Function File: rgb = wavelength2rgb (wavelength)

Function File: rgb = wavelength2rgb (wavelength, class)

Function File: rgb = wavelength2rgb (wavelength, class, gamma)

Convert wavelength in nm into an RGB value set.

Given a N-dimensional matrix wavelength with color values in nm, returns a RGB image with N+3 dimensions.

wavelength2rgb (400)
    ⇒ [0.51222 0.00000 0.70849]

wavelength2rgb ([400 410])
    ⇒ 0.51222   0.49242
    ⇒ 0         0
    ⇒ 0.70849   0.85736

The rgb class can be specified with class. Possible values are double (default), single, uint8, uint16, and int16.

wavelength2rgb (400)
    ⇒ 0.51222  0.00000  0.70849

wavelength2rgb (400, "uint8")
    ⇒ 131    0  181

The luminance of colors can be adjusted with gamma which must a scalar value in the range [0 1]. Defaults to 0.8.

Reference:

• http://stackoverflow.com/questions/2374959/algorithm-to-convert-any-positive-integer-to-an-rgb-value
• http://www.midnightkite.com/color.html per Dan Bruton

Demonstration 1

Package: image