User guide

A.2 ALEXA Frame Lines
ALEXA frame lines are stored as XML files. A standard set of frame
lines is stored in the camera. Additional frame lines can be loaded from
the SD card to the camera.
Once the idea behind the frame lines system is understood, personal
frame lines can be created with little effort.
Description
The different sections in the file are:
• camera: describes the camera that the frame lines file is made for.
As the ALEXA camera system will consist of several cameras in
the future, this is necessary to differentiate between the camera
types.
• surround: the 10% surround view area outside the recorded
image.
− opacity: opaque masking of the surround area, 0=transparent,
1=black
− border: additional frame around the image if surround view is
switched on in EVF or MON OUT image, with attributes color
and width. Omit the border tag if you do not want the frame
around the image.
• line: all frame lines and the center cross in the active image area
consist of single lines. The line orientation is defined by three
attributes (left and right and bottom or top for horizontal lines,
top and bottom and left or right for vertical lines), where two
attributes define the start and end point, and the third defines the
distance from the parallel image edge.
• Distances for start, end and position are relative to the width or
the height of the image and have a precision of 5.
• To create a centered frame line with a center cross as in the
example, a total of 6 lines is necessary.
• To calculate the position of a horizontal line for a given aspect
ratio, use the following formula: (1-1.78/Aspect)/2=distance from
bottom or top