A technique, referred to as area-based interpolation, performs image interpolation. The system determines a curve by the pixel value at a location by taking the integral of a curve over a small area, where the size of the area is determined by the sampling size of a sampling cell. When the...http://www.google.com.hk/patents/US5796879?utm_source=gb-gplus-share專利 US5796879 - Area based interpolation for image scaling
