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Texture-based automated lithological classification using aeromagnetic anomaly images

November 10, 2009

This report consists of a thesis submitted to the faculty of the Department of Electrical and Computer Engineering, in partial fulfillment of the requirements for the degree of Master of Science, Graduate College, The University of Arizona, 2004

Aeromagnetic anomaly images are geophysical prospecting tools frequently used in the exploration of metalliferous minerals and hydrocarbons. The amplitude and texture content of these images provide a wealth of information to geophysicists who attempt to delineate the nature of the Earth's upper crust. These images prove to be extremely useful in remote areas and locations where the minerals of interest are concealed by basin fill. Typically, geophysicists compile a suite of aeromagnetic anomaly images, derived from amplitude and texture measurement operations, in order to obtain a qualitative interpretation of the lithological (rock) structure. Texture measures have proven to be especially capable of capturing the magnetic anomaly signature of unique lithological units. We performed a quantitative study to explore the possibility of using texture measures as input to a machine vision system in order to achieve automated classification of lithological units. This work demonstrated a significant improvement in classification accuracy over random guessing based on a priori probabilities. Additionally, a quantitative comparison between the performances of five classes of texture measures in their ability to discriminate lithological units was achieved.

Publication Year 2009
Title Texture-based automated lithological classification using aeromagnetic anomaly images
DOI 10.3133/ofr20091206
Authors Vivek Shankar
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 2009-1206
Index ID ofr20091206
Record Source USGS Publications Warehouse
USGS Organization Western Mineral Resources Science Center
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