Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 123 for “"Target detection"”.
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Unsupervised maritime target detection
The unsupervised detection of maritime targets in grey scale video is a difficult problem in maritime video surveillance. Most approaches assume that the camera is static and employ pixel-wise background modelling techniques for foreground detection; other methods rely on colour or thermal …
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Target detection through quantum illumination
Classical target detection can suffer large error probabilities in noisy and lossy environments when noise photons are mistaken for signal photons reflected from an object. It has been shown theoretically that the correlation between entangled photons can be used to better discriminate between the …
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Constraints and invariance in target detection
… hypothesis testing is discussed for purposes of target detection. Invariant tests are proposed and analysed in two contexts. The first involves the use of cyclic permutation invariance as a solution to detecting targets with unknown location in noise. An invariance condition is used to eliminate …
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Target detection in clutter for sonar imagery
… that are present in such images, and with the detection of man-made objects in such images. Side-looking sonar images are, broadly speaking, the result of the physical interaction between acous- tic waves and the bottom of the sea. Because of this interaction, the types of seabed appear as …
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Target detection in left and right hemispace
… aspect of spatial processing, namely the detection of a particular object or target that appears along with other items. In Experiment 1, subjects were asked to detect a target digit within an array of six digits when either all of the items in the array other than the target were the same …
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Adaptive OFDM Radar for Target Detection and Tracking
We develop algorithms to detect and track targets by employing a wideband orthogonal frequency division multiplexing: OFDM) radar signal. The frequency diversity of the OFDM signal improves the sensing performance since the scattering centers of a target resonate variably at different frequencies. …
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Target Detection Using a Wavelet-Based Fractal Scheme
<p>In this thesis, a target detection technique using a rotational invariant wavelet-based scheme is presented. The technique is evaluated on Synthetic Aperture Rader (SAR) imaging and compared with a previously developed fractal-based technique, namely the extended fractal (EF) model. Both …
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Channel response and target detection in shallow water
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996.
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Distributed Target Detection and Coverage for Holonomic UAVs
… as possible to detect and cover as many static targets of unknown location as possible. This algorithm, Pruning-Perception-Decision (PPD), strikes the balance of exploration versus exploitation by maximizing the number of targets covered by each agent. Agents can cover only one grouping of …
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Adaptive MIMO Radar for Target Detection, Estimation, and Tracking
… algorithms to detect, estimate, and track targets using multiple-input multiple-output: MIMO) radar systems. MIMO radar systems have attracted much attention in the recent past due to the additional degrees of freedom they offer. They are commonly used in two different antenna …
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Multi-scale target detection based on morphological shared-weight neural network
… shared-weight neural network (MSNN) for object detection. In this thesis, three combined network structures are developed for multi-scale object detection. The dataset used for the experiments presented here were created by the author for this thesis study. The convolutional neural network is …
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The Relationship Between Color and Inattentional Blindness for Military Target Detection
… color luminance, FOV, or focused attention and detection of the FIST-V. The results did not indicate an association between FOV and detection of the FIST-V [÷2(1, N = 48) = 0.08, p = 1.0]. Nor was there an association between focused attention and detection of the FIST-V using the following …
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Median filtering for target detection in an airborne threat warning system
Detection of point targets and blurred point targets in midwave infrared imagery is difficult because few assumptions can be made concerning the characteristics of the background. In this thesis, real time spatial prefiltering algorithms that facilitate the detection of such targets in an airborne …
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