Utility-Aware Load Shedding for Real-time Video Analytics at the Edge
Enrique Saurez, Harshit Gupta, Henriette Roger, Sukanya Bhowmik,, Umakishore Ramachandran, Kurt Rothermel

TL;DR
This paper presents a utility-aware load shedding method for real-time video analytics at the edge, which intelligently drops uninteresting frames to meet latency constraints and reduce resource usage.
Contribution
It introduces a lightweight, pixel-based utility scoring system and a dynamic control loop to adaptively drop frames, improving efficiency without sacrificing important data.
Findings
Effectively identifies and retains frames with objects of interest.
Reduces computational and network load significantly.
Maintains end-to-end latency constraints with minimal overhead.
Abstract
Real-time video analytics typically require video frames to be processed by a query to identify objects or activities of interest while adhering to an end-to-end frame processing latency constraint. Such applications impose a continuous and heavy load on backend compute and network infrastructure because of the need to stream and process all video frames. Video data has inherent redundancy and does not always contain an object of interest for a given query. We leverage this property of video streams to propose a lightweight Load Shedder that can be deployed on edge servers or on inexpensive edge devices co-located with cameras and drop uninteresting video frames. The proposed Load Shedder uses pixel-level color-based features to calculate a utility score for each ingress video frame, which represents the frame's utility toward the query at hand. The Load Shedder uses a minimum utility…
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Taxonomy
TopicsImage and Video Quality Assessment · Visual Attention and Saliency Detection · Advanced Computing and Algorithms
