Figure 2From: Digital image analysis of endoscopic ultrasonography is helpful in diagnosing gastric mesenchymal tumors Extraction process of the anechoic center and outer hyperechoic rim of the EUS scope. (a) Gray image. (b) Smoothing method. (c) Edge-linking method. (d) Binarization. (e) Labeling with Grassfire algorithm. (f) Removal of noise using morphologic information. (g) Extraction of anechoic center of the scope. (h) Extraction of outer hyperechoic rim of the scope.Back to article page