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Exploiting the Potential of Self-Supervised Monocular Depth Estimation via Patch-Based Self-Distillation

IEEE Internet of Things Journal 2025年

作者： Yu, Ting Pan, Shan Chen, Wei Tian, Zijian Wang, Zehua Yu, F. Richard Leung, Victor C. M. Postdoctoral Research Station China RongTong Academy of Sciences Group Corporation Limited Beijing100022 China China RongTong Artificial Intelligence Research Center Beijing100022 China China University of Mining and Technology School of Artificial Intelligence Beijing100083 China China University of Mining and Technology School of Computer Science and Technology Xuzhou221116 China School of Artificial Intelligence Beijing100083 China The University of British Columbia Department of Electrical and Computer Engineering VancouverBCV6T 1Z4 Canada Carleton University Department of Systems and Computer Engineering OttawaONK1S 5B6 Canada Shenzhen University College of Computer Science and Software Engineering Shenzhen518060 China

Perceiving scene depth and 3D structure is one of the key tasks for Internet of Video Things (IoVT) devices to understand and interact with the environment. Self-supervised monocular depth estimation has demonstrated significant potential in leveraging large-scale unlabeled datasets to achieve competitive performance, thereby playing an increasingly important role in depth estimation. Despite recent methods providing additional supervisory signals through self-distillation strategies to improve depth estimation, an effective method for generating pseudo-depth labels suitable for addressing occlusion issues among elements far from the camera remains unexplored. To address this limitation, we propose a Patch-based Self-Distillation Learning Framework to exploit the potential of self-supervised monocular depth estimation in recovering fine-grained scene depth. In the proposed framework, elements far from the camera within the input image are enlarged by enlarging and cropping operations in the patch-based self-distillation branch. Guided by photometric consistency, the model learns the detailed occlusion relationships among elements from the enlarged patches, producing patch depth maps with fine structures. In the main branch, which takes full-scale images as input, patch depth maps serve as pseudo-depth labels through self-distillation loss to provide additional supervisory signals for regions where photometric consistency fails to offer effective supervision. This forces the depth estimation network to recover fine structures of elements far from the camera in full-scale input images. Regarding the architecture of the depth estimation network, we introduce a bin-center prediction. In this prediction, a global aggregator based on self-attention provides additional scene structure queries for adaptive scene depth discretization. Finally, to encourage the model to explore more general cues for depth inference beyond road plane cues, we propose a PatchMix data augmentati

关键词： Image enhancement

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Comparison of OOA and real-time SA-from the experiment of analyzing an image filing system

Comparison of OOA and real-time SA-from the experiment of an...

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Conference on Object-Oriented Programming systems, Languages, and Applications, OOPSLA 1993

作者： Yamashiro, Akihiro Nakano, Hiroko Yoshida, Kazuki Saito, Etsuo Research and Development Center Systems and Software Engineering Laboratory Toshiba Corporation Japan

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Access Control to Web Pages Based on User Browsing Behavior 9

Access Control to Web Pages Based on User Browsing Behavior

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2017 9th IEEE International Conference on Communication software and Networks (ICCSN 2017)

作者： Chang Liu Jingsha He Faculty of Information Technology & Beijing Engineering Research Center for IoT Software and Systems Beijing University of Technology

ISBN: (纸本)9781509038237;9781509038220

Nowadays, access control to Web pages relay mostly on identification and authentication. After successful authentication, however, subsequent access may not necessarily be performed by the same user. Aimed at separating identity authentication and behavior authentication in open network environments, this paper proposes an access control method based on the analysis of user behavior in Web browsing as an additional access control mechanism to traditional identity authentication. The paper provides the definition of user behavior, uses browsing time and navigated path to determine the normality of user behavior based on the result of comparing the value calculated using a proposed algorithm with a threshold, thus modeling user behavior in both temporal and spatial dimensions. The proposed method relies on a database that contains the frequency of previous access to the path by the same user. Experiment shows that the proposed method can detect abnormal behavior while adapting to continuous changes in user behavior and can thus be used to prevent the theft of user accounts to improve network security.

