Rgb-spectrum Quadra User's Guide Manuel d'utilisateur télécharger pdf (Page 94)

IMAGE CONCEPTS

Image Rectangles

350-7951 Quadra User’s Guide 86

. . . . .

DESTINATION

. . . . . . . . .

RECTANGLE

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.

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Rgb-spectrum Quadra User's Guide Manuel d'utilisateur Page 94