Earticle

초록

영어

This paper presents a 3D particle position measurement method based on the defocusing concept introduced by A.Pentland with a single camera. Different from the existing approaches, the blur circle is used to identify the blur extent for various defocused particles, and the depth-blur relation is formulated by the modified A.Pentland mathematical formula. And, an eight-step algorithm based on Circular Hough Transform and Quadrant Radius Histogram was given to calculate the 3D particle position. Experiments on real defocused particle images have demonstrated the feasibility of the proposed method for 3D particle position recovery, and the minimum Mean Absolute Error of depth is about 0.18 mm.

목차

Abstract
 1. Introduction
 2. Measurement principles
 3. Basic Theories
  3.1. Circular Hough Transform
  3.2. Radius Histogram
  3.3. Quadrant Radius Histogram
 4. Particle 3D position measurement
  4.1. Particle center and radius update scheme
  4.2. 3D particle position measurement procedure
 5. Implementation and results
  5.1. Experimental setup and defocused particle image acquisition
  5.2. Parameter estimation
  5.3. The results and discussion
 References

키워드

저자

• Xiaoli Bao [ State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology ]
• Muguo Li [ State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Advanced Science and Technology

• 간기

  월간

• pISSN

  2005-4238

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605