Silhouette Maps for Improved Texture Magnification

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We can embed the information we need into the silhouette map by adding two boolean flags in each cell. One boolean will tell us whether the western edge has a boundary and the other will do the same for the northern boundary.

In this example, the west edge is a "true" because we have an edge there and the north edge is a "false" because there is no edge there.

We can determine the status of the other two edges by looking at the neighboring cells...

As presented at SIGGRAPH/EUROGRAPHICS Graphics Hardware 2004
by Pradeep Sen on August 30, 2004