In most cases, the estimated subject color and/or the estimated background color for a given pixel will have a certain amount of error, which could result in either not enough background removal, or removal of all of the background and some of the foreground. By manually or automatically altering the...http://www.google.fr/patents/US6134345?utm_source=gb-gplus-shareBrevet US6134345 - Comprehensive method for removing from an image the background surrounding a selected subject
Comprehensive method for removing from an image the background surrounding a ...