Object Model Reference : Classes : C : Color : Properties : Color.YIQLuminanceY
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| Object Model Reference : Classes : C : Color : Properties : Color.YIQLuminanceY |
Property YIQLuminanceY As Long
Member of Color
The YIQLuminanceY returns or specifies the Y color value for the YIQ color model in CorelDRAW. The Y value sets the luminance, or brightness, in the YIQ color model. Values range from 0 to 255.
A color is an effect applied to an object that alters the object’s appearance by the way it reflects light. A color model is a system that defines the number and type of colors that make up an image and that is used to organize and define colors according to a set of basic properties that can be reproduced. Black-and-white, grayscale, RGB, CMYK, and paletted are examples of popular color modes.
The YIQ color model is a color model used in television broadcast systems (North American video standard, or NTSC). Colors are split into a luminance value (Y) and two chromaticity values (I and Q). On a color monitor, all three components are visible. On a monochrome monitor, only the Y component is visible. The square, two-dimensional visual selector defines the I and Q values, and the vertical visual selector defines the Y value. All values are scaled from 0 to 255.
The following VBA example sets the fill of the object to YIQ purple and displays the YIQLuminanceY value in a message box.
Sub Test() |
With ActiveSelection.Shapes(1).Fill.UniformColor |
.YIQAssign 100, 255, 255 |
MsgBox .YIQLuminanceY |
End With |
End Sub |
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