https://github.com/mikolalysenko/rle-stencils

Stencil generator code for the rle libraries
https://github.com/mikolalysenko/rle-stencils

Last synced: about 2 months ago
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Stencil generator code for the rle libraries

• Host: GitHub
• URL: https://github.com/mikolalysenko/rle-stencils
• Owner: mikolalysenko
• Created: 2013-01-14T18:00:18.000Z (almost 12 years ago)
• Default Branch: master
• Last Pushed: 2014-05-27T21:30:48.000Z (over 10 years ago)
• Last Synced: 2024-10-25T15:36:18.840Z (2 months ago)
• Language: JavaScript
• Size: 157 KB
• Stars: 4
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
rle-stencils

============

Code to generate stencils for the [rle level set processing libraries](https://github.com/mikolalysenko/rle-all).

Basic Usage

===========

To install the library, just do:

    npm install rle-stencils

    

Then in your code you can import the stencil generators using:

    var stencils = require('rle-stencils');

Example: Moore

--------------

Here is how to create a stencil for a [Moore neighborhood](http://en.wikipedia.org/wiki/Moore_neighborhood) with radius 2:

    var moore_neighborhood = stencils.moore(2);

    

Example: von Neumann

--------------------

And here is the same idea applied to a [von Neumann neighborhood](http://en.wikipedia.org/wiki/Von_Neumann_neighborhood)

    var von_eumann_neighborhood = stencils.vonNeumann(1);

Example: Sphere

---------------

    var ball_neighborhood = stencils.ball(5);

Example: L^p

------------

More generally, you can create a stencil for any [Lp ball](http://en.wikipedia.org/wiki/Lp_space), with p being some fixed power.  For example, here is how to make an L^3 ball with radius 6:

    var cubic_neighborhood = stencils.lp(3, 6);

    

In general, calls to `lp(p, r)` return the collection of all integer lattice points `x` satisfying the inequality:

    Math.pow(Math.abs(x[0]), p) + Math.pow(Math.abs(x[1]), p) + Math.pow(Math.abs(x[2]), p) <= Math.pow(r, p)

Acknowledgements

================

(c) 2013 Mikola Lysenko.  MIT License