Figure 6
![Figure 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13408-020-0080-5/MediaObjects/13408_2020_80_Fig6_HTML.png)
Identified filters of the DNP model of the photoreceptor given in Example 2. (a) \(\widehat{\mathcal{P}h^{1}_{1}}\), (b) \(\widehat{\mathcal{P}h^{2}_{1}}\), (c) \(\widehat{\mathcal{P}h^{1}_{2}}\), (d) \(\widehat{\mathcal{P}h^{2}_{2}}\)
Identified filters of the DNP model of the photoreceptor given in Example 2. (a) \(\widehat{\mathcal{P}h^{1}_{1}}\), (b) \(\widehat{\mathcal{P}h^{2}_{1}}\), (c) \(\widehat{\mathcal{P}h^{1}_{2}}\), (d) \(\widehat{\mathcal{P}h^{2}_{2}}\)