SPy 0.23.1

Release date: 2022.10.02

Bug Fixes

• [#143] Eigen{values,vectors} in a GaussianStats weren't sorted in descending order, which is inconsistent with PrincipalComponents.
• [#144] SpyFile.load was failing on Windows because numpy versions there did not support complex256.
• [#145] unmix was failing, due to an invalid reference to "np.inv"

SPy 0.23

Release date: 2022.09.09

Changes

• calc_stats and mean_cov produce consistent results for 2D input
• [#135] Complex data types in ENVI files are not converted to scalars

Bug Fixes

• [#142] Fixed incorrect outer window mean for rx, ace, and matched_filter
• [#136, #140] Avoid deprecation warnings

SPy 0.22.4

Release date: 2021.10.05

Bug Fixes

• [#3] Using np.int8 for spy_colors caused invalid (negative) color values

SPy 0.22.3

Release date: 2021.10.01

Bug Fixes

• [#127] Use any instead of not for sequence logic
• [#123,#124] Fixed Matplotlib deprecation warnings
• [#130] Fix deprecation warnings caused by np.int and np.float
• Fixed several missing imports leftover from code refactoring

SPy 0.22.2

Release date: 2021.03.31

Bug Fixes

• [#118] Avoid Matplotlib deprecation warning.

Release date: 2020.08.02

Bug Fixes

• Spectral database unit test files were not included with package files

Release date: 2020.08.01

New Features (thanks to @kormang)

• Continuum computation and removal

  • See functions spectral_continuum, remove_continuum, continuum_points

• Support for USGS spectral library (spectral.USGSDatabase)

• SMACC algorithm for endmember extraction (spectral.algorithms.smacc)

Bug Fixes

• [Issue #113] orthogonalize was broken in release 0.21.

Spectral Python (SPy) 0.21

Release date: 2020.04.26

Changes

• As of version 0.21, Spectral Python (SPy) is released uder the MIT License.

• Switched most console print statements to logging statements for finer control of module output.

• Cleaned up a lot of code to put imports at module (file) level.

Bug Fixes

• [Issue #99] matplotlib's "cmap" keyword now works again with spy.imshow.

• [Issue #102] Creating a SpectralLibrary no longer fails when some optional band parameters are not provided.

Spectral Python 0.20

Release date: 2019.10.06

New Features

• Support for ECOSTRESS spectral library (supercedes ASTER library).

• Accept "mask" and "bg" keywords in imshow and get_rgb (affects color scaling).

• Denoising methods added to PrincipalComponents (issue #91) added by @gemmaellen.

• Added "raw" to list of checked ENVI data file extensions.

Changes

• Increase speed of spectral_angles computation by ~30x using einsum.

• Eliminate tostring deprecation warnings by migrating to tobytes.

Bug Fixes

• Support parsing ENV bbl values as floats (issue #67).

• Removed "scale" keyword to handle TransformedImage objects in envi.save_image (issue #83).

New Features

• Rendering functions accept an "ignore" keyword to indicate a bad data value that will be ignored when calculating color histogram stretches.

• Added iterator_ij to iterate over all pixel coordinates for a given image mask.

• Added expand_binary_mask_for_window to expand an image mask to include all pixels within a fixed size window around each masked pixel.

• Added support for bad band lists (bbl) in ENVI headers and suppress display of bad bands in spectral plots

• Added optional support for non-lowercase ENVI header parameter names (issue #63).

Changes

• principal_components also accepts a GaussianStats object, which can avoid the need to recompute image/class statistics.

• Added a SpyException base class for package-specific exceptions.

• Added "raw" to the list of checked ENVI image data file extensions.

Bug Fixes

• Fixed a bug that potentially produced incorrect results in map_class_ids (issue #53).

• Removed unecessary import that cause python3 compatibility error in aviris.open (issue #54).

• Removed has_key call breaking python3 compatibility (issue #56).