Featuring DIGITAL ICE™ and DIGITAL ICE Lite™ technology, the Perfection 4490 Photo delivers incredibly powerful support for detecting and removing dust and scratch marks from colour film and slide scans.
DIGITAL ICE differentiates itself from software-only solutions because it does not soften, blur or otherwise alter any underlying details or composition of the original image. Instead, this innovative technology works from within the scanner during the scanning process to provide users with a clear, authentic base image that improves on the original image. This is accomplished by obtaining information about the nature and location of surface and near-surface defects as an image is scanned.
During the typical scanning process, red, green and blue image information is gathered from the RGB channels while DIGITAL ICE scanning uses a fourth channel, referred to as Defect channel (using an infrared LED), to collect the defect information.