Illuminant

CHROMiX ColorThink
1

Hello,
2 questions regarding the illuminant when using spectral data :

  1. what kind of format I must use if I’m trying to open my own light spectral measurement? ( I tried to open .cxf and .txt files without success )
  2. Can I use measurements bellow 380 nm ? ( let’s say between 300-380nm )
    Thanks
2

The standard .txt format that Gretag Macbeth uses will work. If you have ProfileMaker installed (a free download from Xrite/GretagMacbeth) you can find the spectral measurements of their light sources here: ProfileMaker 5.x.x application folder, Measurement files, Light Sources.

I’m trying to figure out how to load a text file into the ColorWiki, so you can grab the file there to use as a reference.

colorwiki.com/wiki/ColorThin … ctral_Data

Light box GTI D50.txt

Measurements below 380nm won’t work, or at least they won’t be recognized. They will be ignored.

3

Although the Gretag Macbeth format worked for CTPro, if you have a file with more than one illuminant in it then CTPro only appeared to read the first entry and ignores the others. (This was in CTPro beta in February 2006).

I have created my own files by copying the format from the Gretag files and adding illuminant data captured by my Eye-One Photo spectrophotometer (extracting them from the .cxf file created by Eye-One Share and then by using a text editor to open the .cxf file and transferring spectral data to the correct format).

Simon