File:Linear visible spectrum.svg

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Summary

Description
English: A linear representation of the visible light spectrum. Colour ranges were taken from 'CRC Handbook of Fundamental Spectroscopic Correlation Charts' (see w:Visible spectrum). Spectral XYZ locus coordinates were found here. Every 10nm, the spectral locus point was used as the initial point in a search for a matching sRGB colour (assuming "Dim" viewing condition). The search was carried out by a binary search along a line in CIECAM02 JCh space between the spectral point, and a point with 0.3 * brightness (J), 0 chroma (C), and the same hue (h) as the spectral point. The search finished when a point was found that was in sRGB space. The CAT02 matrix was modified as suggested in Brill(2008) to reduce yellow-blue problems by replacing the bottom row (0.0030, 0.0136, 0.9834) with (0,0,1). An iterative smoothing was carried out to eliminate the largest jumps in chroma (greater than 5% change). Code used to generate the colour gradient can be found here.
Esperanto: Koloroj videblaj
Nederlands: Kleurenspectrum
中文(简体):软件模拟的可见光谱。
中文(繁體):軟體模擬的可見光譜。
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Author Gringer
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27 August 2008

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Date/TimeThumbnailDimensionsUserComment
01:53, 31 August 2008Thumbnail for version as of 01:53, 31 August 2008605 × 115 (13 KB)GringerUpdated using "Electric violet" colour @ 400nm, Luminosity reduced to remove Mach bands
02:18, 30 August 2008Thumbnail for version as of 02:18, 30 August 2008605 × 115 (13 KB)GringerAttempt assuming monitor RGB are the same as monochromatic wavelengths from http://www.cis.rit.edu/mcsl/research/broadbent/CIE1931_RGB.xls, used wavelengths from there for transition points (except for violet, which was left at 422nm).
11:59, 29 August 2008Thumbnail for version as of 11:59, 29 August 2008605 × 115 (13 KB)GringerAttempt using RGB colours from http://hyperphysics.phy-astr.gsu.edu/hbase/vision/cie.html#c4
04:01, 29 August 2008Thumbnail for version as of 04:01, 29 August 2008605 × 115 (13 KB)GringerAdded cyan point at 495nm, reduced luminosity of most colours in an attempt to remove w:Mach bands
04:47, 28 August 2008Thumbnail for version as of 04:47, 28 August 2008605 × 115 (13 KB)GringerChanged violet RGB representation to "colour wheel violet"
04:30, 28 August 2008Thumbnail for version as of 04:30, 28 August 2008605 × 115 (13 KB)GringerForgot to re-align wavelength bands to start of rectangle
04:25, 28 August 2008Thumbnail for version as of 04:25, 28 August 2008605 × 115 (13 KB)GringerReverted to old colours (with metadata), added wavelengths at transition points (to make more like Image:Logarithmic visible spectrum.svg
03:01, 28 August 2008Thumbnail for version as of 03:01, 28 August 2008600 × 70 (2 KB)GringerRemoved metadata in SVG to reduce file size.
02:52, 28 August 2008Thumbnail for version as of 02:52, 28 August 2008600 × 70 (5 KB)GringerReduced luminosity for colours to make transition less jarring Category:spectrum
05:10, 27 August 2008Thumbnail for version as of 05:10, 27 August 2008600 × 70 (5 KB)Gringer{{Information |Description={{en|1=A linear representation of the visible light spectrum. Colour ranges were taken from 'CRC Handbook of Fundamental Spectroscopic Correlation Charts.' (see w:Visible spectrum) Except for violet (422nm), reference colour
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