Figure 8From: Sparse identification of contrast gain control in the fruit fly photoreceptor and amacrine cell layerExample of identification of the spatio-temporal DNP given in Example 3. (a)–(c) Identification of the first-order filters (a) \(h_{1}^{1}\), (b) \(h_{1}^{2}\), and (c) \(h_{1}^{i4}\), \(i=1,2,3,4\). (d) Identification of the second-order filters (from top to bottom) \(h_{2}^{ij4}\) with \(i \leq j\) for \(i=1,2,3,4\) and \(j=1,2,3,4\)Back to article page