A review of surface roughness measurements based on laser speckle method

M Shao, D Xu, S Li, X Zuo, C Chen, G Peng… - Journal of Iron and Steel …, 2023 - Springer
Surface roughness is commonly used to characterize material microstructure during
processing, and accurate measurement of surface roughness is the premise and foundation …

Lacunarity exponent and Moran index: A complementary methodology to analyze AFM images and its application to chitosan films

EP Pinto, MA Pires, RS Matos, RRM Zamora… - Physica A: Statistical …, 2021 - Elsevier
In this work, we developed new scripts to calculate the lacunarity exponent and Moran's
index of Atomic Force Microscopy (AFM) images. The lacunarity exponent was estimated by …

Surface roughness evaluation of electrical discharge machined surfaces using wavelet transform of speckle line images

JM Ali, HS Jailani, M Murugan - Measurement, 2020 - Elsevier
The surfaces produced by electrical discharge machine (EDM) were illuminated using a
redline laser source and the speckle line images of the specimens were captured using a …

Comparison of correlation between 3D surface roughness and laser speckle pattern for experimental setup using he-ne as laser source and laser pointer as laser …

SB Jayabarathi, MM Ratnam - Sensors, 2022 - mdpi.com
Correlation between 3D surface roughness and characteristic features extracted from laser
speckle pattern was done using an inexpensive laser pointer and a digital single lens reflex …

[HTML][HTML] Investigation of copper and zinc alloy surface exposed to corrosion environment by digital image processing

PC da Silva, CFL Junior, JAO Huguenin… - Journal of Materials …, 2023 - Elsevier
Usually, corrosion processes on brass, which are manifested by discoloration of the metal or
alloy surface, are a little destructive and slow in natural environment or non-acid solutions. In …

[HTML][HTML] Machine learning classification of speckle patterns for roughness measurements

VM Castilho, WF Balthazar, L da Silva, TJP Penna… - Physics Letters A, 2023 - Elsevier
Abstract Classification based on Machine Learning (ML) algorithms has received particular
attention in many fields. By associating speckle patterns of depolarized light produced by …

Correlation study of 3D surface roughness of milled surfaces with laser speckle pattern

SB Jayabarathi, MM Ratnam - Sensors, 2022 - mdpi.com
Current studies are focused on the correlation between characteristic features extracted from
the laser speckle pattern of machined surfaces and 2D surface roughness parameters …

A multiparameter surface roughness evaluation model of cold-rolled strips using laser speckle images

M Shao, D Xu, G Peng, S Li, J Zhang, X Wang, Q Yang - Measurement, 2022 - Elsevier
With the wide use of cold-rolled strips, the conventional contact measurement of strip surface
roughness cannot meet the requirements of nondestructiveness, high precision, short …

Evaluation of surface roughness of a machined metal surface based on laser speckle pattern

D Xu, Q Yang, F Dong… - The Journal of …, 2018 - Wiley Online Library
The surface roughness of a machined metal surface is crucial to its appearance and
performance. There are hardly any in‐situ methods for surface roughness measurement of …

Non-contact surface roughness measurement using laser speckle technique

DR Patel, MB Kiran - IOP Conference Series: Materials Science …, 2020 - iopscience.iop.org
This paper deals with selected contact type stylus method and non-contact type machine
vision method using laser speckle for components prepared by grinding of AISI 1040 steel …