Automated classification of single airborne particles from two-dimension, angle-resolved optical scattering (TAOS) patterns

Giovanni F. Crosta; Yong-Le Pan; Richard K. Chang

doi:10.1117/12.883607

16 May 2011 Automated classification of single airborne particles from two-dimension, angle-resolved optical scattering (TAOS) patterns

Giovanni F. Crosta, Yong-Le Pan, Richard K. Chang

Author Affiliations +

Proceedings Volume 8029, Sensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring; and Biometric Technology for Human Identification VIII; 80290Y (2011) https://doi.org/10.1117/12.883607
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

Two-dimension, angle-resolved optical scattering (TAOS) is an experimental technique by which patterns of LASER light intensity scattered by single (micrometer or sub-micrometer sized) airborne particles are collected. In the past 10 years TAOS instrumentation has evolved from laboratory prototypes to field-deployable equipment; patterns are collected by the thousands during indoor or outdoor sampling in short times. Although comparison between experimental and computed scattering patterns has been carried out extensively, there is no satisfactory way to relate a given pattern to the particle it comes from. This paper reports about the ongoing development and implementation of a method which is aimed at classifying patterns, rather than identifying original particles. A machine learning algorithm includes the extraction of morphological features and their multivariate statistical analysis. A classifier is trained and validated in a supervised mode, by relying on patterns from known materials. Then the tuned classifier is applied to the recognition of patterns of unknown origin.

Citation Download Citation

Giovanni F. Crosta, Yong-Le Pan, and Richard K. Chang "Automated classification of single airborne particles from two-dimension, angle-resolved optical scattering (TAOS) patterns", Proc. SPIE 8029, Sensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring; and Biometric Technology for Human Identification VIII, 80290Y (16 May 2011); https://doi.org/10.1117/12.883607

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KEYWORDS

Particles

Light scattering

Scattering

Detection and tracking algorithms

Feature extraction

Image classification

Laser scattering

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