Learning of somatosensory representations for texture discrimination using a temporal coherence principle
Autor(en): | Hipp, J Einhauser, W Conradt, J Konig, P |
Stichwörter: | 1ST-ORDER VIBRISSA AFFERENTS; Computer Science; Computer Science, Artificial Intelligence; DECISION-MAKING; Engineering; Engineering, Electrical & Electronic; FREQUENCY; INVARIANT OBJECT RECOGNITION; NEURAL CODES; NEURONS; Neurosciences; Neurosciences & Neurology; RATS; SLOW FEATURE ANALYSIS; somatosensory; temporal coherence; vibrissal; VISUAL-SYSTEM; whisker; WHISKER VIBRATION | Erscheinungsdatum: | 2005 | Herausgeber: | TAYLOR & FRANCIS INC | Journal: | NETWORK-COMPUTATION IN NEURAL SYSTEMS | Volumen: | 16 | Ausgabe: | 2-3 | Startseite: | 223 | Seitenende: | 238 | Zusammenfassung: | In order to perform appropriate actions, animals need to quickly and reliably classify their sensory input. How can representations suitable for classification be acquired from statistical properties of the animal's natural environment? Akin to behavioural studies in rats, we investigate this question using texture discrimination by the vibrissae system as a model. To account for the rat's active sensing behaviour, we record whisker movements in a hardware model. Based on these signals, we determine the response of primary neurons, modelled as spatio-temporal filters. Using their output, we train a second layer of neurons to optimise a temporal coherence objective function. The performance in classifying textures using a single cell strongly correlates with the cell's temporal coherence; hence output cells outperform primary cells. Using a simple, unsupervised classifier, the performance on the output cell population is same as if using a sophisticated supervised classifier on the primary cells. Our results demonstrate that the optimisation of temporal coherence yields a representation that facilitates subsequent classification by selectively conveying relevant information. |
Beschreibung: | Gordon Research Conference on Sensory Coding in the Natural Environment, Queen Coll, Oxford, ENGLAND, SEP 05-10, 2004 |
ISSN: | 0954898X | DOI: | 10.1080/09548980500361582 |
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geprüft am 03.05.2024