Fig. 5.

Representation of the ILM surface. The red line segment shows the height of the ILM (320 voxels in this case) at the ${350}^{\text{th}}$ A-scan of the ${40}^{\text{th}}$ B-scan. Therefore in the 2D array representation of the ILM surface, the value at location $\left(350,40\right)$ is 320. For a $496\times 1024\times 49$ OCT volume, since there are 1024 × 49 A-scans, the 2D array for the ILM surface is of size 1024 × 49. In total nine 1024 × 49 2D arrays are needed to fully represent all nine boundaries.