1 code implementation • 10 Nov 2023 • Russell Alan Hart, Linlin Yu, Yifei Lou, Feng Chen
A large number of literature relies on uncertainty quantification to evaluate the reliability of a learning model, which is particularly important for applications of out-of-distribution (OOD) detection and misclassification detection.
1 code implementation • 1 Jul 2023 • Kevin Bui, Yifei Lou, Fredrick Park, Jack Xin
Poisson noise commonly occurs in images captured by photon-limited imaging systems such as in astronomy and medicine.
no code implementations • 17 Mar 2023 • Zheng Tan, Longxiu Huang, HanQin Cai, Yifei Lou
Tensor completion is an important problem in modern data analysis.
1 code implementation • 6 Jan 2023 • Kevin Bui, Yifei Lou, Fredrick Park, Jack Xin
In this paper, we aim to segment an image degraded by blur and Poisson noise.
no code implementations • 10 Mar 2022 • Yaghoub Rahimi, Sung Ha Kang, Yifei Lou
Motivated by re-weighted $\ell_1$ approaches for sparse recovery, we propose a lifted $\ell_1$ (LL1) regularization which is a generalized form of several popular regularizations in the literature.
1 code implementation • 21 Feb 2022 • Kevin Bui, Yifei Lou, Fredrick Park, Jack Xin
In this paper, we design an efficient, multi-stage image segmentation framework that incorporates a weighted difference of anisotropic and isotropic total variation (AITV).
no code implementations • 4 Jan 2021 • Chao Wang, Min Tao, Chen-Nee Chuah, James Nagy, Yifei Lou
Consequently, we postulate that applying L1/L2 on the gradient is better than the classic total variation (the L1 norm on the gradient) to enforce the sparsity of the image gradient.
no code implementations • 31 May 2020 • Chao Wang, Min Tao, James Nagy, Yifei Lou
In this paper, we consider minimizing the L1/L2 term on the gradient for a limited-angle scanning problem in computed tomography (CT) reconstruction.
1 code implementation • 9 May 2020 • Kevin Bui, Fredrick Park, Yifei Lou, Jack Xin
In a class of piecewise-constant image segmentation models, we propose to incorporate a weighted difference of anisotropic and isotropic total variation (AITV) to regularize the partition boundaries in an image.
no code implementations • 5 Jun 2019 • Feng Liu, Li Wang, Yifei Lou, Ren-cang Li, Patrick Purdon
Traditional EEG/MEG Source Imaging (ESI) methods usually assume that either source activity at different time points is unrelated, or that similar spatiotemporal patterns exist across an entire study period.
no code implementations • 20 Dec 2018 • Yaghoub Rahimi, Chao Wang, Hongbo Dong, Yifei Lou
In this paper, we study the ratio of the $L_1 $ and $L_2 $ norms, denoted as $L_1/L_2$, to promote sparsity.