Fig. 5
From: An automatic system for recognizing fly courtship patterns via an image processing method
The solution to identify orientation and tapping behavior. A The definition of the orientation. B A flow chart of tapping detection. Six conditional steps are used to judge tapping behavior. C–P Demonstration of processing in each step. C Binarization of the body. D Binarization of the torso. E Leg-only skeletonization; the minimum branch length L of the skeletonization is set to 5 (L = 5). F Body with leg skeleton, the combination of (E) and the torso. G The erosion result of (F). H Completed skeleton, the skeletonization of the body (L = infinity). I The subtraction of the complete skeleton from leg-only skeletonization. J Torso and wings area, morphology processing result of (I). K Leg branch, the subtraction of the torso and wings area from the body with leg-skeleton. L Branched torso, the combination of the leg branch and torso. M Denoising result for a branched torso. N The multiplication of the binarization of the body and the raw image. O Double thresholding result of (N). P The binarizing and denoising results for the cyan area in (O)