CGATS.5 Data Exchange Format, from the Annex J, of the ANSI
This is a general purpose ASCII file format suitable for
representing color data, and widely used to store color test values.
Argyll uses this as a base, human readable format, for a variety of
Colorimeter Correction Matrix. This is an ASCII text, CGATS, ArgyllCMS specific format,
used to hold a 3x3 correction matrix. The matrix is for a specific
display and Colorimeter, and is used to transform the instruments
XYZ values to make them better match a reference spectrometers
measurements for that display. The file contains a description of
the display, Colorimeter and reference Spectrometer. See ccxxmake
for more information.
Colorimeter Calibration Spectral Set. This is an ASCII text, CGATS, ArgyllCMS specific format,
used to hold a set of display spectral samples. For Colorimeters
that have known sensor spectral sensitivity information (such as the
i1d3 and Spyder4), this allows a calibration to be created that is
tuned for a particular display. The file contains a description of
the display, the display technology type, the type of spectrometer
used for taking the readings. See oeminst and ccxxmake for
more information. The format is similar to a .sp file.
Chromatic Adaptation is the human visual systems behavior of
adapting so that the dominant, non-chromatic colors in our field
of view appear neutral, thereby maximizing our sensitivity to
small color differences. With typical materials, this is dominated
by the color of the illumination of the scene. When dealing with
measured colors, it is important to be able to mimic this
behavior, and this is typically done using a Chromatic Adaption
matrix, with the white point of the media or colorspace used as an
approximation of the viewers state of adaptation.