A toolkit for the dynamic study of air sacs in siamang and other elastic circular structures
Fig 4
Example of our Hough Transform approach.
Examples: Hough Transform tool applied to a video of a siamang (see here) and a green tree frog (Hyla cinerea; see sample here), with satisfactory performance for some purposes such as position tracking or large-scale changes in inflation (but after investigation of tracking performances we favor DLC+). The left image contains a photo by Wim Pouw and Mounia Kehy. The picture on the right is from the youtube video and analyzed by us for testing.