Figure 4
From: Automatic segmentation of deep intracerebral electrodes in computed tomography scans
An example of the head point computation of the Electrode Axis Estimation step. (a) in a region R the algorithm looks for a point, C 0, with an intensity value greater than the threshold. If such point does not exist the region size is increased, R ′, until the point is found. In (b) the algorithm compute the center of mass of a region R centered in C 0. This step is iterated, C k , until the point C k is equivalent to C k−1. In (c) the point C k will be used as head point point (H) in later analysis steps.