Colour 0.3.15

Colour 0.3.15 - Alpha Milestone

This is mainly a maintenance release implementing support for Python 3.8, Numpy 1.18 and fixing a major issue in Krystek (1985) correlated colour temperature computation.

Features

colour.colorimetry

• The typical CIE LED illuminants spectral power distributions and chromaticity coordinates have been added to the datasets: (@KelSolaar)
  • LED-B1
  • LED-B2
  • LED-B3
  • LED-B4
  • LED-B5
  • LED-BH1,
  • LED-RGB1
  • LED-V1
  • LED-V2
• The recommended indoor illuminants ID65 and ID50 spectral power distributions and chromaticity coordinates have been added to the datasets. (@KelSolaar)
• Add colour.colorimetry.sds_and_multi_sds_to_multi_sds definition that converts given spectral and multi-spectral distributions to multi-spectral distributions. (@KelSolaar)

colour.models

• Implement support for Display P3 RGB colourspace as per https://developer.apple.com/documentation/coregraphics/cgcolorspace/1408916-displayp3#discussion. (@sobotka)
• Add colour.models.Jab_to_JCh and colour.models.JCh_to_Jab definitions. (@KelSolaar)

Fixes

colour

Various fixes have been implemented to ensure compatibility with Python 3.8 and Numpy 1.18. (@KelSolaar, @MaxSchambach, @mzszym)

colour.io

• Prevent spi3d LUT index duplicates because of floating point precision related issues. (@KelSolaar, @sobotka, @nick-shaw)

colour.notation

• Fix incorrect Domain-Range scale in Munsell Renotation System implementation. (@KelSolaar)

colour.temperature

• colour.temperature.CCT_to_uv_Krystek1985 definition was incorrectly implemented. Incorrect reading of the reference publications ended up with exponentiations being different, e.g. 10**4 was replaced with 10e4. (@OlliNiemitalo)

Changes

colour.algebra

• colour.algebra.cartesian_to_spherical and colour.algebra.spherical_to_cartesian use ISO conversion convention. ρ is in range [0, +inf], θ is in range [0, pi] radians, i.e. [0, 180] degrees, and φ is in range [-pi, pi] radians, i.e. [-180, 180] degrees.

colour.volume

• colour.is_within_visible_spectrum: (@KelSolaar)
  • Signature: XYZ_outer_surface(XYZ, cmfs=STANDARD_OBSERVERS_CMFS['CIE 1931 2 Degree Standard Observer'].clone().align(DEFAULT_SPECTRAL_SHAPE_XYZ_OUTER_SURFACE), illuminant=sd_ones(DEFAULT_SPECTRAL_SHAPE_XYZ_OUTER_SURFACE), tolerance=None, **kwargs)
• colour.volume.XYZ_outer_surface: (@KelSolaar)
  • Signature: XYZ_outer_surface(cmfs=STANDARD_OBSERVERS_CMFS['CIE 1931 2 Degree Standard Observer'].clone().align(DEFAULT_SPECTRAL_SHAPE_XYZ_OUTER_SURFACE), illuminant=sd_ones(DEFAULT_SPECTRAL_SHAPE_XYZ_OUTER_SURFACE), **kwargs)
  • Implementation: The generated CIE XYZ tristimulus values are not normalised anymore, this will only affect computation if a different illuminant than CIE Illuminant E is chosen.

colour.plotting

• colour.plotting.common.wrap_title: (@KelSolaar)
  • Remove