Sameer -

<p>For the features, I just got that they were a poor man's (or efficient man's) analogue of the edge-sensitive cells in the visual cortex. Instead of having a wide variety of angles, they only have two. It looks like they have features for vertical (a) and horizontal (b) edges, plus thin vertical stripes (c). I'm not quite sure about (d), since it looks like it picks up horizontal stripes or stippling.

<p>Or maybe I'm missing your question.

<p>/s