Generate Gaussian or Laplacian pyramids, or reconstruct an image from a pyramid. Contains a demo script doing image blending using pyramids. The function is more convenient to use than the Matlab function impyramid.
The code computes the exact eigenpairs of (1-3)D negative Laplacian on a rectangular finite-difference grid for combinations of Dirichlet, Neumann, and Periodic boundary conditions using explicit formulas from
MESH_LAPLACIAN: Laplacian of irregular triangular mesh
Useage: [lap,edge] = mesh_laplacian(vertex,face)
Returns 'lap', the Laplacian (2nd spatial derivative) of an irregular triangular mesh, and 'edge', the linear distances...
function y = laprnd(m, n, mu, sigma)
%LAPRND generate i.i.d. laplacian random number drawn from laplacian distribution
% with mean mu and standard deviation sigma.
% mu : mean
% sigma : standard deviation
% [m, n] : the...
An FEM solution for Laplacian in a bounded region
<!--dp_youtube_begin:http://www.youtube.com/watch?v=5Y12oz22yds--><object width="425" height="344"><param name="movie"...
Demo techniques of nonlinear eigenmaps for the purpose of recovering low-dimensional geometries.
Using manifold learning techniques (aka diffusion maps, Laplacian eigenmaps, intrinsic Fourier analysis) this file recovers the true,...
Subspace learning based face recognition methods have attracted many researchersd-deOao interests in recent years. In this
paper, a novel Laplacian Smoothing Transform (LST) is proposed to transform an image into a sequence, by which low...
The different low dimensional embeddings are an orthonormal coordinate system generated from a
1. Diffusion process defined on the data
2 . Normalized Laplace Beltrami operator
3. Normalized Focker Plank operator
Given a continuous-time system with parameters, can we find the range (or intervals) of the parameters where the system is stable?
When the system model is written with the Laplacian transform, the question is equivalent to finding all...
Global tsunami can be started with asteroid impact or earthquake or thermonuclear bomb. It simulated with 2d wave equation. It is wave equation on sphere surface. Land influence neglected. triangular mesh used. The method is some kind of finite...
not getting results for 4 level/nlevel gaussian pyramid please try for improvement but gray levels are identified for successive levels and code is working well
unable to watch images for intermediate levels
This code implements two variations of the paper
"High accuracy optic flow using a theory for warping" presented at ECCV 2004 by Dr. Thomas Brox.
Its variants appeared in "Particle Video"
presented at CVPR...
udeconv - Unsupervised Wiener-Hunt deconvolution
[xEap, gnChain, gxChain] = udeconv(data, ir, reg, criterion, burnin, maxIter)
return the deconvolution of 'data' by 'ir' with the 'reg' regularization operator. The algorithm...
The gaussian filter used in image processing for noise filtering.
the second derivate of the filter used in image processing operator LOG laplacian of gaussian this is second derivate of gaussina this used for edge detection and also...
NDGAUSS: create ND gaussian kernel in any derivative order.
g = ndgauss(hsize,sigma);
[g,xi,yi,..] = ndgauss(hsize,sigma);
- hsize is N-length of kernel size.
- sigma is N-length of standard...
This function smooths a triangulated Mesh / Patch.
Supports accurate curvature flow smoothing. Which smooths in the direction of the normal keeping the edge ratio's the same.
Also supports Laplacian smoothing with inverse...