Intestinal contractions are one of the most important events to diagnose motility pathologies
of the small intestine. When visualized by wireless capsule endoscopy (WCE), the sequence
of frames that represents a contraction is characterized by a clear wrinkle structure in the
central frames that corresponds to the folding of the intestinal wall. In this paper, we present
a new method to robustly detect wrinkle frames in full WCE videos by using a new mid-level
image descriptor that is based on a centrality measure proposed for graphs. We present an …