Parameters of Chromaticity Coordinates Tool

With Chromaticity coordinates tool, you can view colorimetric data at the point on which the cursor is located.

Note: The white curve indicates the color of a black body source in respect of the temperature. The triangle indicates the domain where your screen displays real color.

With the first list of values, you can choose the units you want in the chromaticity diagram.

The link between xyY and u'v'Y coordinates systems is given by: u' = 4.x / (-2.x+12.y+3) v' = 9.y / (-2.x+12.y + 3)

Current Color

On the chromaticity diagram, you can zoom by drawing a rectangle.

L* is the average value of all the L* of the area.

Note: You can view the temperature of the color in the status bar. The temperature is automatically updated when moving the mouse over the map. This temperature depends of the spectrum.

Note: Ra value is also displayed in the status bar. You must resize the window to see the value. For more details, you can view Parameters of the Color Rendering Index.

Reference Color

You can select the Reference color check box to set a reference color and to calculate the DeltaE between reference color and selected color.

Colorimetric Data 3D

The Colorimetric Data 3D button allows you to display a 3D representation of the colorimetry map.

Refer to 3D Colorimetric Data chapter for more details.

CLS File

By right-clicking on the diagram, you can display contextual menu and choose to display some information.

By clicking Standard, Select standard..., you can display Colorimetric Standard File (*.cls) box.

By double-clicking on directories, you can select a .cls file.

The definition of a standard is stored in a .cls file. The installation creates some .cls files in C:\ProgramData\Ansys\v2XX\Optical Products\Colorimetry directory.

Note: You can define or add your own standard by adding .cls files into this directory. You can define the default standard used by Standard, Draw standard. For more details, you can view Colorimetry.

CLS File format is the following for a definition with line equations.

Line 1

This is a header line. OPTIS standard color v1.0

Line 2

This is a comment line as the standard description. SAE J578 June 27th

Line 3

This line is the definition with line equations. 0

Line 4

This line is the number of areas. 7

Line 5

This line is the name of first area. Selective Yellow

Line 6

The colorimetric diagram is a limit of the area. 1

Line 7

The line is the number of lines without limits given by the colorimetric diagram. 3

Line 8, 9, 10

The lines are operators a and b. Operators a and b correspond to the line equation y= ax+b. Operators < and > give the position of the area regarding the line. Use = for x = constant, for example = 0.5 0 for x=0.5. > 0.58 0.14> -1 0.97>1.29 -0.1

N Lines

Next lines are for the next area as described from lines 5 to 10.

CLS File format is the following for a definition with list of vertexes.

Line 1

This is a header line. OPTIS standard color v1.0

Line 2

This is a comment line as the standard description. MIL-S-22885/101C

Line 3

This line is the definition with list of vertices. 1

Line 4

This line is the number of areas. 7

Line 5

This line is the name of first area. Red

Line 6

The colorimetric diagram is a limit of the area. 1

Line 7

The line is the number of vertexes. 4

Line 8

The line is the (x,y) of first vertex. 0.665 0.334

Line 9

The line is the (x,y) of second vertex. 0.659 0.335

N Lines

Next lines are for the (x,y) of the next vertex and then lines for the next area as described from lines 5 to 9.