A simple experimental procedure to quantify image noise in the context of strain measurements at the microscale using DIC and SEM images
Solid Mechanics Laboratory, CNRS UMR 7649, Department of
Mechanics, École polytechnique ParisTech, 91128
2 Laboratoire Navier, École des ponts ParisTech, Université Paris Est, Champs-sur-Marne, 77455 Marne-la-Vallée cedex 2, France
a e-mail: email@example.com
Image noise is an important factor that inﬂuences the accuracy of strain ﬁeld measurements by means of digital image correlation and scanning electron microscope (SEM) imaging. We propose a new model to quantify the SEM image noise, which extends the classical photon noise model by taking into account the brightness setup in SEM imaging. Furthermore, we apply this model to investigate the impact of diﬀerent SEM setting parameters on image noise, such as detector, dwell time, spot size, and pressure in the SEM chamber in the context of low vacuum imaging.
© Owned by the authors, published by EDP Sciences, 2010