• Adaptively under sampled, circular histogram based image processing for rotation invariant coin detectionMõlder, Ago; Märtens, Olev; Saar, TõnisBEC 2012 : 2012 13th Biennial Baltic Electronics Conference : proceedings of the 13th Biennial Baltic Electronics Conference : October 3-5, 2012, Tallinn, Estonia2012 / p. 137-140 : ill