2 papers
math.OC2026
An Inexact Riemannian Gradient Descent Algorithm on the Stiefel Manifold with One Newton-Schulz Iteration
Yuqiu Su, Wen Huang
In this paper, we propose an inexact Riemannian gradient descent algorithm on the Stiefel manifold (IRGS-StieONS) using an adaptive step size, where the ``inexact'' refers to the i…
math.OC2024
SLRQA: A Sparse Low-Rank Quaternion Model for Color Image Processing with Convergence Analysis
Zhanwang Deng, Yuqiu Su, Wen Huang
In this paper, we propose a Sparse Low-rank Quaternion Approximation (SLRQA) model for color image processing problems with noisy observations. %Different from the existing color i…