1. A method for determining a high resolution image comprising: (a) receiving a low resolution image; (b) determining a vector for a patch of said low resolution image based upon a low resolution dictionary; (c) determining a high resolution patch based upon a high resolution dictionary and said vector; (d) determining said high resolution image based upon said high resolution patch in a manner suitable to enhance the visual appearance of the high resolution image compared to said low resolution image and free from a constraint of reconstructing an original high resolution image corresponding to said low resolution image.