Date: Thu, 31 Dec 2015 03:40:18 +1100 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Warren Block <wblock@wonkity.com> Cc: Roland Smith <rsmith@xs4all.nl>, freebsd-questions@freebsd.org Subject: [solved] [OT] Light frequency or wavelength to (eg RGB) colour Message-ID: <20151231033050.R8562@sola.nimnet.asn.au> In-Reply-To: <alpine.BSF.2.20.1512300846440.68347@wonkity.com> References: <20151231012759.I8562@sola.nimnet.asn.au> <alpine.BSF.2.20.1512300846440.68347@wonkity.com>
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On Wed, 30 Dec 2015 08:49:41 -0700, Warren Block wrote: > On Thu, 31 Dec 2015, Ian Smith wrote: > > > does anyone know of a method - preferably a formula - for converting > > known frequencies (or complementarily, their wavelengths) within the > > visible spectrum to its colour rendition in RGB, CMYK or whatever? > > http://stackoverflow.com/questions/1472514/convert-light-frequency-to-rgb > > The first answer supplies as many formulas as anyone might want. Scroll down > and there is a Pascal routine to actually do the conversion. Thanks Warren .. indeed that leads into quite a number of rabbit holes. Thanks also to Roland Smith who sent me offlist (due to OT :) a link to his neat rendition in Python from apparently the same Pascal code: https://github.com/rsmith-nl/wavelength_to_rgb Thanks again folks; much easier than I thought this was going to be. cheers, Ian
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