| 103D3 |
|---|
| A Braille Recognition Task with an Elman-type Feedback SOM Preserving Past History |
| AUTHORS |
| Hiroyuki Harada, Hiroshi Wakuya, Katsunori Shida (Saga University) |
| ABSTRACT |
| An Elman-type feedback SOM is a model which has a feedback loop for preserving past history around the standard SOM¡Çs 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 four kinds of words containing partially common letters. Generally speaking, a Braille is a character for a visually- handicapped person. Because each of these letters consists of six dots (3x2), it can be seen as spatial/temporal information depending on its width/length direction. The basic concept of the neuro-bar model, one of the interpretations of the recognition process of time series regarding as a firing propagation along with the ¡Èway¡É from the initial to the certain goal driven by the external input signal, is referred for analyzing the proposed model¡Çs behavior. As a result, it is found experimentally that the model shows good performance against the well-known training data. Furthermore, some untraining data presenting deferent speed and containing some declination are dealt with appropriately. |
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Annual Conference 2002