Fig. 4
From: An automatic system for recognizing fly courtship patterns via an image processing method
The steps of torso shape matching for head, thorax, and abdomen detection. A The process for a headed test and a headless test with two frames for each test is demonstrated. The different colors in step 5 denote the head, thorax, and abdomen. The female fly had a severed head in the headless test, while the female fly retained its head in the headed test. B The Dice similarity coefficient result of the comparison