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Data from a recent experiment in which an airborne sensor collected data for a variety of targets are used to identify exploit performance factors that need to be included into the model to quantify end-to-end sensor exploit performance. The primary targets consisted of an array of blue tarpaulins cut to sizes less than and greater than one HSI spatial pixel projected to the ground. We designed the experiment to quantify and compare the effects of target size on ROC curves. One key result of this work is that the radiance of targets in the scene exhibits a large degree of variation among many passes during two days of flight testing. This variability complicates the detection process. Another key result is that detection performance has a strong correlation with target size for subpixel targets. Finally, we demonstrate that in this case, sensor noise has little impact on detection performance. |
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