Combining 2D synchrosqueezed wave packet transform with optimization for crystal image analysis

Published

Journal Article

© 2016 Elsevier Ltd. All rights reserved. We develop a variational optimization method for crystal analysis in atomic resolution images, which uses information from a 2D synchrosqueezed transform (SST) as input. The synchrosqueezed transform is applied to extract initial information from atomic crystal images: crystal defects, rotations and the gradient of elastic deformation. The deformation gradient estimate is then improved outside the identified defect region via a variational approach, to obtain more robust results agreeing better with the physical constraints. The variational model is optimized by a nonlinear projected conjugate gradient method. Both examples of images from computer simulations and imaging experiments are analyzed, with results demonstrating the effectiveness of the proposed method.

Full Text

Duke Authors

Cited Authors

  • Lu, J; Wirth, B; Yang, H

Published Date

  • April 1, 2016

Published In

Volume / Issue

  • 89 /

Start / End Page

  • 194 - 210

International Standard Serial Number (ISSN)

  • 0022-5096

Digital Object Identifier (DOI)

  • 10.1016/j.jmps.2016.01.002

Citation Source

  • Scopus