Colour 0.3.8 is available!

More than 7 months in the making, this release introduces substantial backward incompatible changes:

Spectral computations are adopting practise ASTM E2022–11 and ASTM E308–15 methods to compute tristimulus values from spectral data.

D50 and D65 illuminants chromaticity coordinates have been rounded to 4 decimals to conform better with what most RGB colourspace specifications adopt.

The RGB colourspace transfer functions implementation has been overhauled in order to be easily extended in the future.

SciPy is now a requirement.

Please carefully refer to the releases page Changes section.

Highlights of this release are:

Spectral to tristimulus values computations using ASTM E2022–11 and ASTM E308–15 methods.

Dominant and complementary wavelengths along colour and excitation purity computations.

Support for YCbCr and YcCbcCrc colour encodings.

Support for Hunter Lab and Hunter Rdab colour scales.

Support for BT.1886 EOTF and ST 2084 OETF / EOTF.

Support for RIMM, ROMM and ERIMM colour encodings.

A Jupyter Notebook is available to illustrate the expected computational differences. They should remain orders of magnitude under visual discrimination threshold however they will likely create computational discrepancies.

Colour - Demosaicing and Colour - HDRI packages have been updated accordingly.

Michael and I would like to thanks all the contributors for that release whether they contribute to the code or participate in discussions.

David Bourgeois

Luke Canavan

Sean Cooper

Nick Shaw

Ron024

Kevin Wheatley

Visit the releases page for complete details.