A method for generating a presentation of region-of-interest in an
information representation including the steps of: selecting a viewpoint
for the region-of-interest; selecting a location for the
region-of-interest; creating a lens surface having a predetermined
location for the region-of-interest; creating a transformed presentation
by: determining a mapping for pixel coordinates from the representation
to the lens surface by applying a distortion function defining said lens
surface to said pixel coordinates; calculating a vector from the
predetermined location to the location; and, copying pixel information
from the representation to the lens surface according to the mapping as
displaced by the vector; and, displaying the transformed presentation on
a display screen to generate the presentation of the region-of-interest.