less than a predetermined value.