Browsing by Author "Reidy, Brendan, author"
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Item Open Access Lightator: an optical near-sensor accelerator with compressive acquisition enabling versatile image processing(Colorado State University. Libraries, 2024-06-23) Morsali, Mehrdad, author; Reidy, Brendan, author; Najafi, Deniz, author; Tabrizchi, Sepehr, author; Imani, Mohsen, author; Nikdast, Mahdi, author; Roohi, Arman, author; Zand, Ramtin, author; Angizi, Shaahin, author; ACM, publisherThis paper proposes a high-performance and energy-efficient optical near-sensor accelerator for vision applications, called Lightator. Harnessing the promising efficiency offered by photonic devices, Lightator features innovative compressive acquisition of input frames and fine-grained convolution operations for low-power and versatile image processing at the edge for the first time. This will substantially diminish the energy consumption and latency of conversion, transmission, and processing within the established cloud-centric architecture as well as recently designed edge accelerators. Our device-to-architecture simulation results show that with favorable accuracy, Lightator achieves 84.4 Kilo FPS/W and reduces power consumption by a factor of ~24× and 73× on average compared with existing photonic accelerators and GPU baseline.