An approach to subsea survey for safe naval transit

Nguyen, Bao; Bays, Matthew J.; Shende, Apoorva; Stilwell, Daniel J.

doi:10.23919/oceans.2011.6107225

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…The IMVP approach developed in this article is tested on a variety of target fields and compared to the state-of-the-art multiview planning methods known as MAC and clustered MAC (CMAC) [1], [2], [38], [69], [70]. Because the objects' locations and features used for classification all influence the UUV-based sensor performance, the IMVP approach is demonstrated first by considering different object layouts (Section VII-A) and, then, different classification sets (Section VII-B) using the simulation environment described in Section VI.…”

Section: Imvp Performance Resultsmentioning

confidence: 99%

“…In the following sections, the IMVP performance is demonstrated for a variety of target fields characterized by different layouts (Section VII-A) and classification features (Section VII-B). In every case study, the IMVP performance is compared to the MAC algorithm, which plans the shortest multiview path to cover every object using a fixed preplanned number of aspect angles, such that every object is detected at least once from each aspect angle [1], [38], [69], [70]. The MAC path may be inefficient for sparse object layouts, requiring the UUV-based sensor to travel long times without observing any objects [1], [38], [69], [70].…”

Section: Imvp Performance Resultsmentioning

confidence: 99%

“…In every case study, the IMVP performance is compared to the MAC algorithm, which plans the shortest multiview path to cover every object using a fixed preplanned number of aspect angles, such that every object is detected at least once from each aspect angle [1], [38], [69], [70]. The MAC path may be inefficient for sparse object layouts, requiring the UUV-based sensor to travel long times without observing any objects [1], [38], [69], [70]. The modification proposed in [2], known as CMAC, overcomes this limitation by designing the path based on the size of object clusters that may occur in applications with man-made TOIs [71], [72].…”

Section: Imvp Performance Resultsmentioning

confidence: 99%

“…Previous multiview planning studies showed that path performance depends strongly on the object layout [1], [2], [38], [69], [70]. In particular, algorithms that perform well for objects uniformly distributed spatially, at random, over the ROI may not perform adequately when objects are laid out into clusters, and viceversa.…”

Section: A Influence Of Object Location On Imvp Performancementioning

confidence: 99%

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Informative Multiview Planning for Underwater Sensors

Shin

Chang

Weaver

et al. 2022

IEEE J. Oceanic Eng.

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Many modern imaging sensors must obtain multiple looks or "views" of a target at different orientations to automatically classify it with high confidence. Therefore, when tasked with classifying many targets, a mobile sensor may need to travel a long distance to change its position and orientation relative to every target, resulting in costly and time-consuming operations. This article presents a novel and general approach, referred to as informative multiview planning (IMVP) that simultaneously determines the most informative sequence of views and the shortest path between them. The approach is demonstrated on an underwater multitarget classification problem in which a sidescan sonar installed on an unmanned underwater vehicle must classify all targets in minimum time. Simulation and experimental results show that IMVP can achieve the same, or better, classification performance in half the time of existing multiview path planning methods. Also, by determining the most informative views and the shortest path between them, IMVP significantly improves classification efficiency, classification confidence level, as well as performance robustness.

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Section: Imvp Performance Resultsmentioning

confidence: 99%

Section: Imvp Performance Resultsmentioning

confidence: 99%

Section: Imvp Performance Resultsmentioning

confidence: 99%

Section: A Influence Of Object Location On Imvp Performancementioning

confidence: 99%

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Informative Multiview Planning for Underwater Sensors

Shin

Chang

Weaver

et al. 2022

IEEE J. Oceanic Eng.

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“…12 This tactic is simple, robust, and easy to implement. An example of this implementation with more than two looks is called the star pattern by Nguyen et al 21 The second-best expected probability of detection results from using random looks. By choosing each look angle in a uniformly independent and random way, there is a high chance that the look angles are similar to the equally spaced angles.…”

Section: Discussionmentioning

confidence: 99%

Modeling the expected detection probability for mine countermeasure operations based on cross-section and multiple looks

Nguyen¹,

Mirshak²

2016

Journal of Defense Modeling & Simulation

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We present a methodology to determine the expected probability of detection of a target based on multiple looks or angles: tactics and cross-sections. While previous studies confirm that the general probability of detection improves significantly with the number of looks, our findings demonstrate that this value can vary substantially depending on search and detection tactics, as well as the target's cross-section. We argue that the angular dependence of the detection process is often overlooked for search and detection missions, but that this can be elegantly accounted for when assuming symmetrical targets. Consequently, we investigate three tactics where each look is independent: first, a globally optimal tactic where all look angles are equally spaced; second, a tactic which distributes the look angles randomly; and third, a tactic which imposes the same angle for all look angles. We are also able to use the first tactic to extract the guaranteed best angle of the broad side of a target, and additionally for each tactic we propose an example of a corresponding search pattern. We hope that our findings in this paper increase awareness within the search and detection community of the phenomenologies of multiple looks, and that our presented methodology can be incorporated into the mine search and detection tactics.

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