Recognition method for 2D polygonal objects in ultrasound images

A 2D polygons recognition method is proposed. First, a polygonal vertex detection is applied and the two strongest guesses are retained. Then a polygonal fitting algorithm using as input the two vertices and the object contour provides a precise object identification and description. A software environment was designed to test and use the proposed method, and to evaluate its speed and accuracy. The procedure was applied to detect objects in side-scan sonar images.