  In recent years, deep neural networks (DNNs) have gained widespread adoption
for continuous mobile object detection (OD) tasks, particularly in autonomous
systems. However, a prevalent issue in their deployment is the
one-size-fits-all approach, where a single DNN is used, resulting in
inefficient utilization of computational resources. This inefficiency is
particularly detrimental in energy-constrained systems, as it degrades overall
system efficiency. We identify that, the contextual information embedded in the
input data stream (e.g. the frames in the camera feed that the OD models are
run on) could be exploited to allow a more efficient multi-model-based OD
process. In this paper, we propose SHIFT which continuously selects from a
variety of DNN-based OD models depending on the dynamically changing contextual
information and computational constraints. During this selection, SHIFT
uniquely considers multi-accelerator execution to better optimize the
energy-efficiency while satisfying the latency constraints. Our proposed
methodology results in improvements of up to 7.5x in energy usage and 2.8x in
latency compared to state-of-the-art GPU-based single model OD approaches.
