A temporal hierarchical feedforward model explains both the time and the accuracy of object recognition
| Autor: | Sajjad Zabbah, Reza Ebrahimpour, Hamed Heidari-Gorji |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Computer science Science Stimulus (physiology) Article 03 medical and health sciences 0302 clinical medicine Representation (mathematics) Spiking neural network Multidisciplinary business.industry Cognitive neuroscience of visual object recognition Feed forward Pattern recognition Cognitive neuroscience 030104 developmental biology Computational neuroscience Medicine Spike (software development) Noise (video) Artificial intelligence Visual system business 030217 neurology & neurosurgery |
| Zdroj: | Scientific Reports Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021) |
| ISSN: | 2045-2322 |
| Popis: | Brain can recognize different objects as ones it has previously experienced. The recognition accuracy and its processing time depend on different stimulus properties such as the viewing conditions, the noise levels, etc. Recognition accuracy can be explained well by different models. However, most models paid no attention to the processing time, and the ones which do, are not biologically plausible. By modifying a hierarchical spiking neural network (spiking HMAX), the input stimulus is represented temporally within the spike trains. Then, by coupling the modified spiking HMAX model, with an accumulation-to-bound decision-making model, the generated spikes are accumulated over time. The input category is determined as soon as the firing rates of accumulators reaches a threshold (decision bound). The proposed object recognition model accounts for both recognition time and accuracy. Results show that not only does the model follow human accuracy in a psychophysical task better than the well-known non-temporal models, but also it predicts human response time in each choice. Results provide enough evidence that the temporal representation of features is informative, since it can improve the accuracy of a biologically plausible decision maker over time. In addition, the decision bound is able to adjust the speed-accuracy trade-off in different object recognition tasks. |
| Databáze: | OpenAIRE |
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