Fast readout of object identity from macaque inferior temporal cortex

CP Hung, G Kreiman, T Poggio, JJ DiCarlo - Science, 2005 - science.org
Science, 2005science.org
Understanding the brain computations leading to object recognition requires quantitative
characterization of the information represented in inferior temporal (IT) cortex. We used a
biologically plausible, classifier-based readout technique to investigate the neural coding of
selectivity and invariance at the IT population level. The activity of small neuronal
populations (∼ 100 randomly selected cells) over very short time intervals (as small as 12.5
milliseconds) contained unexpectedly accurate and robust information about both object …
Understanding the brain computations leading to object recognition requires quantitative characterization of the information represented in inferior temporal (IT) cortex. We used a biologically plausible, classifier-based readout technique to investigate the neural coding of selectivity and invariance at the IT population level. The activity of small neuronal populations (∼100 randomly selected cells) over very short time intervals (as small as 12.5 milliseconds) contained unexpectedly accurate and robust information about both object “identity” and “category.” This information generalized over a range of object positions and scales, even for novel objects. Coarse information about position and scale could also be read out from the same population.
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