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File:Gnuplot HSV gradient.png

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Summary

Description
English: 2D RGB profile of the rainbow color gradient ( gnuplot HSV gradient)
Date
Source Own work
Author Adam majewski
Other versions
  • HSV 2D profile of the rainbow gradient
    HSV 2D profile of the rainbow gradient
  • 3D rgb profile of the rainbow gradient
    3D rgb profile of the rainbow gradient

Licensing

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w:en:Creative Commons
attribution share alike
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Gnuplot source code

"The map is obtained by linearly varying the hue through all possible values while keeping constant maximum saturation and value." [1] 

set palette model HSV functions gray,1,1
set terminal png
set output 'p.png'
test palette

or 

set palette model HSV defined ( 0 0 1 1, 1 1 1 1 )


or 

set palette model HSV 
set palette rgbformulae 3,2,2
test palette

where:

  • 3 = x
  • 2 = 1


Test: 

show palette

palette is COLOR
color mapping by defined gradient
figure is POSITIVE
all color formulae ARE NOT written into output postscript file
allocating ALL remaining color positions for discrete palette terminals
Color-Model: HSV
gamma is 1.5

show palette gradient

0. gray=0.0000, (r,g,b)=(0.0000,1.0000,1.0000), #00ffff =   0 255 255
1. gray=1.0000, (r,g,b)=(1.0000,1.0000,1.0000), #ffffff = 255 255 255

Octave src code

## https://octave.sourceforge.io/octave/function/hsv.html
## Show the 'hsv' colormap profile and as an image
 cmap = hsv (256);
 subplot (2, 1, 1);
  rgbplot (cmap, "composite");
 subplot (2, 1, 2);
  rgbplot (cmap);
  1. ↑ octave function hsv

Captions

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inception

3 January 2019

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Date/TimeThumbnailDimensionsUserComment
current19:50, 3 January 2019Thumbnail for version as of 19:50, 3 January 2019640 × 480 (43 KB)Soul windsurferUser created page with UploadWizard

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