COLOR SCIENCE


SPECTRA

The spectra to the right were generated using different RGB values for wavelengths between 380nm and 780nm. This was done by using a FORTRAN program that uses linear approximations for the RGB color coefficients.


Continuous Spectrum


Absorption Spectrum of Hydrogen


Emission Spectrum of Hydrogen


CHROMATICITY DIAGRAM

The CIE XYZ chromaticity diagram to the right was created using a FORTRAN program or Basic code that computes the red, green and blue color coefficients for each coordinate (x,y). For another approach, see the UNIX cietoppm utility which is a NETPBM extension.

BLACKBODY RADIATION

The diagram to the right was created using a FORTRAN program that computes the red, green and blue color coefficients for hot objects. The program uses the CIE color matching functions and Planck's distribution function for the spectral radiance of a blackbody. Someone has now converted the FORTRAN code into C code.


EYE SENSITIVITY

The three white curves to the right indicate the sensitivity level for the three types of cones. The black curve indicates the sensitivity of the rods[1]. The peak response moves from 550 nm to 500 nm at night.[2].


COLOR RELATED INFORMATION

OTHER RELATED PAGES


Dan Bruton
astro@sfasu.edu

Roy G. Biv