TY - GEN
T1 - Adaptive voltage scaling to balance energy savings and image quality in cameras
AU - Kodukula, Venkatesh
AU - Manetta, Mason
AU - Likamwa, Robert
N1 - Publisher Copyright:
© 2022 Owner/Author.
PY - 2022/6/27
Y1 - 2022/6/27
N2 - Energy-efficient visual sensing is extremely important to enable battery powered mobile and IoT applications. While several scheduling techniques have been proposed to save the digital power of sensing, the analog power [1] of capturing an image still remains a daunting barrier for a camera's energy-efficiency. To that end, we characterize the power and performance implications of analog voltage scaling on off-the-shelf image sensors. Our characterization reveals that while reducing the analog voltage supplied to image sensor helps promote sensor power efficiency, it also impairs imaging fidelity, specifically by making images brighter and noisier. Furthermore, we find that brighter and noisier images situationally affect the task accuracy of vision applications. In this poster, we propose an investigation towards a system that adaptively scales analog voltage to optimize sensor energy, while respecting the fidelity needs of visual tasks.
AB - Energy-efficient visual sensing is extremely important to enable battery powered mobile and IoT applications. While several scheduling techniques have been proposed to save the digital power of sensing, the analog power [1] of capturing an image still remains a daunting barrier for a camera's energy-efficiency. To that end, we characterize the power and performance implications of analog voltage scaling on off-the-shelf image sensors. Our characterization reveals that while reducing the analog voltage supplied to image sensor helps promote sensor power efficiency, it also impairs imaging fidelity, specifically by making images brighter and noisier. Furthermore, we find that brighter and noisier images situationally affect the task accuracy of vision applications. In this poster, we propose an investigation towards a system that adaptively scales analog voltage to optimize sensor energy, while respecting the fidelity needs of visual tasks.
KW - energy-efficiency
KW - image sensors
KW - voltage scaling
UR - http://www.scopus.com/inward/record.url?scp=85134037842&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85134037842&partnerID=8YFLogxK
U2 - 10.1145/3498361.3538776
DO - 10.1145/3498361.3538776
M3 - Conference contribution
AN - SCOPUS:85134037842
T3 - MobiSys 2022 - Proceedings of the 2022 20th Annual International Conference on Mobile Systems, Applications and Services
SP - 545
EP - 546
BT - MobiSys 2022 - Proceedings of the 2022 20th Annual International Conference on Mobile Systems, Applications and Services
PB - Association for Computing Machinery, Inc
T2 - 20th ACM International Conference on Mobile Systems, Applications and Services, MobiSys 2022
Y2 - 27 June 2022 through 1 July 2022
ER -