1. A symbol, comprising: an array of modules having a first shape arranged in an overall geometric pattern; a finder pattern that has a shape that is different from the first shape; and a plurality of position detection patterns having shapes that are different from the first shape, wherein the finder pattern and the position detector patterns have geometric shapes susceptible to probabilistic detection, wherein the probabilistic detection identifies a pattern by correlating boundary points of the pattern with a selected geometric shape of the pattern, wherein the boundary points are detected on a set of angularly displaced scan lines, each scan line intersecting the other scan lines at a starting point within an image of the symbol, and wherein the configuration of the finder pattern and plurality of position detection patterns facilitate determination of position, size and inclination of an image of the symbol.