2) Hausdorf Edge Feature
Shape is also important image content used in
retrieval. The primary mechanisms used for shape
retrieval include identification of features such as edges,
lines, regions and boundaries. Edge features, which
contain information about the shapes of objects, are
frequently used to measure the dissimilarity between
objects. To efficiently represent the character’s shape, we
use a modified Hausdorff distance to calculate the edge
distance. Let Ei be the edge point set of the cartoon
character xi. Given two cartoon characters xi and xj , h( Ei,
Ej) is defined as,