Phase Segmentation Methods for an Automatic Surgical Workflow Analysis

Figure 4

Example outputs of all steps in the GridIntersect method.

(a) Grid of vertical and horizontal (red) lines

(b) Intersection points of the grid, shown as blue points

(c) Extracted OFs at intersection points, shown as yellow lines

(d) Noise removed from the OFs, shown as yellow lines

(e) Quantized OFs, shown as yellow lines