Vortex metrology using circular and elliptical Laguerre Gauss kernels

TL;DR

This paper introduces a generalized Laguerre Gauss Transform with elliptical kernels, enhancing vortex detection and measurement precision in optical and ultrasound imaging.

Contribution

It extends the Laguerre Gauss Transform to include elliptical kernels, allowing for more precise vortex identification and measurement.

Findings

Improved vortex detection accuracy in speckle and ultrasound images.

Enhanced measurement precision and locality for vortices.

Demonstrated applicability in laser and ultrasound imaging contexts.

Abstract

We propose a generalization of the Laguerre Gauss Transform to include elliptical kernels in vortices metrology. To that end, we broaden the original pseudo field obtained using Laguerre Gauss Transform (LGT) that usually includes circularly a symmetric Gaussian core to include two parameters, the widths of the Gaussian filter in two perpendicular directions, thus generating a family of slightly elliptical kernels. This permits the generation of a family of very close vortices that improves the identification of homologous ones and the precision and locality of the measurements. We show examples with laser generated speckle and in ultrasound images.