A method for generating a presentation of a region-of-interest within an original image for display on a display screen, the region-of-interest being at a depth within the original image and being occluded by a portion of the original image at a lesser depth, the method comprising: applying graduated...http://www.google.com/patents/US7983473?utm_source=gb-gplus-sharePatent US7983473 - Transparency adjustment of a presentation
