Patent ID: 7738739
Filing Date: 2010-06-15
Classification: G06T

Abstract:
1. A method of obtaining interpolation filters and feature vectors for use in a method or apparatus for enhancing the spatial resolution of a digital image in which input pixels from a low resolution image are classified and interpolated using said feature vectors and said interpolation filters to form a high resolution image, the method comprising: obtaining a low resolution image from a high resolution source image; classifying, by a processor, a plurality of pixels in the low resolution image into respective context classes using interpolation filters so that each of the plurality of pixels in the low resolution image is allocated to a respective interpolation filter; updating, by the processor, feature vectors for each of the pixels that have been allocated to an interpolation filter; classifying, by the processor, the plurality of pixels in the low resolution image into respective context classes using the feature vectors; updating, by the processor, the interpolation filters; and, repeating the classifying with respect to interpolation filters and feature vectors and updating of feature vectors and interpolation filters until a convergence criterion is met.