关键词： network behavior behavior authentication access control

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Requirements change management process models: An evaluation

Requirements change management process models: An evaluation

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International Conference on software engineering

作者： Ikram, Naveed Ramzan, Saffena Center for Software Systems Engineering Mohammad Ali Jinnah University Pakistan Riphah International University Pakistan

ISBN: (纸本)9780889866416

"Requirements" are one of the major reasons for software-intensive system failures. Most of the requirements related problems emerge as results of changing requirements. To manage changing requirements in a better way many requirements change management (RCM) process models have been proposed in the literature. Process models facilitate human understating and communication, supporting process improvement and process management. Coverage of process elements and representational perspectives has an affect on process model. This paper reports evaluation of current requirements change management process models present in the literature on the basis of process model elements and representations. The aim is to highlight deficiencies in the current RCM process models, and to propose process ontology and the use of business process modeling notion (BPMN) to model RCM process.

关键词： requirements engineering requirements management change management process model

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The extended schematic protection model

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Journal of Computer Security 1992年第3-4期1卷 335-383页

作者： Ammann, Paul E. Sandhu, Ravi S. Center for Secure Information Systems Department of Information and Software Systems Engineering George Mason University Fairfax VA 22030 United States

Access control models provide a formalism and framework for specifying control over access to information and other resources in multi-user computer systems. Useful access control models must balance expressive power with the decidability and complexity of safety analysis (i.e. the determination of whether or not a given subject can ever acquire access to a given object). The access matrix model as formalized by Harrison, Ruzzo, and Ullman (HRU) has very broad expressive power. Unfortunately, HRU also has extremely weak safety properties. Safety is undecidable for most policies of practical interest, even in the monotonie version of HRU {which only allows revocation which is itself reversible). Remarkably, an alternate formulation of monotonie HRU yields strong safety properties. This alternate formulation is called the Extended Schematic Protection Model (ESPM). ESPM is derived from the Schematic Protection Model (SPM) by extending the creation operation to allow multiple parents for a child, as opposed to the conventional create operation of SPM which has a single parent for a child. Despite its equivalence to monotonie HRU, ESPM retains tractable safety analysis for a large class of protection schemes that are of practical interest. In this paper we first show that ESPM is formally equivalent in expressive power to monotonie HRU. Then we give a complete analysis of the safety properties of ESPM for acyclic can-create relations with attenuating loops (i.e., can-create relations which are acyclic except for certain cycles of length one). © 1992, IOS Publishing.

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Cost models for future software life cycle processes: COCOMO 2.0

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Annals of software engineering 1995年第1期1卷 57-94页

作者： Boehm, Barry Clark, Bradford Horowitz, Ellis Westland, Chris Madachy, Ray Selby, Richard USC Center for Software Engineering University of Southern California Los Angeles CA 90089-0781 United States USC Center for Software Engineering and Litton Data Systems United States UC Irvine and Amadeus Software Research United States

Current software cost estimation models, such as the 1981 Constructive Cost Model (COCOMO) for software cost estimation and its 1987 Ada COCOMO update, have been experiencing increasing difficulties in estimating the costs of software developed to new life cycle processes and capabilities. These include non-sequential and rapid-development process models;reuse-driven approaches involving commercial off-the-shelf (COTS) packages, re-engineering, applications composition, and applications generation capabilities;object-oriented approaches supported by distributed middleware;and software process maturity initiatives. This paper summarizes research in deriving a baseline COCOMO 2.0 model tailored to these new forms of software development, including rationale for the model decisions. The major new modeling capabilities of COCOMO 2.0 are a tailorable family of software sizing models, involving Object Points, Function Points, and Source Lines of Code;nonlinear models for software reuse and re-engineering;an exponentdriver approach for modeling relative software diseconomies of scale;and several additions, deletions and updates to previous COCOMO effort-multiplier cost drivers. This model is serving as a framework for an extensive current data collection and analysis effort to further refine and calibrate the model's estimation capabilities. © 1995, J.C. Baltzer AG, Science Publishers. All rights reserved.

