Presentation Information
[11a-PB5-12]Font Dependence in Classification of Optical Characters Directly Irradiated to a Physical Reservoir
〇Koki Masuda1, Tsuyoshi Hasegawa1 (1.Waseda Univ.)
Keywords:
Physical reservoir,Reservoir computing
We investigated font dependence in optical character classification using a physical reservoir based on a Cu-doped tantalum oxide thin film. Alphabet patterns in Gothic, Century, and cursive fonts were directly irradiated onto the reservoir using a DLP projector, while a sinusoidal voltage was applied and output waveforms were measured from seven electrodes. Classification was performed for each font and for mixed-font conditions, where identical letters were treated as the same label regardless of font. The accuracy decreased from single-font classification to mixed-font classification, and t-SNE visualization showed that the reservoir output distribution varied depending on font. These results indicate that differences in optical irradiation patterns caused by font shape affect the reservoir outputs and classification performance.