作者单位:Universitat Politècnica de Catalunya, Department of Optics and Optometry, Group of Applied Optics and Image Processing, Violinista Vellsolà 37, 08222 Terrassa, Spain[1]Academy of Sciences of the Czech Republic, Institute of Information Theory and Automation, Pod Vodárenskou vě?í 4, 18208 Prague 8, Czech Republic[2]