Presentation will begin: Thursday, July 20, 2023 - 8:35 AM EDT
Presented by: Mathieu Marmion, Specim Spectral Imaging
Hyperspectral imaging is a beneficial machine vision technology for various industries. It allows engineers to differentiate between materials with similar physical or visual characteristics, which traditional imaging technology cannot do. Typical applications involve sorting, grading, and quality control, for example in the food and recycling industries.
One of the main benefits of hyperspectral imaging is its high spatial and spectral resolution which enables the detailed characterization of materials in a non-destructive manner. A hyperspectral camera produces images where a spectrum is measured for each pixel, creating a hyperspectral data cube that comprises spatial and spectral information. While hyperspectral imaging provides more information allowing more accurate analysis, dedicated algorithms that can handle multivariable data must be employed to process the data effectively.
This presentation focuses on two different types of algorithms, a non-supervised algorithm, which doesn't require any prior knowledge of samples, such as principal component analysis (PCA), and a supervised algorithm, which requires training of the dataset to teach a model, such as partial least squares discriminant analysis (PLS-DA). Marmion gives examples of quantitative and qualitative modeling of hyperspectral data with different pre-processors.
Marmion shows the effects of the pre-processors, highlighting how they are used to produce models that are more robust and resilient to the most demanding operative conditions. Finally, he also shares how the models based on hyperspectral data work online and gives practical examples of successful real-time applications.
About the presenter
Mathieu Marmion, Ph.D., holds a doctorate in physical geography from the University of Oulu in Finland and a double Master of Science degree in electrical engineering from the Grenoble Institute of Technology (Grenoble INP) in France and the Norwegian University of Science and Technology (NTNU). He has been working at Specim Spectral Imaging for the past 12 years first as a technical sales engineer and a sales manager before becoming the lead applications specialist.