Patent ID: 8306336
Filing Date: 2012-11-06
Classification: G06T,H04N

Abstract:
1. An apparatus comprising: a digital camera for obtaining a first image comprising a background portion and a foreground portion, wherein the foreground portion comprises written content; and a document processor including a background subtraction mechanism, the background subtraction mechanism including a subsample mechanism, a filter mechanism, and a supersample mechanism to subsample, filter, and subsequently supersample the first image to obtain a background image, the background image having the same resolution as the first image, the background subtraction mechanism further including a difference calculator to form an image with pixel values based on respective differences between pixel values in the foreground image and corresponding pixel values in the background image, wherein the document processor is configured to remove the background portion from the first image to form a foreground image of the written content, and to enhance the foreground image to obtain an enhanced content image, and to overlay the enhanced content image on a white image or a black image.