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E. N. Malamas

Bio: E. N. Malamas is an academic researcher from Technical University of Crete. The author has contributed to research in topics: Mobile QoS & Quality of service. The author has an hindex of 5, co-authored 6 publications receiving 720 citations.

Papers
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Journal ArticleDOI
TL;DR: The state of the art in machine vision inspection and a critical overview of real-world applications are presented and two independent ways to classify applications are proposed.

716 citations

Journal ArticleDOI
01 May 2000
TL;DR: An improved architecture is presented, that performs dilation and erosion in half the time compared to other architectures, using a workload partitioning technique and the modularity of the proposed architectures allows the direct extension to 2-dim morphology.
Abstract: In this paper we present novel systolic architectures for the fast execution of common morphological operations, that is dilation, erosion, closing, and opening. Their novelty stems from the fact that the same unit, the combined Erosion-Dilation Architecture (EDA), is used to perform either dilation, or erosion, or both of them in parallel (depending on control signals). The proposed architectures show a major advantage on using reduced resources for storing the structuring element (SE), lead to full resource utilization, and provide high processing rates. We concentrate on 1-dim structuring elements and present an improved architecture, that performs dilation and erosion in half the time compared to other architectures, using a workload partitioning technique. Furthermore, the amenability of the EDA to VLSI implementation is exemplified by a processor that performs binary morphological operations with 1 × 3 structuring sets. Finally, we show that the modularity of the proposed architectures allows the direct extension to 2-dim morphology.

29 citations

Proceedings ArticleDOI
06 Jul 1999
TL;DR: A new model for the definition and the implementation of quality of service (QoS) in distributed multimedia systems is introduced and the model is reduced to a general asset allocation problem (GA/sup 2/P) and it is solved in a provably optimal way.
Abstract: In this paper we introduce a new model for the definition and the implementation of quality of service (QoS) in distributed multimedia systems. The model provides both the users and the provider/manager of the system with a framework for the high level description of the system's configuration and operation, as well as with an application/user specific definition of QoS. The model maps this high level QoS description to quality requirements for the individual resources that compose the overall service. The implementation of the QoS of the overall service is done by providing probability of availability guarantees for certain levels of QoS. Given some constraints on the total assets available for the implementation of a specific service, the model computes the optimal utilisation of the system resources to implement a specific user/application QoS profile. The model is reduced to a general asset allocation problem (GA/sup 2/P) and we solve the GA/sup 2/P in a provably optimal way for a wide range of realistic services.

12 citations

Journal ArticleDOI
TL;DR: A new model for the definition and the implementation of quality of service (QoS) in distributed multimedia systems is introduced and the GA2P is reduced to a General Asset Allocation Problem (GA2P) and solved in a provably optimal way.
Abstract: In this paper we introduce a new model for the definition and the implementation of quality of service (QoS) in distributed multimedia systems. The model provides both the users and the provider/manager of the system with a framework for the high level description of the system's configuration and operation, as well as with an application/user specific definition of QoS. The model maps this high level QoS description to quality requirements for the individual resources that compose the overall service. The implementation of the QoS of the overall service is done by providing probability of availability guarantees for certain levels of QoS. Given some constraints on the total assets available for the implementation of a specific service, the model optimally allocates these assets to the system resources in order to implement a specific user/application QoS profile. The model is reduced to a General Asset Allocation Problem (GA2P) and we solve the GA2P in a provably optimal way for a wide range of realistic services.

8 citations

Book
01 Jan 2001
TL;DR: It is demonstrated by a videoconference example that MEQA3 is an easy to implement low complexity architecture and monitors the QoS of the applications on the user's side and if this exceeds the user specifications then dynamically adapts applications to the current situation.
Abstract: We present MEQA3 application adaptation architecture. MEQA3 manages QoS in two different points of the service activity, 1) the setup/initialisation period and 2) the service period. During the initialisation phase, the system performs an overall optimal QoS to application allocation considering the user requests, the estimated service requirements and the resource constraints. However, during the service time a resource overloading may occur either by bad initial estimation of application requirements or by some unexpected event that limits its performance. Thus, MEQA3 monitors the QoS of the applications on the user's side and if this exceeds the user specifications then dynamically adapts applications to the current situation. We demonstrate by a videoconference example that MEQA3 is an easy to implement low complexity architecture.

7 citations


Cited by
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Journal ArticleDOI
TL;DR: It is argued that the next step in the evolution of object recognition algorithms will require radical and bold steps forward in terms of the object representations, as well as the learning and inference algorithms used.

312 citations

Journal ArticleDOI
TL;DR: Review of various optical inspection approaches in the semiconductor industry and categorize the previous literatures by the inspection algorithm and inspected products to achieve a high robustness and computational efficiency of automated visual inspection.

224 citations

Journal ArticleDOI
TL;DR: This paper intends to survey and evaluate recent advances in data acquisition and progressing, and provide an overview from a manufacturing perspective, some potential manufacturing applications introduced, the technical gaps between the practical requirements and existing technologies discussed, and research opportunities identified.
Abstract: A critical task of vision-based manufacturing applications is to generate a virtual representation of a physical object from a dataset of point clouds. Its success relies on reliable algorithms and tools. Many effective technologies have been developed to solve various problems involved in data acquisition and processing. Some articles are available on evaluating and reviewing these technologies and underlying methodologies. However, for most practitioners who lack a strong background on mathematics and computer science, it is hard to understand theoretical fundamentals of the methodologies. In this paper, we intend to survey and evaluate recent advances in data acquisition and progressing, and provide an overview from a manufacturing perspective. Some potential manufacturing applications have been introduced, the technical gaps between the practical requirements and existing technologies discussed, and research opportunities identified.

176 citations

Journal ArticleDOI
TL;DR: A survey on the latest methods of moving object detection in video sequences captured by a moving camera and presents the main methods which proposed improvements in the general concept of the techniques.

176 citations

Journal ArticleDOI
TL;DR: A new 3D dynamic imaging technique, Micro Fourier Transform Profilometry (μFTP), which can realize an acquisition rate up to 10,000 3D frame per second (fps), and reconstruct an accurate, unambiguous, and distortion-free 3D point cloud with every two projected patterns.

171 citations