Design General Terms Design, Experimentation, Measurement

We describe the architecture and prototype implementation of an assistive system based on Google Glass devices for users in cognitive decline. It combines the first-person im-age capture and sensing capabilities of Glass with remote processing to perform real-time scene interpretation. The system architecture is multi-tiered. It offers tight end-to-end latency bounds on compute-intensive operations, while ad-dressing concerns such as limited battery capacity and lim-ited processing capability of wearable devices. The system gracefully degrades services in the face of network failures and unavailability of distant architectural tiers