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.

Original Title

Implementation of an autofocus algorithm based on searching the best in-focus image into a table-top laser-induced breakdown spectroscopy setup

Type

journal article - other

Language

English

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

automatic focusing; autofocus; image sharpness; laser induced breakdown spectroscopy; Fourier transform; Pearson correlation; digital noise

Authors

NOVOTNÝ, J.; MALINA, R.; KAISER, J.; LIŠKA, M.; GALIOVÁ, M.

RIV year

2009

Released

26. 10. 2009

ISBN

0091-3286

Periodical

Optical Engineering

Year of study

48

Number

10

State

United States of America

Pages from

103604-1

Pages to

103604-10

Pages count

10