PRG Mbox Remote Manual 3.9 - Manual (Page 91)

MBOX ® REMOTE USER MANUAL 85
Background Image
A background image can be added to a context in order to better visualize the pixel mapping configuration. The
background type can either be a still image or a live stream image.
Still Image Backgrounds
A still image must be in JPEG or a PNG format. A PNG can have an alpha channel (transparency). The image is
imported and saved within the pixel map (.pmap) configuration file, so therefore it moves with the file - though it may
increase the file size if numerous background images are used. (There is a pop-up menu option to remove unused
image files if file size becomes an issue - see instructions below.)
The background image has an offset (x and y) so it can be placed in the correct position within the context. The origin,
in this case, is the top-left corner. The image can be rotated by entering an arbitrary degree value in the Rotation field.
The background image has width and height settings to determine what gets squashed or stretched to fit onto the
context. Therefore, if the aspect ratio of the image and the context do not match, the image will not be displayed at
the correct aspect ratio unless some portion of it is clipped (or there is blank area with no background image). For
best results, either the context needs to be the same aspect ratio as the background image, or the background image
width and height need to be adjusted to correct the aspect ratio. For example, if a background image is 1280 x 1024
but the context is 16 x 9, the background height could be reduced to 720 (clipping), or the background width could be
increased to 1820 (blank space).
Live Stream Backgrounds
A live stream image comes from the connected Mbox during a live session with the Mbox Remote application. (Refer
to
"Live Editing" on page 53 for instructions on this type of session.) In this case, the live stream will show the moving
imagery that Mbox is generating for the area of the source that the context is sampling. The live stream will be
pixelated (averaged samples) just as the context is a sub-sampled area of the source.
Sample
Selected Context
Background Image
Settings
Context
Aspect Ratio
(Sub-Sample)
Background Image