title: The application of multi-frequency fringe projection profilometry on the measurement of biological tissues.
abstract: A volume of research has been performed on the optical surface profilometry in the field of biomedicine and the optical system with the phase-measuring method becomes the main emphasis of the research. In this research, a brand new fringe projection profilometry with multiple frequencies is described for measuring the biological tissue. A pork liver, as an object, is regarded as a human organ and a DMD projector is used to generate the multi-frequency fringe patterns. The wrapped phase maps are obtained by means of the five-step phase shifting method and calculated via a peak searching algorithm in which the process of measuring the point on the surface of the object is independent so that the step of unwrapping the phase can be avoided. The final results given are acceptable which confirm this method and suggest its enormous potential for the biomedical measurements.
authors.affiliation: School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Jiang
authors.affiliation: School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Shuhai
authors.initials: S
authors.lastname: Jia
authors.affiliation: School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Xu
authors.affiliation: School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Qingchen
authors.initials: Q
authors.lastname: Bao
authors.affiliation: School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Dong
authors.affiliation: School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.|Shaanxi Hengtong Intelligent Machine Co., Ltd, Xi'an 710049, China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Lian
mesh_terms: D000465:Algorithms; D000818:Animals; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D066298:In Vitro Techniques; D008029:Lighting / Q000379:methods*; D008099:Liver / Q000033:anatomy & histology* / Q000502:physiology; D012031:Refractometry / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013552:Swine
keywords: Biomedicine measurements; fringe projection; peak searching algorithm; phase shifting method