The aim of the edge thinning process is to remove the inherent edge broadness in gradient images while retaining edge continuity of the image. Such a process is required so that a useful silhouette of the target can b...
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An analysis of the statistics of the moments and the conventional invariant moments shows that the variance of the latter become quite large as the order of the moments and the degree of invariance increases. Moreso, ...
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Feature analysis and classifier design toward real-time FLIR target identification are presented. After tarqet candidates of military vehicles are segmented in a low resolution FLIR scenario,1 a set of 17 features is ...
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A system which accepts a two-dimensional scene as input and produces an image of the scene as output introduces degradations to the image which cause a loss of information about the original scene. A mathematical mode...
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This paper compares the performance of four candidate targetdetection algorithms. The best known of these, "Superslice," was developed at the University of Maryland in 1977-78.1 The other three algorithms a...
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The use of intensity correlation techniques for the detection of passive optical devices is considered. It is assumed that the devices have small angular sizes due to their large distances from the detection system, a...
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A "life size" thermal target array has been developed to facilitate in-flight testing of airborne weapon systems containing night vision subsystems. This in-flight testing to measure the performance of the n...
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The heterodyne detection efficiency of a large-aperture, coherent laser radar, defined as the actual signal-to-noise ratio (SNR) divided by the ideal SNR, is derived for detected phase-front distortions resulting from...
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In deep space surveillance missions using high-sensitivity infrared sensor systems, satellite targets must be detected among a background scene of thousands of stars. Data stream processing must provide early rejectio...
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In deep space surveillance missions using high-sensitivity infrared sensor systems, satellite targets must be detected among a background scene of thousands of stars. Data stream processing must provide early rejection in the processing stages of the star scene to permit targetdetection and to meet the downlink data transmission capacity constraint. Two star-elimination techniques are formulated - a multicolor elimination concept, and a moving target indicator (MTI) technique - and their performance analyzed. Multicolor elimination methods reduce the star scene to a star leakage rate of about 39 stars/deg2; the MTI technique reduces the star scene to a dramatically low star leakage rate - to <0.05 stars/deg2.
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