3. The method of claim 1 , comprising: determining a first distance between the first space and the second space; determining a second distance between the first space and the third space; and determining a third distance between the second space and the third space, wherein determining the two dimensional geometric shape comprises determining the two dimensional geometric shape using the first distance, the second distance, and the third distance.
3. The method of claim 1 , comprising: determining a first distance between the first space and the second space; determining a second distance between the first space and the third space; and determining a third distance between the second space and the third space, wherein determining the two dimensional geometric shape comprises determining the two dimensional geometric shape using the first distance, the second distance, and the third distance. 5. The method of claim 3 , wherein the two dimensional geometric shape comprises a word centroid and the document signature indicates a signature location of the centroid in the image.