Sparse representations

Dictionary learning (DL) for sparse coding has been widely applied in the field of computer vision. Many DL approaches have been developed recently to solve pattern classification problems and have achieved promising performance. In this paper, to improve the discriminability of the popular dictionary pair learning (DPL) algorithm, we propose a new method called discriminative dictionary pair learning (DDPL) for image classification.

17p nguaconbaynhay11 07-04-2021 10 1   Download

DNA pooling constitutes a cost effective alternative in genome wide association studies. In DNA pooling, equimolar amounts of DNA from different individuals are mixed into one sample and the frequency of each allele in each position is observed in a single genotype experiment.

10p viwyoming2711 16-12-2020 5 0   Download

This paper contributes an efficient denoising method for low-dose CT images. A noisy image is decomposed into three component images of low, medium and high frequency bands; noise is mainly presented in the medium and high component images. Then, by exploiting the fact that a small image patch of the noisy image can be approximated by a linear combination of several elements in a given dictionary of noise-free image patches generated from noise-free images taken at nearly the same position with the noisy image, noise in these medium and high component images are effectively eliminated.

11p trinhthamhodang9 10-12-2020 20 1   Download

Gene Ontology (GO) is a community effort to represent functional features of gene products. GO annotations (GOA) provide functional associations between GO terms and gene products. Due to resources limitation, only a small portion of annotations are manually checked by curators, and the others are electronically inferred.

13p viflorida2711 30-10-2020 9 2   Download

Precise measurement of dielectric loss angle is very important for electric capacity equipment in recent power systems. When signal-to-noise is low and fundamental frequency is fluctuating, aiming at the measuring error of dielectric loss angle based on some recent Fourier transform and wavelet transform harmonics analysis method.

5p vivalletta2711 11-01-2020 11 0   Download

This article firstly discusses the study of satellite image compression based on compression sensing theory. It then optimizes the widely used orthogonal matching pursuit algorithm in order to make it fits for satellite image processing.

8p vivalletta2711 11-01-2020 13 0   Download

This paper proposes an accurate, computationally efficient, and spectrum-free formulation of the heat diffusion smoothing on 3D shapes, represented as triangle meshes. The idea behind our approach is to apply a ðr;rÞ-degree Pade´–Chebyshev rational approximation to the solution of the heat diffusion equation. The proposed formulation is equivalent to solve r sparse, symmetric linear systems, is free of user-defined parameters, and is robust to surface discretization.

7p trinhthamhodang1 16-11-2019 25 2   Download

In order to treat high-dimensional problems, one has to find data-sparse representations. Starting with a six-dimensional problem, we first introduce the low-rank approximation of matrices. One purpose is the reduction of memory requirements, another advantage is that now vector operations instead of matrix operations can be applied.

24p viryucha2711 24-04-2019 16 1   Download

Recently, there has been a rise of interest in unsupervised detection of highlevel semantic relations involving complex units, such as phrases and whole sentences. Typically such approaches are faced with two main obstacles: data sparseness and correctly generalizing from the examples. In this work, we describe the Clustered Clause representation, which utilizes information-based clustering and inter-sentence dependencies to create a simplified and generalized representation of the grammatical clause. ...

8p hongvang_1 16-04-2013 73 1   Download

We illustrate and explain problems of n-grams-based machine translation (MT) metrics (e.g. BLEU) when applied to morphologically rich languages such as Czech. A novel metric SemPOS based on the deep-syntactic representation of the sentence tackles the issue and retains the performance for translation to English as well.

6p hongdo_1 12-04-2013 48 3   Download

We live in a time when digital information plays a key role in various fields. Whether we look towards communications, industry, medicine, scientific research or entertainment, we find digital images to be heavily employed. The high volume of stored and transacted digital images, together with the increasing availability of advanced digital image acquisition and display techniques and devices, came with a growing need for novel, fast and intelligent algorithms for the digital manipulation of digital images....

0p cucdai_1 14-10-2012 59 5   Download

We live in a time when digital information plays a key role in various fields. Whether we look towards communications, industry, medicine, scientific research or entertainment, we find digital images to be heavily employed. The high volume of stored and transacted digital images, together with the increasing availability of advanced digital image acquisition and display techniques and devices, came with a growing need for novel, fast and intelligent algorithms for the digital manipulation of digital images....

208p greengrass304 15-09-2012 97 15   Download

This textbook introduces sparse and redundant representations with a focus on applications in signal and image processing. The theoretical and numerical foundations are tackled before the applications are discussed. Mathematical modeling for signal sources is discussed along with how to use the proper model for tasks such as denoising, restoration, separation, interpolation and extrapolation, compression, sampling, analysis and synthesis, detection, recognition, and more. The presentation is elegant and engaging.

48p kennybibo 10-07-2012 91 24   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Sparse Representations Are Most Likely to Be the Sparsest Possible

12p dauphong20 11-03-2012 42 5   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Texture Classification Using Sparse Frame-Based Representations

11p dauphong20 10-03-2012 36 6   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Auditory Sparse Representation for Robust Speaker Recognition Based on Tensor Structure

9p sting09 21-02-2012 39 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: SSIM-inspired image restoration using sparse representation

34p dauphong15 18-02-2012 45 4   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Parameter estimation for SAR micromotion target based on sparse signal representation

30p dauphong15 18-02-2012 48 4   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Review Article Construction of Sparse Representations of Perfect Polyphase Sequences in Zak Space with

14p dauphong14 11-02-2012 51 3   Download

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài :Hyperspectral imagery super-resolution by sparse representation and spectral regularization

10p dauphong11 06-02-2012 64 7   Download