CVRL functions available at 8 dp or 9 sf

The functions provided below result from our research into human cone spectral sensitivities and luminous efficiency. These versions are provided to either 8 dp for logarithmic data or to 9 sf for linear data. They provide a consistent set of colorimetric and photometric data that can be used to model and predict normal and dichromatic colour vision for standard target sizes of 2-deg or 10-deg in diameter. The data are provided either as ascii csv (comma separated values) files, as ascii xml (extensible markup language) files, as html tables—which appear in your browser window, or as dynamic graphical plots. Select the data format, the data stepsize and the data units and click the "Submit" button. For further details and references click . To return to the standard functions to 5 dp or 6 sf click here.


Stockman & Sharpe cone fundamentals

2-deg fundamentals based on the Stiles and Burch 10-deg CMFs adjusted to 2-deg

Format  
Energy (log)
Energy (linear)       5 nm Cones
   

10-deg fundamentals based on the Stiles and Burch 10-deg CMFs

Format  
Energy (log)
Energy (linear)       5 nm Cones
   

Luminous efficiency functions

2-deg functions

Format  
Energy (log)
Energy (linear)       5 nm Cones
   

10-deg functions

Format  
Energy (log)
Energy (linear)       5 nm Cones
   

MacLeod-Boynton chromaticity coordinates

2-deg functions

Format  
      5 nm Cones
 

10-deg functions

Format  
      5 nm Cones