RGB Spectrum Quadra User's Guide - Manual (Page 94)

I M A G E C O N C E P T S
Image Rectangles
350-7951 Quadra User’s Guide 86
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DESTINATION
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Each input’s destination rectangle is defined in terms of the display device’s
screen space coordinates, rather than the input picture’s coordinates. Each
destination rectangle represents the source rectangle mapped to a specific size
and position on the display.
In the example below, the display monitor is 1280 x 1024. The full size source
rectangle from
Figure A-1 is mapped to a destination rectangle, starting at
coordinates ( 300 , 500 ), with a horizontal width of 600 pixels and a vertical
height of 250 lines.
Figure A-3. Full Size Source mapped to Destination
The Window Destination Rectangle (WDR) command defines the size and
position of the destination rectangle for the image displayed on the output
channel.
Thus, to map the full size picture from Figure A-1 (WSR 0 0 639 , 479 ) to a
destination rectangle, the WDR would be defined as:
300 500 600 250
Note that in this example the original image size (the source) is 640 x 480 pixels
but the size of the destination is 600 x 250. The resulting image (destination
image) is smaller than the original and also has a different aspect ratio. Also the
image is no longer located at the top left (origin) of the output display, but is
moved more towards the center.