p144fig04.22 Computer simulation of how simple and complex cells respond to the end of a line (gray region) that is thin enough relative to the receptive field size (thick dashed region in the left panel).   These cells cannot detect the line end, as indicated by the lack of responses there in the left panel (oriented short lines denote the cells' preferred positions and orientations, and their lengths denote relative cell activations). Such an end gap is corrected in the responses of hypercomplex cells that create a boundary at the line end which is called an end cut (right panel).  See the text for details.<BR>|| End gap and end cut simulation (Grossberg, Mingolia 1985).  End gap, filter size, end cut.