Registration for super-resolution: Theory, algorithms, and applications in image and mobile video enhancement

© 2011 by Taylor and Francis Group, LLC. The relation between sensor resolution and the optics of a digital camera is determined by the Nyquist sampling theorem: the sampling frequency should be larger than twice the maximum frequency of the image content coming out of the optical system. If a lower resolution is used, the output is aliased. Aliasing in digital images is often considered as a nuisance and (both optical and digital) filters are designed to avoid aliasing in digital cameras. However, aliasing also contains extra high-frequency information with additional details about the scene. Super-resolution algorithms extract the information present in the aliasing to reconstruct a higher-resolution image.status: publishe