title: Constellation of phase singularities in a speckle-like pattern for optical vortex metrology applied to biological kinematic analysis.
abstract: A novel technique for biological kinematic analysis is proposed that makes use of the pseudophase singularities in a complex signal generated from a speckle-like pattern. In addition to the information about the locations and the anisotropic core structures of the pseudophase singularities, we also detect the spatial structures of a cluster of phase singularities, which serves as a unique constellation characterizing the mutual position relation between the individual pseudophase singularities. Experimental results of in vivo measurements for a swimming fish along with its kinematic analysis are presented, which demonstrate the validity of the proposed technique.
authors.affiliation: Department of Mechanical Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom. w.wang@hw.ac.uk
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Yu
authors.initials: Y
authors.lastname: Qiao
authors.forename: Reika
authors.initials: R
authors.lastname: Ishijima
authors.forename: Tomoaki
authors.initials: T
authors.lastname: Yokozeki
authors.forename: Daigo
authors.initials: D
authors.lastname: Honda
authors.forename: Akihiro
authors.initials: A
authors.lastname: Matsuda
authors.forename: Steen G
authors.initials: SG
authors.lastname: Hanson
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Takeda
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena / Q000379:methods*; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D007596:Joints / Q000033:anatomy & histology* / Q000502:physiology*; D009068:Movement / Q000502:physiology*; D055095:Optics and Photonics; D010363:Pattern Recognition, Automated / Q000379:methods*