andrewssobral/lrslibrary

Low-Rank and Sparse Tools for Background Modeling and Subtraction in Videos

lrslibrary's Issues

"data_2_days" dataset?

Hi there. I am trying to run the rpca_demo function and can't seem to locate the dataset "data_2_days" that the demo is supposed to process and analyze. Any help locating this dataset would be greatly appreciated. I'd love to be able to play around with the demo script.

Thanks!

Bug in RPCA | RPCA algorithm

When calling 'rob_pca' (line 50 in RPCA.m) the order of the Sigmaf and Sigmai parameters is wrong.
Instead of
rob_pca(Data,number_component,300,1,Sigmaf,Sigmai,2,basis_ini,c_ini,mean_ini);
The code should read
rob_pca(Data,number_component,300,1,Sigmai,Sigmaf,2,basis_ini,c_ini,mean_ini);

The final result is not much different, but the algorithm becomes a lot faster.

svdecon?

I saw the "svdecon" function in several programs.
Is it different from svd(A,'econ')?

The library is difficult to use from outside it's main folder.

I added the main folder on MATLAB path and tried to use process_matrix function from outside. In turn it internally calls commands like:addpath('algorithms/lrr/ALM'); This doesn't work if I am operating from a folder different from the lrslibrary folder. Consequently, I cannot run the algorithms. I bypassed by manually adding paths of the specific algorithms I wanted on MATLAB Path.

Further, adding the lrslibrary folder into MATLAB path is also not very clean. It contains too many scripts whose names may clash with similarly named scripts in other folders.

Basically an installation script is needed.

Output File is too large as compared to input video size.

For input video file of size 3.45 Mb (dataset highway.avi) , the ouput video of L and S is 345 Mb each respectively.
I ran GoDec in RPCA.
Can i reduce the ouput video size without hampering anything ?

some problem in running lrs_gui.m

Hello, I am a graduate student from China.
There are some problems in your repository "lrslibrary". First, the library "vlfeat" is empty. Second, the file "lrs_gui.m" is also empty. Can you fix these problem soon?

lrs_setup错误

lrs_setup
Running setup...
LRSLibrary path: C:\Users\18382\Desktop\experiment\lrslibrary-master\lrslibrary-master
Updating PATH!
Running VLFeat setup!
错误使用 run (line 46)
未找到 C:\Users\18382\Desktop\experiment\lrslibrary-master\lrslibrary-master\libs\vlfeat\toolbox\vl_setup。

出错 lrs_setup (line 61)
run(lrs_conf.vl_path); % add VLFeat

matrix completion usage?

Hey, this is an extremely impressive library in terms of coverage. Can you explain a bit, though, how to use the matrix completion routines? Suppose I have a matrix M that has NaNs where the entries are missing and I want to run PG-RMC: out = run_algorithm('MC', 'PG-RMC', M, good_idxs); yields

06:35:26 Running Matrix Completion with Nearly Optimal Robust matrix Completion (Cherapanamjeri et al. 2016)
Index exceeds matrix dimensions.

Error in spdiags (line 102)
         a((len(k)+1):len(k+1),:) = [i i+d(k) B(i+(m>=n)*d(k),k)];

Error in lanbpro (line 664)
B_k = spdiags([alpha(1:k) [beta(2:k);0]],[0 -1],k,k);

Error in lansvd (line 250)
        [U,B,V,p,ierr,w] = lanbpro(A,Atrans,m,n,j,p,options,U,B,V,anorm);

Error in fastsvd (line 11)
  [U,S,V] = lansvd(myAfunc,myAtfunc, m,n,k,'L');

Error in ncrmc (line 53)
    [U_t, Sig_t, V_t] = fastsvd(U_t, Sig_t, V_t, (1 / p) * (D_t - S_t), r, c, r_hat + 1);

Error in run_mc (line 6)
  [U_t, SV_t] = ncrmc(M, params.Idx);

Error in run_alg (line 7)
L = run_mc(params);

Error in run_algorithm (line 47)
  run_alg;

where the NaNs were replaced by 0's and goodIdxs is a boolean matrix corresponding to whether or not an entry was non-NaN in the original matrix.

How is the function supposed to be used?

data_2_days missing

When I runnung the Matlab code, I can't find the file called data_2_days.
I have searched the internet and I find a website you give a url connection to the original source code and data file, but that url is unavailable now.(https://gofile.io/?c=QIsyrz)
Could you please help me locate the data_2_days? Any help locating this dataset would be greatly appreciated.
Thank you! Regards

Use of '\' as path separator breaks app on UNIX-based operating systems

The string being used to initialize text fields on main_edit_video.fig and main.fig uses the character \ as path separator. Since this is only the path separator on Windows systems, the app demos do not work properly on OS X and Linux (and probably any UNIX-based operating system, where the path separator is /). A fix would be to initialize these fields from code using MATLAB's filesep, or maybe using / as the file separator (I think MATLAB accepts it as a file separator even on Windows).

Hi, when I run this code

Error using lansvd

Hello, I got the error by running the algorithms:

Running Subspace Tracking with Memory Efficient Dynamic Robust PCA (Narayanamurthy and Vaswani, 2017b)
Subspace Tracking with Provable Dynamic Robust PCA or Robust Subspace Tracking (Narayanamurthy and Vaswani, 2017a)
Matrix Completion with Nearly Optimal Robust matrix Completion (Cherapanamjeri et al. 2016)

Error using lansvd (line 159)
K must satisfy  K <= LANMAX <= MIN(M,N).

Error in ncrpca (line 59)
        sig_t = lansvd(M-S_t, true_r, 'L'); % svd function from propack

Error in run_alg (line 21)
L_hat_init = ncrpca(TrainData, rank_init);

Error in run_algorithm (line 86)
  run_alg;

Error in process_video (line 35)
	results = run_algorithm(method_id, algorithm_id, M, params);

Error in main>pushbutton_process_Callback (line 200)
  stats = process_video(method_id,algorithm_id,inputFileName,outputFileName);

Error in gui_mainfcn (line 95)
        feval(varargin{:});

Error in main (line 42)
    gui_mainfcn(gui_State, varargin{:});

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)main('pushbutton_process_Callback',hObject,eventdata,guidata(hObject)) 
Error while evaluating UIControl Callback.

Windows 10 x64, Matlab 2017b