1. A method of creating a super-resolved grayscale image from a plurality of lower-resolution images, the method comprising: a. using a data fidelity penalty term, wherein said data fidelity penalty term is an L 1 norm penalty term to enforce similarities between low-resolution data and a high-resolution image estimate; and b. using a spatial penalty term, wherein said spatial penalty term is a penalty term to encourage sharp edges in said high-resolution image.