Figure 3
From: A Method of Drusen Measurement Based on the Geometry of Fundus Reflectance
Drusen segmentation in central and middle subfields. The background-leveled drusen image from Fig 2 is shown in higher magnification. Drusen are identified by single threshold operations, respectively, in the central subfield (A), middle annular subfield (B), and combined regions (C), with the bit-mapped version (D) of segmentation (C) shown as being suitable for quantitative morphometric analysis.