Luxpy Versions Save

Updated cct.py, added a standalone robertson1968 (with 2022 update to deal with slope-change of iso-temperature lines: see upcoming paper on this).

Updated cct.py based on speed and accuracy analysis (see forthcoming paper)

Same as v1.9.2: updated, faster CCT conversion methods + moved the import of the imageio freeimage plugin inside the save_texture function until support is restored by imageio developers. This plugin is required for saving 16-bit PNG images, but until then, one could try saving them manually using opencv, openexr or PIL.

Major update to cct.py (old function can still be found in cct_legacy.py). Even faster implementations + new methods. (brute-force search is not implemented in new module as some of the other methods can be faster and more accurate). Note that compared to v1.9.1 lot of lut generation functions and the way lut's can be represented as tuples has changed (leading to faster excecution).

Major update to cct.py (old function can still be found in cct_legacy.py). Faster implementations + new methods. (brute-force search is not implemented in new module as some of the other methods can be faster and more accurate). Some updates and small extensions to v1.9.0 and some bug fixes.

Updated cie_interp to follow CIE15:2018 and CIE167:2005 regarding interpolation and extrapolation. Added functions for TM30-20 (basically a copy of TM30-18). Added f1' and spectral mismatch correction factor functions in a special toolbox.