Journal ArticleDOI
Enhanced packet loss recovery for real time PC-based GigE vision AVI systems
TLDR
This work introduces an optimised error recovery function based on definition of packets of interest POIs that allows for selective lost packet recovery based on their pertinence to subsequent machine vision processing and alleviates the traffic overhead by avoiding non-useful retransmissions.Abstract:
GigE vision could be a viable solution for seamless and cost effective integration of machine vision in manufacturing processes. Transmission delays, inherent to streaming and lost packets protocol implemented within the GigE, often jeopardise the implementation of networked PC-based machine vision. This is related to GigE vision open standard handling data integrity and error control through control and stream protocols GVSP and GVCP that implement data resend functions. In this work, we study the effect of data loss on the real time performance of distributed GigE vision AVI systems. We also introduce an optimised error recovery function based on definition of packets of interest POIs that allows for selective lost packet recovery based on their pertinence to subsequent machine vision processing. This scheme alleviates the traffic overhead by avoiding non-useful retransmissions. This mechanism allows reducing the latency and improving the predictability of such systems.read more
Citations
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Proceedings ArticleDOI
Flexible Image Acquisition Service for Distributed Robotic Systems
TL;DR: FxIS, a flexible image acquisition service targeting distributed robotic systems with event-based communication, supporting acquisition from multiple cameras that is closely synchronized in time, both between the cameras and with the request timestamp is presented.
Flexible Composition of Robot Logic with Computer Vision Services
TL;DR: A distributed architecture is devised, which supports composability of communication-heavy robot logic, as well as flexible coupling of the robot control node with vision services, to realize control of industrial robots.
References
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Ethernet-Based Real-Time and Industrial Communications
TL;DR: This paper details the requirements that an industrial network has to fulfill and shows how Ethernet has been enhanced to comply with the real-time requirements in particular in the industrial context.
Packet Loss Recovery for Streaming Video
Nick Feamster,Hari Balakrishnan +1 more
TL;DR: The effects of packet loss on the quality of MPEG-4 video are quantified, an analytical model is developed, and a mechanism for recovering this data using postprocessing techniques at the receiver is proposed.
Journal ArticleDOI
Development of a real-time laser-based machine vision system to monitor and control welding processes
Wei Huang,Radovan Kovacevic +1 more
TL;DR: In this paper, a laser-based machine vision system is developed and implemented to monitor and control welding processes, which consists of three main modules: a laserbased vision sensor module, an image processing module, and a multi-axis motion control module.
Journal ArticleDOI
Towards zero-defect manufacturing (ZDM)—a data mining approach
TL;DR: In this paper, the authors present a general framework of zero-defect manufacturing (ZDM) and explain how to apply data mining approaches to manufacturing the products with zero defect and demonstrate three ongoing projects demonstrating the practice of using DM approaches for reaching the goal of ZDM.
Journal ArticleDOI
Distributed Camera Networks
TL;DR: This article shows how to develop an end-to-end framework for integrated sensing and analysis in a distributed camera network so as to maximize various scene-understanding performance criteria (e.g., tracking accuracy, best shot, and image resolution).