Daisuke Sugimura
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View article: Lensless facial image identification through joint learning of reconstruction and recognition
Lensless facial image identification through joint learning of reconstruction and recognition Open
Mask-based lensless camera systems, replacing traditional lenses with a thin mask and sensor, offer unique imaging capabilities and enhanced privacy through optical encoding. This paper presents a facial identification system based on lens…
View article: Spatio-Temporal Structure Extraction of Blood Volume Pulse Using Dynamic Mode Decomposition for Heart Rate Estimation
Spatio-Temporal Structure Extraction of Blood Volume Pulse Using Dynamic Mode Decomposition for Heart Rate Estimation Open
This article proposes a novel blood volume pulse (BVP) signal extraction method for heart rate (HR) estimation that incorporates medical knowledge of the spatio-temporal BVP dynamics. Previous methods merely exploited the spatial similarit…
View article: Rate-Adapted Decentralized Learning Over Wireless Networks
Rate-Adapted Decentralized Learning Over Wireless Networks Open
This paper proposes a communication strategy for decentralized learning in wireless systems that employs adaptive modulation and coding capability. The main objective of this work is to address a critical issue in decentralized learning ba…
View article: Network-Density-Controlled Decentralized Parallel Stochastic Gradient Descent in Wireless Systems
Network-Density-Controlled Decentralized Parallel Stochastic Gradient Descent in Wireless Systems Open
This paper proposes a communication strategy for decentralized learning on wireless systems. Our discussion is based on the decentralized parallel stochastic gradient descent (D-PSGD), which is one of the state-of-the-art algorithms for de…
View article: Improvement of Reconstructed Image Quality based on PSF correction in Wavefront Coding by Using Cubic-Phase-Modulation of Coma Aberration
Improvement of Reconstructed Image Quality based on PSF correction in Wavefront Coding by Using Cubic-Phase-Modulation of Coma Aberration Open
本論文では，像面上でのPSFの空間的な変化に着目し，復元に用いるPSFを実際のPSFとの差分が小さくなるように変化させることにより，広い被写界深度を保ちつつ，WFC復元画像の画質改善を実現することを目的とする．単一PSFを拡大縮小回転で変形させた複数のPSFを用いて画像を復元すること，像面でのPSF変化が小さくなるように撮像面を傾斜させることの二つの手法を提案する．シミュレーションと実際の撮像レンズによる実験を行い，被写体距離を変えた場合のWFC復元画像の解像度に関して定量…