User manual

Imagestore User Manual Front Panel Operation
Miranda Technologies Ltd Page 57
Images may be masked from the left, right, top or bottom. In each case the
arrow keys W X are used to control the masking.
The minimum and maximum levels are shown to the left and right sides of
line two, with the currently selected level shown in the middle. The right and
left arrow keys W X are used to increase and decrease the setting
respectively and the enter key applies the setting.
Key Parameters
The following three key signal parameters can be set:
♦ Sense (this allows the key signal to be used either normally or inverted)
♦ Source (selects between using no keying, a separately stored key signal,
or an internal key signal derived from the stored picture image)
♦ Type (selects between full or linear keying modes)
For Type, the mode Full Key sums the background (with the key signal
removed) to the foreground. The foreground is only passed where the key
signal is present. This mode is used with self-luma keys. With Linear Key the
mode sums the background (with the key signal removed) to the foreground.
The foreground remains unaffected by the key.
When the Key Parameters option is selected, the parameters are displayed for
selection as shown below. Use the arrow keys W X to move the brackets to
enclose the parameter to be changed and press the enter key to view the
appropriate sub-menu.