Figure 5
From: A Method of Drusen Measurement Based on the Geometry of Fundus Reflectance
Bar graphs: results of semi-automated vs. stereographic manual measurements. Bar graph (A) compares the measured percentage of drusen in the middle subfield obtained by two different methods. The semi-automated method uses computer-assisted interactive macular background leveling followed by a global threshold, and the manual grading estimates drusen areas from the original photographs viewed as stereo pairs (the gold standard). The means and standard deviations of independent computer-assisted measurements by two observers are displayed. The standard deviations, as shown on each bar, represent the reproducibility of the computer-assisted method. Bar graph (B) shows a similar comparison in the central subfield. Bar graph (C) displays the absolute differences between the automated measurements and the manual measurements in the central and middle subfields.