Isaac Muse facelessuser

Interpolation with Kubelka-Munk Theory

Approach

This is an experiment showcasing interpolation via Kubelka-Munk theory. Approach generally employs the method as outlined in Spectral.js. Most of foundational topics are covered in Mixbox's paper, though Spectral.js uses an approach less focused on specific paints and instead opts to generalize and simplify the approach by simply generating reflectance curves directly from the spectral data. Results don't necessarily mimic specific paints, but give a pigment like feel.

	## MIT License
	##
	## Copyright (c) 2023 Ronald van Wijnen
	##
	## Permission is hereby granted, free of charge, to any person obtaining a
	## copy of this software and associated documentation files (the "Software"),
	## to deal in the Software without restriction, including without limitation
	## the rights to use, copy, modify, merge, publish, distribute, sublicense,
	## and/or sell copies of the Software, and to permit persons to whom the
	## Software is furnished to do so, subject to the following conditions:

	## MIT License
	##
	## Copyright (c) 2023 Ronald van Wijnen
	##
	## Permission is hereby granted, free of charge, to any person obtaining a
	## copy of this software and associated documentation files (the "Software"),
	## to deal in the Software without restriction, including without limitation
	## the rights to use, copy, modify, merge, publish, distribute, sublicense,
	## and/or sell copies of the Software, and to permit persons to whom the
	## Software is furnished to do so, subject to the following conditions:

	"""
	Msh color space.

	Accounts for negative lightness and uses degrees for hue instead of radians.

	- https://www.kennethmoreland.com/color-maps/ColorMapsExpanded.pdf
	"""
	import math
	from coloraide import Color as Base
	from coloraide import stop

	"""OkTCh color space."""
	from __future__ import annotations
	import math
	from coloraide import algebra as alg
	from coloraide import util
	from coloraide.cat import WHITES
	from coloraide.channels import Channel, FLG_ANGLE
	from coloraide.types import Vector
	from coloraide.spaces.lab import y_to_lstar, lstar_to_y
	from coloraide.spaces.lch import LCh