Datavideo DVK-300HD, Быстрый старт, Страница: 35 / 43

19 DVK-300HD
The x-axis has been designated as ‘alpha’, with the parameters ranging between:
◾ 0 – a totally transparent colour, and
◾ 1 – a totally non-transparent colour.
4.2.1.2. Default
This function enables the keyed colour to be selected as default.
4.2.1.3.
Detect (RGB)
This function enables automatic selection of the keyed colour as the average of the background of
the RGB parameters.
4.2.1.4. New setup Wizard
This function enables the settings window together with a description of a given functionality to
be activated.
4.2.2. Matte control
4.2.2.1.
Show alpha matte
This function enables the mask view to be switched on or off; the view is presented in grayscale, where:
◾ an area fully transparent is black,
◾ an area fully non-transparent is white.
Drawing 35.
Dependence of transparency on the colour distace from keyed colour
Drawing 36.
The
Show alpha matte
view
1
0
0 |x|
alpha