Analyzing Colorimetric Data

Three tools are available to analyze colorimetric data.

  • If you want to see colorimetric data at a specific pixel location, you can click Tools, Colorimetric data... or .

    You will access to an average value, in the area, in the XYZ system. For more details, you can view Parameters of Chromaticity Coordinates Tool.

  • If you want to analyze the error between the color displayed by the screen and the reality for all points of the map, you can click Tools, Colorimetric error....

    The true color luminance map is replaced by a colorimetric error map displayed in false color.

    When the dynamic of the luminance map is higher than the one of the screen, the Lab compresses the luminance.

    With colorimetric error tool, you can analyze the error between the color after compression and the color really displayed by the screen.

    The colorimetric error is calculated using the CIE94 (1 :1 :1) formula (CIE 116-1995). This error is given without unit.

    When the dynamic of the luminance map is lower than the one of the display, there is no luminance compression. In this case the displayed error is the one between the color contained in the luminance map and the one really displayed.

  • If you want to have all information about the spectrum for all points of the map, you can click Tools, Spectrum... or . For more details, you can view Spectrum Editor.

  • If you want to read the color rendering index values, you can click Tools, Color Rendering Index (CRI) ....

    For more details, you can view Parameters of the Color Rendering Index.

Differences between current color and scale color

The scale next to the color chart displays colors with a luminance between 0 and the value that was entered in the Level dialog box. If the current color is different from the scale color, it means the color you want to display is highly saturated. In that case, you may use a more appropriate display mode, such as the Maintain hue mode (Tools, Color space conversion, Maintain hue). This mode keeps the hue of color outside of the monitor gamut and changes the chromaticity until the color can be displayed.