<p>The cut-off parameter. Above this value the function is zero.</p>

<p>Piecewise, smooth function that increases linearly with negative arguments.
$$    f(x) = \left\{
       \begin{array}{ll}
         -(x - x_0/2) &amp; x &lt; 0 \\
         \frac{1}{2x_0}(x - x_0)^2 &amp; 0 &lt; x &lt;x_0 \\
         0 &amp; x \ge x_0
         \end{array} \right.
$$</p>

Reconstructs retinae by morphing a flat surface with cuts (a
dissected flat-mount retina) onto a curvilinear surface (the standard retinal
shape). It can estimate the position of a point on the intact adult retina
to within 8 degrees of arc (3.6% of nasotemporal axis). The coordinates in
reconstructed retinae can be transformed to visuotopic coordinates.

David Sterratt

retistruct

Retinal Reconstruction Program

f: Piecewise smooth function used in area penalty

Description

Usage

Arguments

Value