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Description: % May 2010 % This matlab code implements TVL1 based Hybrid Compressive Sensing using LSQR. % Only suitable the small scale data due to the costly storage and computation. % % A - M x N measurement matrix: random sampling alone or hybrid sampling (random sampling and low resolution sampling) % % gamma - weight for L1-norm of the diagonal gradients % % tol - tolerance for stopping criterion. % - DEFAULT 1e-3 if omitted. % % maxIter - maximum number of iterations % - DEFAULT 50, if omitted. %Original TVL1 based Hybrid Compressive Sensing problem: % min ||gx ||_1 + ||gy ||_1 +\gamma *(||gxy ||_1 + ||gyx ||_1) % s.t. A*I = b and I >=0 %It can be solved using PDCO as follows % min c*x s.t. Phi * x =B % x = [I; gx; -gx; gy; -gy; gxy; -gxy; gyx; -gyx] % Phi and B enforce the measurement (A) and constrant among the elements of x; % Xianbiao Shu, May 2010. Questions? xshu2@uiuc.edu; % Copyright: Computer Vision and Robotics Lab, University of Illinois, Urbana-Champaign % Acknowledgement: Primal-Dual interior method for Convex Objectives (PDCO) % http://www.stanford.edu/group/SOL/software/pdco.html
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Author: li123kai@126.com |
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Description: 此算法为用于解反问题的lsqr算法，对Ax=b，输入矩阵A，列向量b，以及迭代步数，求得列向量x-This algorithm is used for solution of the inverse problem lsqr algorithm, Ax = b, the input matrix A, the column vector b, as well as the number of iterative steps, to seek the column vector x
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Size: 2048 |
Author: gongwei |
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Description: 采用CG法求解稀疏不对称的Ax=b-Implementation of a conjugate-gradient type method for solving sparse linear equations and sparse least-squares problems:
Solve Ax = b
or minimize || Ax- b ||2
or minimize || Ax- b ||2+ d2 ||x||2.
The matrix A may be square or rectangular (over-determined or under-determined), and may have any rank. It is represented by a routine for computing Av and A u for given vectors v and u.
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Size: 45056 |
Author: LSQR |
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Description: matlab实现lsqr算法的源码，有强烈的参考价值，可用于地球物理反演。-matlab realize lsqr algorithm source code, there is a strong reference value, can be used for geophysical inversion.
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Size: 6144 |
Author: muyoubaiyu |
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Description: 最小二乘matlab算法，可以直接调用，用于数学算法，稀疏变换，求解等需要用到-
Matlab least squares algorithm, can be called directly for mathematical algorithms, sparse transformation, such as the need to use to solve
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Size: 4096 |
Author: 刘 |
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Description: 可用于求解超大规模线性方程组非负解的MATLAB函数-Given a tall full-rank matrix A, solves the nonnegative least squares
problem: min ||Ax-b|| s.t. x>= 0 and returns the minimizer x. The
argument err is the tolerance used in testing for zeros
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Size: 1024 |
Author: |
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Description: 计算病态线性方程的LSQR算法，MATLAB汇编程序。-LSQR algorithm of morbid linear equations , MATLAB assembler
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Size: 1024 |
Author: 晨之曦 |
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