Closed Contour Specular Reflection Segmentation in Laparoscopic Images

Figure 2

Overview of the hybrid closed contour thresholding algorithm. Three different process lines are used for the detection and are combined in a final segmentation. The contour-based segmentation is capable of segmenting even tiny specular reflections which cannot be detected by a single threshold. Furthermore, the closed contour supports reflections of Type 2, which have been detected by thresholding with a precise boundary. Reflections of Type 1 are large specular reflections with a smooth gradient and a bright central part.