Publication detail
Implementation of an autofocus algorithm based on searching the best in-focus image into a table-top laser-induced breakdown spectroscopy setup
NOVOTNÝ, J. MALINA, R. KAISER, J. LIŠKA, M. GALIOVÁ, M.
English title
Implementation of an autofocus algorithm based on searching the best in-focus image into a table-top laser-induced breakdown spectroscopy setup
Type
Peer-reviewed article not indexed in WoS or Scopus
Language
en
Original abstract
Laser-ablation based spectrochemical analytical methods could be used in applications in which the capability for spatially resolved analysis is required. Such analysis gives a 2-D or 3-D map of the monitored chemical elements. Here we introduce automation of a 2-D surface analysis in the laser-induced breakdown spectroscopy setup by implementation of an autofocus algorithm based on the evaluation of the image sharpness. The most suitable algorithm with respect to its speed, accuracy, and durability against digital noise is chosen by testing different gradient-based methods and methods working in the frequency domain.
Keywords in English
automatic focusing; autofocus; image sharpness; laser induced breakdown spectroscopy; Fourier transform; Pearson correlation; digital noise
Released
2009-10-26
ISSN
0091-3286
Journal
OPTICAL ENGINEERING
Volume
48
Number
10
Pages from–to
103604-1–103604-10
Pages count
10