%
% The Lanczos2D and Robidoux filters are tuned for cylindrical
% (radial) EWA (Elliptical Weighted Average) distortion. Lanczos2D
-% is a 2-lobed Lanczos-like filter using Jinc (for EWA) or Sinc.
+% is a 2 lobe Lanczos-like filter using Jinc (for EWA) or Sinc.
% Robidoux used to be a sharpened version of Lanczos2D (with
-% blur=0.958033808). Now, it is a Cubic 'Keys' filter tuned so that
-% images with only vertical or horizontal features are exactly
-% preserved when performing 'no-op" with EWA distortion. Robidoux
-% turns out to be close to both plain Mitchell and "sharpened"
+% blur=0.958033808). Now, it is the unique Cubic 'Keys' filter that
+% exactly preserves images with only vertical or horizontal features
+% when performing 'no-op" with EWA distortion. It turns out to be
+% close to both plain Mitchell (slightly more blurry) and "sharpened"
% Lanczos2D.
%
% Special 'expert' options can be used to override any and all filter