Figure 3
From: Fully automatic evaluation of the corneal endothelium from in vivo confocal microscopy
Relation between cell shape, characteristic frequency, and cell density. Synthetic, band-limited images (350×350 pixels) of (a) square and (c) hexagonal cell pattern with 25 pixel side-to-side length for each cell. (b, d) Magnitude of the central region of the respective frequency spectra. Characteristic frequencies are \(\frac {14}{350}=\frac {1}{25}\textit {px}^{-1}\) and \(\frac {16}{350}\approx \frac {2}{\sqrt {3}}\frac {1}{25}\textit {px}^{-1}\), respectively.