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===============================================================================
Installation Instructions
================================================================================

To install SPy, unpack the source distribution archive, `cd` into the directory
created when the archive is unpacked (e.g., "spectral.x.y"), and type
the following::

    python setup.py install


================================================================================
SPy 0.9
================================================================================
Release date: 2013.03.23

- New Features

  - Added a linear target detector (MatchedFilter).

  - Added a class for linear transformations (LinearTransform).

- Changes

  - `principal_components` function now returns a object, which contains return
     values previously in a tuple, , as well as the associated linear transform,
     and a `reduce` method.
  
  - `linear_discriminant` function now returns an object, which contains return
    values previously in a tuple, as well as the associated linear transform.
  
  - Covariance calculation is now performed using 64-bit floats.

- Bug Fixes

  - Fixed a bug causing `ndwindow` to fail when no class mask is passed as a
    keyword arg.

================================================================================
SPy 0.8 Release Notes
================================================================================
Release date: 2012.07.15

- New Features

  - The :func:`~spectral.graphics.ndwindow.ndwindow` function enables viewing of
    high-dimensional images in a 3D display. See :ref:`nd_displays` for details.

- Changes

  - Hypercube display now uses mouse control for pan/zoom/rotate.

- Bug Fixes

  - Fixed a bug in several deprecation warnings that caused infinte recursion.

  - Fixed mismatch in parameter names in kmeans_ndarray.

================================================================================
SPy 0.7 Release Notes
================================================================================
Release date: 2012.02.19

- Changes

  - Changed many function/method names to be more consistent with external
    packages.  Use of most old names will generate a deprecation warning but
    some will require immediate changes to client code.

  - :func:`spectral.kmeans` runs about 10 times faster now for loaded images.


- Bug Fixes

  - The Erdas LAN file interface was modified because the previous reference
    file had mixed endian between header and data sections.  If you are using
    the old sample file "92AV3C", then start using the "92AV3C.lan" file
    available on the web site (see Intro section of the user's guide). This file
    has consistent endian-ness between header and image data sections

  - Fixed a few bugs that potentially caused problems with the BIP and BSQ file
    interfaces.  The specific methods fixed are:
    
    * BipFile.read_bands
    * BsqFile.read_subregion
    * BsqFile.read_subimage
 

================================================================================
SPy 0.6 Release Notes
================================================================================
Release date: 2011.01.17

- New Features:

  - Support for parsing & loading spectra from the ASTER Spectral Library.
  
  - Ability to save ENVI spectral library files.

  - :meth:`spectral.kmeans` will accept a :exc:`KeyboardInterrupt` exception
    (i.e., CTRL-C) and return the results as of the previous iteration.

  - Documention is now online via Sphinx.

- Changes

  - Major changes to module/sub-module layout. Biggest change is that the top-
    level module is now "spectral" instead of "Spectra" (capitalization). Many
    functions/classes have moved between files and sub-modules but that should
    be transparent to most users since the most obvious names are automatically
    imported into the top-level module namespace.

  - Additional ENVI data file extensions are now searched (.bil, .bsq, .bip,)

  - Changed default colors in :obj:`spectral.spyColors`, which is the default
    color palette used by :meth:`spectral.viewIndexed`.

  - :meth:`spectral.transformImage` is now the means to apply a linear transform
    to an image (rather than creating a :class:`spectral.TransformedImage`
    directly) because it handles both :class:`spectral.SpyFile` and
    :class:`numpy.ndarray` objects.

  - 64-bit floats are now used for covariance matrices.

  - Changed SPECTRAL_DATA path delimiter from semi-colon to colon.
    
- Bug fixes

  - Fixed a bug preventing successful reading of ENVI header files where an
    equal ("=") symbol appears in a parameter value.

  - Fixed bug where a ColorScale might return an incorrect color if the scale
    contained negative values.

  - :meth:`cluster` would fail if only 2 clusters were requested.
  
  - :meth:`kmeans` was reporting an incorrect number of pixels reassigned
    between iterations (did not affect final convergence).

  - :meth:`logDeterminant` was crashing when receiving negative values.
  
  - Missing a potential byte swap in :meth:`spectral.io.bilfileBilFile.readDatum`.
Source: README.txt, updated 2013-01-23