Target detection algorithms determine the presence of a target in a pixel by comparing the spectrum of a given pixel to the both the target and an estimate of the background. Because of this target detection performance is particularly sensitive to the way that the background is characterized. We will investigate the performance of a number of Background Characterization Methods (BCMs) described by J. West by applying the S. Rotman target implantation method.
Our goal will be to determine which BCM works best for a particular image and a particular target when using the Generalized Likelihood Ratio Test (GLRT) target detector.
Normally, target detection performance is quantified in some image wide metric, such as the Average False Alarm Rate (AFAR). We develop a method that allows us to evaluate target detection performance on a pixel by pixel basis for each of the BCMs. We decompose the unstructured background detector into a number of components that allow us to reconstruct the detection statistics for any unstructured background detector at any arbitrary target concentration. This allows us to calculate the minimum target concentration required to detect a target while maintaining a given Constant False Alarm Rate (CFAR). We can then compare this minimum concentration to determine the optimal background for each pixel.
This method has been applied to the Forest Radiance I image collected over the U.S. Army Aberdeen Proving Ground in August 1995, as well as the Desert Radiance II image collected over the U.S. Army's Yuma Proving Ground in Arizona in June 1995.
Library of Congress Subject Headings
Remote sensing--Data processing; Image processing--Digital techniques; Computer algorithms
Imaging Science (MS)
Department, Program, or Center
Chester F. Carlson Center for Imaging Science (COS)
John R. Schott
Ferdinandus, Manuel R., "Selection of Optimal Background Estimation Methods for Unstructured Detectors" (2007). Thesis. Rochester Institute of Technology. Accessed from
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