Temporal signal processing with a self-organizing map: an application to Braille recognition task

摘要

An Elman-type feedback SOM is a model which has a feedback loop around the standard SOM's competitive layer, and also has an extra output layer to express quantitative reliability of the applied input signals. In order to investigate its effectiveness, a Braille recognition task is tried with some words containing partially common letters. Because a Braille letter consists of six dots (3×2),it can be seen as spatial/temporal information depending on its width/length direction. As a result, it is found that the model shows good performance appropriately.