Results 11 to 20 of about 66,358 (264)
ETFT: Equiangular Tight Frame Transformer for Imbalanced Semantic Segmentation [PDF]
SensorsSemantic segmentation often suffers from class imbalance, where the label ratio for each class in the dataset is not uniform. Recent studies have addressed the issue of class imbalance in semantic segmentation by leveraging the neural collapse phenomenon
Seonggyun Jeong, Yong Seok Heo
doaj +2 more sources
A Brief Survey of the Graph Wavelet Frame
Complexity, 2022 In recent years, the research of wavelet frames on the graph has become a hot topic in harmonic analysis. In this paper, we mainly introduce the relevant knowledge of the wavelet frames on the graph, including relevant concepts, construction methods, and
Jie Zhou, Zeze Zhang
doaj +1 more source
Stable Sparse Model with Non-Tight Frame
Applied Sciences, 2020 Overcomplete representation is attracting interest in image restoration due to its potential to generate sparse representations of signals. However, the problem of seeking sparse representation must be unstable in the presence of noise.
Min Zhang, Yunhui Shi, Na Qi, Baocai Yin
doaj +1 more source
Regularity properties of Haar Frames
Comptes Rendus. Mathématique, 2021 We prove that pointwise and global Hölder regularity can be characterized using the coefficients on the Haar tight frame obtained by using a finite union of shifted Haar bases, despite the fact that the elements composing the frame are discontinuous.
Jaffard, Stéphane, Krim, Hamid
doaj +1 more source
Hadamard equiangular tight frames
Applied and Computational Harmonic Analysis, 2021 An equiangular tight frame (ETF) is a type of optimal packing of lines in Euclidean space. They are often represented as the columns of a short, fat matrix. In certain applications we want this matrix to be flat, that is, have the property that all of its entries have modulus one.
Matthew Fickus +3 more
openaire +4 more sources
Mutually Unbiased Equiangular Tight Frames [PDF]
IEEE Transactions on Information Theory, 2021 An equiangular tight frame (ETF) yields a type of optimal packing of lines in a Euclidean space. ETFs seem to be rare, and all known infinite families of them arise from some type of combinatorial design. In this paper, we introduce a new method for constructing ETFs.
Matthew Fickus, Benjamin R. Mayo
openaire +2 more sources
Lapped Tight Frame Transforms [PDF]
2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007 We propose a new class of equal-norm tight frames termed lapped tight frame transforms (LTFTs). These can be seen as a redundant counterpart to bases known as lapped orthogonal transforms (LOTs) introduced by Malvar and Cassereau, as well as an infinite-dimensional counterpart to harmonic tight frames (HTFs).
Amina Chebira, Jelena Kovacevic
openaire +1 more source
On the Search for Tight Frames of Low Coherence [PDF]
Journal of Fourier Analysis and Applications, 2020 26 ...
Xuemei Chen +2 more
openaire +3 more sources
Analysis
IEEE Access, 2019 Recently, the L1/2 regularization has shown its great potential to eliminate the bias problems caused by the convex L1 regularization in many compressive sensing (CS) tasks.
Lianjun Yuan +5 more
doaj +1 more source
Tremain equiangular tight frames [PDF]
Journal of Combinatorial Theory, Series A, 2018 11 ...
Matthew Fickus +3 more
openaire +2 more sources