p157fig04.34 Some textures that were simulated with mixed success by the complex channels model.  In particular, the model gets the wrong answer for the textures in (g) and (i).  The Boundary Contour System model of <A HREF="http://www.BillHowell.ca/ProjMini/TrNNs_ART/images- Grossberg 2021/p153fig04.32 Double filter and grouping network.png">Figure 4.32</a>, which includes both a double filter and a bipole grouping network, simulates the observed results.