File:Linear visible spectrum.svg
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Linear_visible_spectrum.svg (SVG file, nominally 605 × 115 pixels, file size: 18 KB)
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[edit] 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 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): 軟件模擬的可見光譜。
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| Date |
2008-Aug-27 |
| Source |
Own work |
| Author | |
| Permission (Reusing this file) |
See below. |
| Other versions |
Derivative works of this file:
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[edit] Licensing
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:28, 5 August 2010 | | 605 × 115 (18 KB) | Gringer | (10-step iterative chroma smoothing, slightly brighter grey point) |
| 15:34, 4 August 2010 |  | 605 × 115 (18 KB) | Gringer | (Smoothing applied to largest reduction in saturation (blue to cyan)) | |
| 14:40, 4 August 2010 |  | 605 × 115 (18 KB) | Gringer | (Only using one adaptation matrix, finer resolution at blue clip point) | |
| 13:12, 3 August 2010 |  | 605 × 115 (18 KB) | Gringer | (using Chroma-based cartesian coordinates for search) | |
| 12:44, 3 August 2010 |  | 605 × 115 (18 KB) | Gringer | (Modified MH matrix slightly based on [http://www3.interscience.wiley.com/journal/112396194/abstract this]) | |
| 11:51, 3 August 2010 |  | 605 × 115 (18 KB) | Gringer | (whoops, that was an older version) | |
| 11:43, 3 August 2010 |  | 605 × 115 (13 KB) | Gringer | (slightly different MCAT02 matrix, different binary search algorithm) | |
| 16:06, 31 July 2010 |  | 605 × 115 (18 KB) | Gringer | (using CIECAM02 model) | |
| 11:00, 29 July 2010 |  | 605 × 115 (18 KB) | Gringer | (adjusting intensity between linear sRGB and non-linear sRGB, as gamma correction is encoded into that transform.) | |
| 08:51, 29 July 2010 |  | 605 × 115 (18 KB) | Gringer | (Trying a gamma correction of 2.2 (e.g. x^(1/2.2)), rather than square root function) | |
| 11:35, 28 July 2010 |  | 605 × 115 (18 KB) | Gringer | (generated RGB equivalent spectrum using sRGB matrix transform + spectrum->XY lookup tables.) | |
| 04:40, 17 November 2008 |  | 605 × 115 (13 KB) | Gringer | (Added cyan band again, reduced luminosity to try to fit colour with Image:NASA_Hydrogen_spectrum.jpg.) | |
| 01:53, 31 August 2008 |  | 605 × 115 (13 KB) | Gringer | (Updated using "Electric violet" colour @ 400nm, Luminosity reduced to remove Mach bands) | |
| 02:18, 30 August 2008 |  | 605 × 115 (13 KB) | Gringer | (Attempt 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 2008 |  | 605 × 115 (13 KB) | Gringer | (Attempt using RGB colours from http://hyperphysics.phy-astr.gsu.edu/hbase/vision/cie.html#c4) | |
| 04:01, 29 August 2008 |  | 605 × 115 (13 KB) | Gringer | (Added cyan point at 495nm, reduced luminosity of most colours in an attempt to remove w:Mach bands) | |
| 04:47, 28 August 2008 |  | 605 × 115 (13 KB) | Gringer | (Changed violet RGB representation to "colour wheel violet") | |
| 04:30, 28 August 2008 |  | 605 × 115 (13 KB) | Gringer | (Forgot to re-align wavelength bands to start of rectangle) | |
| 04:25, 28 August 2008 |  | 605 × 115 (13 KB) | Gringer | (Reverted to old colours (with metadata), added wavelengths at transition points (to make more like Image:Logarithmic visible spectrum.svg) | |
| 03:01, 28 August 2008 |  | 600 × 70 (2 KB) | Gringer | (Removed metadata in SVG to reduce file size.) | |
| 02:52, 28 August 2008 |  | 600 × 70 (5 KB) | Gringer | (Reduced luminosity for colours to make transition less jarring Category:spectrum) | |
| 05:10, 27 August 2008 |  | 600 × 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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