actionscript

• CleVR Actionscript Library
  blacksea
  Jan 20 2008
  

  These are a collection of classes developed as part of the CleVR Stitcher project (see http://www.clevr.com/blog/air-stitcher/). They include several mathematics and graphics utilities. Currently they include the following:

  ***Matrix Algebra***
  This library provides some classes for linear algebra. It's ported from the NIST's JAMA Java Matrix library.

  It's not a full port - only the classes that we needed for CleVR have been ported, so there are not all the decomposition classes in JAMA. There are also a few methods missing from the RealMatrix class. There are classes for singular value decomposition and QR decomposition.

  The main class is called RealMatrix, so as to not conflict with the Matrix class in AS3.

  ***Bitmap interpolation***
  InterpolatedBitmapData adds support for bicubic and bilinear interpolation to
  the Actionscript BitmapData class.

  It adds two public methods - getPixelBilinear and getPixelBicubic. You can call these with sub-pixel coordinates and it will interpolate the RGB value for that point.

  ***Histogram stretching***
  This class provides simple methods for generating a histogram from an image, and from that creating ColorTransforms and ColorMatrixFilters for doing histogram stretching. These allow you to do things similar to "Auto levels" in Photoshop, or "Enhance" in iPhoto to your BitmapData images.

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