2017/08/31 by Harun Yücel, Nazmi Turan Okumuşoğlu · 10 citations
Computer Science · Mathematics · Physics and Astronomy · #Colloidal particle #Force Microscopy Techniques and Applications #Image (mathematics) #Intensity (physics) #Medical Image Segmentation Techniques #Particle (ecology) #Point processes and geometric inequalities #Symmetry (geometry) #Tracking (education) #Work (physics) #cond-mat.soft #physics.ins-det #physics.optics
paper · pdf · doi:10.1088/1361-648x/aa908e
published in Journal of Physics Condensed Matter 29(46), 465101 (IOP Publishing) · 14 pages, 5 figures
openalex created_date 2017/08/31 · openalex publication_date 2017/10/03 · arxiv created 2017/10/25 · arxiv updated 2017/10/26 · openalex updated_date 2026/08/05
In this paper, we propose a new algorithm based on radial symmetry center method to track colloidal particles close to contact, where the optical images of the particles start to overlap in digital video microscopy. This overlapping effect is important to observe the pair interaction potential in colloidal studies and it appears as additional interaction in the measurement of the interaction with conventional tracking analysis. The proposed algorithm in this work is simple, fast and applicable for not only two particles but also three and more particles without any modification. The algorithm uses gradient vectors of the particle intensity distribution, which allows us to use a part of the symmetric intensity distribution in the calculation of the actual particle position. In this study, simulations are performed to see the performance of the proposed algorithm for two and three particles, where the simulation images are generated by using fitted curve to experimental particle image for different sized particles. As a result, the algorithm yields the maximum error smaller than 2 nm for [Formula: see text] μm silica particles in contact condition.