Two-dimensional measurement of the lens optical transfer function from a digital image. - David P. Morgan-Mar; Matthew R. Arnison; Chris A. Deller; Peter A. Fletcher; Kieran G. Larkin (Digital Photography, 2011)

Focus finding using scale invariant patterns. - David P. Morgan-Mar; Matthew R. Arnison (Digital Photography, 2013)

Depth from defocus using the mean spectral ratio. - David P. Morgan-Mar; Matthew R. Arnison (Digital Photography, 2014)