Fisheye-Hemi 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.
Fisheye-Hemi includes three plug-ins that support a wide range of camera and fisheye lens combinations.
Fisheye-Hemi 1 (Circle) works best with a lens and camera combination that covers 180 degrees horizontally across the field, so the captured image appears with black edges in the corners like a globe in space.
Fisheye-Hemi 2 (Full Frame) works best with a lens and camera combination that covers 180 degrees diagonally, but the captured image has no black edges in the corners. This combination is commonly called a full frame fisheye image.
Fisheye-Hemi 3 (Cropped) works best with a lens and camera combination that covers less than 180 degrees, where the captured image appears almost normal with mild fisheye distortion.
