Comments and Ratings

Thanks for your nice toolbox.

Hi,

Thanks a lot for this toolbox. Is it possible to access the details (D) in a translation-invariant wavelet transform (TIWT)?
So that, for example, for a TIWT of depth 3:
signal = D1 + D2 + D3 + A3?

I had a look at the code but could not figure out how to do it.

Thanks a lot!

Amardeep

Very useful
compute_curvature will generate an error on line 75 ("dp = sum( normal(:,E(:,1)) .* normal(:,E(:,2)), 1 );") for SOME surfaces.
what's the solution of this bug
thanks

Thanks for your sharing.

Thanks for your sharing.

Merci beaucoup Peyre for sharing et aussi pour superbe site avec many explanations.

Very useful.

But I have a question: when I tried to use the function "perform_mesh_simplification" to make the simplificatino for mesh. Matlab said that QSlim is not a command. And here is the command where situates the problem: "system(['QSlim tmp.smf -o tmp1.smf -s ' num2str(nface)]);"

I'm afraid this is because the qslim.exe was missed?

thanks for your explaination!

Very useful.
Is there a Matlab 2008b version ?

Works fine for me. Thank you very much.

Cool!!!

perform_image_extension(M,m) is used in the function [M1,MW,MW1] = perform_wavelet_matching(M1,M,options),but my running error is "Synthesizing corral, ave=1, T=inf.
??? Undefined function or method 'perform_image_extension' for input arguments of type
'double'.

Error in ==> perform_wavelet_matching at 80
M = perform_image_extension(M,m);

Error in ==> test_nl_synthesis at 216
    M = perform_wavelet_matching(M,Ma,options);"
How can I get the function missed here? Please help me ,thank you!

Very useful, except for a bug in the compute_curvature function:

compute_curvature will generate an error on line 75 ("dp = sum( normal(:,E(:,1)) .* normal(:,E(:,2)), 1 );") for SOME surfaces. The error stems from E containing indices that are out of range which is caused by line 48 ("A = sparse(double(i),double(j),s,n,n);") where A's values eventually entirely make up the E matrix. The problem occurs when the i and j vectors create the same ordered pair twice in which case the sparse function adds the two s vector elements together for that matrix location resulting in a value that is too large to be used as an index on line 75. For example, if i = [1 1] and j = [2 2] and s = [3 4] then A(1,2) will equal 3 + 4 = 7.

The i and j vectors are created here:
i = [face(1,:) face(2,:) face(3,:)];
j = [face(2,:) face(3,:) face(1,:)];

The fact that your code seems to depend on the order of the vertices in the faces matrix worries me because the curvature should be the same regardless of the order, obviously. To be fair, I don't completely understand how your code works so perhaps the way it is written it works out to not matter except that it does certainly matter when it results in an index out of bounds error as previously described.

Really versatile and quite comprehensive wavelet toolbox. People should use this before deciding whether they need to spend out on TMW's own Wavelet toolbox.

Beginners may wish to know that they need to compile the MEX files before using the toolbox - add the toolbox to Matlab's search path, navigate to the toolbox's main directory, and type
>> compile_mex
into the command line.

There are a couple of issues with the installation; until Gabriel updates the ZIP file, the Atrou source files and the JPEG2000 source files are missing. To get compile_mex.m to work, then, you'll need to comment out lines 8 through to 58.

The help files are pretty good (certainly better than those for the other wavelet toolboxes here on the FEX) although it would be nice to have example usages for each of the functions, and perhaps one or two lines on suggested application for the different types of transform.

Thanks Gabriel :)

i am unable to find the matlab function 'perform_arithmetic_coding'. can you help me out ?

Thank you very much.

There are some file lost in you code.Please give a whole code.

I downloaded, installed and ran without any problems on Matlab 7 on Linux. Thank you for uploading this and for the convenient test programs.

I downloaded it but don't know how to use it. When I run the function perform_wavelet_transform, an error message like:"Undefined function or variable "dps"."
occurs. How can I handle it?

very useful

Requiero teoria de Wavelet

Thank you very much for your sharing.
But when I test in 3D,it warns errors:
:
--> Perform Fast Marching ... ??? Error using ==> perform_front_propagation_3d
end_points must be of size 3 x nb_end_poins.

Error in ==> perform_fast_marching at 121
    [D,S,Q] = perform_front_propagation_3d(W,start_points-1,end_points-1,nb_iter_max, H, L,
    values);

Error in ==> test_vol3d at 61
[D,S] = perform_fast_marching(W, start_point, options);

??? Error using ==> perform_front_propagation_3d
end_points must be of size 3 x nb_end_poins.

Error in ==> perform_fast_marching at 121
    [D,S,Q] = perform_front_propagation_3d(W,start_points-1,end_points-1,nb_iter_max, H, L,
    values);

Error in ==> test_fast_marching_3d at 19
[D,S] = perform_fast_marching(W, start_points, options);

Who can tell me how to solve the problems?