Fig. 16

Comparison of the low-rank functional identification with STC. (A) SNR of identified quadrature pairs of Gabor filters in a complex cell, as a function of number of spikes used in identification. Low-rank functional identification reaches nearly machine precision with about 746 spikes, which corresponds to about 70 stimulus trials (see also Figure 14). STC reaches about 17 [dB] SNR with \({\sim}30\text{,}000\) spikes. (B) Quadrature pair Gabor filters (1st column) identified with low-rank functional identification algorithm with 746 spikes (2nd column, SNR: 128.48 [dB], 130.84 [dB]), and with STC using 39,769 spikes (3rd column, SNR: 16.79 [dB], 17.88 [dB]) and using 746 spikes (4th column, SNR: 0.20 [dB], 0.60 [dB])