关键词： computer software software cost estimation software design Cost estimates computer programs software LIFECYCLE software reuse Costs Diseconomies of scale

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Eliminating polyinstantiation securely

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Computers and Security 1992年第6期11卷 547-562页

作者： Sandhu, Ravi S. Jajodia, Sushil Center for Secure Information Systems Department of Information and Software Systems Engineering George Mason University Fairfax VA 22030 United States

Polyinstantiation has generated a great deal of controversy lately. Some have argued that polyinstantiation and integrity are fundamentally incompatible, and have proposed alternatives to polyinstantiation. Others have argued about the correct definition of polyinstantiation and its operational semantics. In this paper we provide a fresh analysis of the basic problem that we are trying to solve;that is, how can an honest database keep secrets? Our analysis leads us to the concept of restricted polyinstantiation wherein we show how to solve this problem without compromising on any of the following requirements: secrecy, integrity, availability-of-service, element-level labeling and high assurance. This is the first solution to meet all these requirements simultaneously. © 1992.

关键词： Database management systems Multilevel security Polyinstantiation

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Lattice-based enforcement of Chinese Walls

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Computers and Security 1992年第8期11卷 753-763页

作者： Sandhu, Ravi S. Center for Secure Information Systems Department of Information and Software Systems Engineering George Mason University Fairfax VA 22030 United States

The Chinese Wall policy was identified and so named by Brewer and Nash. This policy arises in the financial segment of the commercial sector, which provides consulting services to other companies. Consultants naturally have to deal with confidential company information for their clients. The objective of the Chinese Wall policy is to prevent information flows which cause conflict of interest for individual consultants. Brewer and Nash develop a mathematical model of the Chinese Wall policy, on the basis of which they claim that this policy "cannot be correctly represented by a Bell-LaPadula model." In this paper we demonstrate that the Brewer-Nash model is too restrictive to be employed in a practical system. This is due to their treatment of users and subjects as synonymous concepts, with the consequence that they do not distinguish security policy as applied to human users versus security policy as applied to computer subjects. By maintaining a careful distinction between users, principals and subjects, we show that the Chinese Wall policy is just another lattice-based information policy which can be easily represented within the Bell-LaPadula framework. © 1992.

关键词： Bell-LaPadula model Chinese Wall policy Lattice model

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Requirements engineering metamodel: An integrated view of requirements 15

Requirements engineering metamodel: An integrated view of re...

引用

15th Annual International Computer software and Applications Conference, CMPSAC 1991

作者： Jordan, Kathleen A. Davis, Alan M. George Mason University Center for Software Systems Engineering FairfaxVA United States

ISBN: (纸本)0818621524

Currently there exist dozens of techniques for the specification of software and system-level requirements. While there are unique aspects to every requirements technique that make it appropriate for a particular use, there are also many areas of commonality between the various requirements models. To address the proliferation of techniques, we have developed a requirements metamodel that captures the elements of commonly used requirements techniques. The objective of the metamodel is to capture the semantics of the existing models while eliminating redundant areas and recognizing unique ones. © 1991 IEEE.

关键词： Semantics

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A model for estimating agile project process and schedule acceleration

A model for estimating agile project process and schedule ac...

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2013 International Conference on software and systems Process, ICSSP 2013

作者： Ingold, Dan Boehm, Barry Koolmanojwong, Supannika Center for Systems and Software Engineering University of Southern California Los Angeles United States

ISBN: (纸本)9781450320627

Accelerating development schedules is increasingly important in a competitive world. Reduced time-to-market is a key response to competitive threats in the commercial sphere, and rapid response in deploying military systems may save lives in a geopolitical environment characterized by rapidly emerging and everchanging physical threats. Agile/lean development methodologies show promise in providing the desired schedule acceleration, but it can be difficult for planners to determine the effects of these factors on schedule duration, and to make appropriate choices to optimize project performance. The Constructive Rapid Application Development Model (CORADMO) attempts to quantify the effects of key schedule drivers, and thus enable planners to estimate the relative schedule that will result from varying these parameters. Copyright 2013 ACM.

关键词： Planning

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