Title :
Defocus Polar rOse Estimation Method (POEM): A Fast Defocus Estimation Method for STEM
Author :
Tejada, Arturo ; den Dekker, Arnold J.
Author_Institution :
Delft Center for Syst. & Control, Delft Univ. of Technol. (DUT), Delft, Netherlands
Abstract :
The defocus Polar rOse Estimation Method (POEM) has been introduced recently as an alternative method for defocus estimation in scanning transmission electron microscopy. Its principle of operation is expanded here to include more realistic image models. The details of the expansion are discussed in depth along with the results of new simulation-based performance tests that take into account the effect of measurement noise. The results clearly show that the defocus POEM has the potential to be fast and accurate.
Keywords :
measurement errors; scanning-transmission electron microscopy; POEM; STEM; defocus estimation method; measurement noise; polar rose estimation method; realistic image model; transmission electron microscopy; Adaptive optics; Correlation; Detectors; Estimation; Lenses; Microscopy; Optical imaging; Automatic control; focusing; parameter estimation; time series analysis; transmission electron microscopy;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2012.2193650
