Many multi-dimensional signals appear in the real world, such as digital images and data that has spatial and temporal dimensions. How to show the spectrum of these multi-dimensional signals correctly is a key challenge in the field of graph signal processing. This paper investigates the novel transform for multi-dimensional signals defined on Cartesian product graph and studies several related properties. Our work includes: (i) defining the multi-dimensional graph fractional Fourier transform (MGFRFT) based on Laplacian matrix and adjacency matrix; (ii) exploring the advantages of MGFRFT in processing multi-dimensional signals in terms of spectrum and computational time; (iii) applying the proposed transform to data compression to highlight the utility and effectiveness of it.
School of Mathematics and Statistics, Nanjing University of Information Science and Technology(南京信息工程大学数学与统计学院);Hubei Key Laboratory of Applied Mathematics, Hubei University(湖北大学应用数学湖北省重点实验室)
Optimal Sampling and Reconstruction of Graph Signals in the Fractional Fourier Domain
Nanjing University of Information Science and Technology(南京信息工程大学);Hubei University(湖北大学);Shanghai Jiao Tong University(上海交通大学);Nanjing Institute of Technology(南京工程学院)
A Unified Framework for 2D Nonseparable Fractional Fourier Transform: From Geometric Completeness to Applications
Nanjing University of Information Science and Technology(南京信息工程大学);Hubei University(湖北大学);Shanghai Jiao Tong University(上海交通大学);Hainan Normal University(海南师范大学)
A Unified Fractional Spectral Framework for Spatiotemporal Graph Signals: Bi-Fractional Transform and Geodesic Coupling
Nanjing University of Information Science and Technology(南京信息工程大学);Nanjing Institute of Technology(南京工程学院);Jiangsu Province Engineering Research Center of IntelliSense Technology and System(江苏省智能感知技术与系统工程研究中心);Hubei Key Laboratory of Applied Mathematics, Hubei University(湖北大学 应用数学湖北省重点实验室);Key Laboratory of System Control and Information Processing, Ministry of Education, Shanghai Jiao Tong University(上海交通大学 教育部系统控制与信息处理重点实验室)