matlab图像特效代码临床光声成像的卓越光声非负重建 该存储库包含用于使用快速高级共轭梯度算法从原始RF数据重建光声图像的MATLAB代码示例。 结果发表在我们的论文《用于临床光声成像的高级光声非负重建(SPANNER)》中。 该代码免费提供给所有人使用。 如果您正在发布使用此代码或其变体的任何作品,请记住它是免费获得的。 我们恳请您在出版物中引用我们的论文。 该代码按“原样”提供,没有任何明示或暗示的保证,包括但不限于对适销性或特定用途的隐含保证或条件。 在任何情况下,作者和/或斯坦福大学均不对任何种类的任何特殊,偶发,间接或继发的损害赔偿负责,无论是由于使用,数据或利润的损失,无论作者是否提出建议有关此类损害的可能性,和/或由于使用或执行本规范而引起的任何责任理论。 MATLAB是The MathWorks,Inc.的商标。本文档和网站中提及的其他公司和/或组织的商标仅是出于标识目的,并且是其各自公司和/或组织的财产。 接触: 请与Idan Steinberg博士()联系,以获取与此代码有关的查询。 抽象的: 光声(PA)成像可以通过增加分子信息来革新医学超声。 然而,由于有限的
2022-07-01 09:04:33 20KB 系统开源
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K-SVD是一种经典的字典训练算法,依据误差最小原则,对误差项进行SVD分解,选择使误差最小的分解项作为更新的字典原子和对应的原子系数,经过不断的迭代从而得到优化的解。
2022-05-05 19:13:30 321KB ksvd 稀疏表示
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MahNMF Manhattan Non-negative Matrix Factorization code % Manhattan Non-negative Matrix Factorization. % ManhNMF: Matlab Code for Efficient Robust Manhattan NMF Solver % Reference % [1] N. Guan, D. Tao, Z. Luo, and J. Shawe-taylor, "MahNMF: Manhattan % Non-negative Matrix Factorization," arXiv:1207.3438v1, 2012. % [2] N. Guan, D. Tao, Z. Luo, and J. Shawe-taylor, "MahNMF: Manhattan % Non-negative Matrix Factorization," Submitted to Journal of Machine Learning Research, 2013. % The model is X \approx W^TH, where X, W, and H are defined as follows: % X (m x n): data matrix including n samples in m-dimensional space; % W (r x m): basis matrix including r bases in m-dimensional space; % H (r x n): coefficients matrix includeing n encodings in r-dimensional space. % Written by Naiyang Guan (ny.guan@gmail.com) % Copyright 2012-2014 by Naiyang Guan and Dacheng Tao % Modified at Jan. 28 2013 % % X : Input data matrix (m x n) % r : Target low-rank % % (Below are optional arguments: can be set by providing name-value pairs) % MAX_ITER : Maximum number of iterations. Default is 1,000. % MIN_ITER : Minimum number of iterations. Default is 10. % MAX_TIME : Maximum amount of time in seconds. Default is 100,000. % W_INIT : (m x r) initial value for W. % H_INIT : (r x n) initial value for H. % LAM_INIT : initial value of smoothness parameter. Default is 1. % MDL_TYPE : Model type (Default is 'PLAIN'), % 'PLAIN' - MahNMF (min{||X-W^T*H||_1,s.t.,W >= 0 and H >= 0}.), % 'BXC' - Box Constrained MahNMF (min{||X-W^T*H||_1,s.t.,1 >= W >= 0 and 1 >= H >= 0}.), % 'MNR' - Manifold Regularized MahNMF % (min{||X-W^T*H||_1+.5*beta*TR(H*Lp*H^T),s.t.,W >= 0 and H >= 0}.), % 'GSP' - Group Sparse MahNMF % (min{||X-W^T*H||_1+.5*beta*\sum_{g\in G}||W^[g]||_{1,p},s.t.,W >= 0 and H >= 0}.), % 'SYM' - Symmetric MahNMF (min{||X-H*H^T||_1,s.t., H >= 0}.). % ALG_TYPE : Algorithm type (Default is 'AGD'), % 'AGD' - Accelerated Gradient Descent, % 'RRI' - Rank-one Residue Iteration. % BETA : Tradeoff parameter over regularization term. Default is 1e-3. % SIM_MTX : Similarity matrix constructed by 'constructW'. % GPP_MTX : Group pattern for boundary of all groups. % TOL_INNR : Stopping tolerance of inner iterations. Default is 1e-2. % TOL_OUTR : Stopping tolerance of outer iterations. Default is 1e-3. % If you want to obtain a more accurate solution, decrease TOL_INNR or TOL_OUTR and increase MAX_ITER at the same time. % VB_OUTR : 0 (default) - No debugging information is collected. % 1 (debugging purpose) - History of computation is returned by 'HIS' variable. % 2 (debugging purpose) - History of computation is additionally printed on screen. % VB_INNR : 0 (default) - No debugging information is collected. % 1 (debugging purpose) - History of computation is returned by 'HIS' variable. % 2 (debugging purpose) - History of computation is additionally printed on screen. % % W : Obtained basis matrix (r x m). % H : Obtained coefficients matrix (r x n). % iter : Number of iterations. % elapse : CPU time in seconds. % HIS : (debugging purpose) History of computation, % niter - total iteration number spent for Nesterov's optimal % gradient method, % cpus - CPU seconds at iteration rounds, % objf - objective function values at iteration rounds, % dlta - stopping criteria of block coordinate descent. % % % >>X=rand(1000,500); % >>ManhNMF(X,10); % >>ManhNMF(X,20,'verbose',1); % >>ManhNMF(X,30,'verbose',2,'w_init',rand(r,m)); % >>ManhNMF(X,5,'verbose',2,'tol_outr',1e-5); % Note: other files 'GetStopCriterion.m', 'ApproxFunC.m', and 'wmedianf.mexw32' should be included under the same % directory as this code.
2022-03-23 20:35:03 29KB MahNMF MahNMF code
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非负矩阵分解(NMF)被证明是一种非常有效的分解方法,可用于数据分析中的降维,并且已广泛应用于计算机视觉,模式识别和信息检索中。 但是,NMF实际上是一种不受监督的方法,因为它无法利用有关数据的先验知识。 在本文中,我们提出了使用图拉普拉斯算子(CNMF-GL)进行约束的非负矩阵分解,该方法不仅利用了几何信息,而且还适当地使用了标签信息来增强NMF。 具体来说,我们期望图的正则化项能够保留原始数据的局部结构,同时具有相同标签和具有不同标签的数据点将具有相应的约束条件。 结果,学习的表示将具有更大的辨别力。 图像聚类的实验结果证明了该算法的有效性。
2022-02-27 19:53:22 282KB Non-negative matrix factorization ·
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Algorithms for Non-negative Matrix Factorization
2022-01-17 16:00:19 1.07MB NMF
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Algorithms for Non-negative Matrix论文描述希望帮助到大家
2021-05-13 16:46:52 894KB Algorithms for Non-negative Matrix
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