FisheyeHemi is a set of Photoshop plug-in filters which provides
correction for hemispheric fisheye lens distortion. Fisheye
Hemispheric lenses in the hands of a photographer provide an
expanded view of the world across approximately a 180 degree
diagonal field. Until now the primary option available to the
photographer was to render these fisheye images using rectilinear
mapping techniques. These methods have many drawbacks such as
distortion of people near the perimeter and loss of resolution
and data. Although the image is similar to what is seen by the
eye printed the images appear distorted.