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Code Listing by Dirk-Jan Kroon

Code 41-46 of 46   Pages: Go to  << Prior  1  2  3  4  5  page  






This function NLMF performs Non-Local Means noise filtering of 1D signal, 2D grey/color or 3D image data. The function is partly c-coded for cpu efficient filtering. Suitable for almost every image data type such as MRI, CT and normal photos.

Warning !, Image filtering removes noise, but important (medical) details can also be lost, (see discussion in comments).

Principle NL-Mean filter:
A local pixel region...



This function SEPARATEKERNEL will separate ( do decomposition of ) any
2D, 3D or nD kernel into 1D kernels. Of course only a sub-set of Kernels
are separable such as a Gaussian Kernel, but it will give approximations for non-separable...



This function MESH2TETRA converts a triangulated surface mesh into a tetrahedron volume mesh.

Main advantage above existing constrained 3D Delaunay is that it
will never add new boundary points, (useful for active appearance...



This function generates a hash value from a text string

hash=string2hash(str,type);

inputs,
str : The text string, or array with text strings.
outputs,
hash : The hash value, integer value between 0 and...



This simple function use three points as input which can be 2D,3D...nD. And will calculate the area and angles of this triangle / polygon.

The last version also support the precise 'Orthogonal-triangular decomposition' area calculation...



This function calculates the principal curvature directions and values
of a triangulated mesh.

The function first rotates the data so the normal of the current
vertex becomes [-1 0 0], so we can describe the data by XY...