The curve below (and a zoomedin version) show where the equalerror rate
is, i.e., the crossing point between the cumulative distributions of wrongly
accepting (Pdiff) and wrongly rejecting (Psame) a pair of documents as coming from the
same writer. The curves intersect at an EER of 3% for this implementation of the
hinge, which was convolutional, over edges in the image, using 31 bins and
legs of 7 pixels. Of the full 31x31 anglecombination matrix, a subset of
387 angle combinations is reached with legs of this size and are sensible
(some redundant combinations are left out). Results are on the Firemaker
data set (250 writers, 2 paragraphs/writer).

