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3.5 Making the Picture Fit the Screen
Aspect ratio is the width of a picture divided by its height. When the aspect ratio of the source picture
differs from the aspect ratio of the Panther screen, something must be done to make the picture fit the
screen.
The aspect ratio of the screen Panther is 4:3 or 1.33,
which is the aspect ratio of 1600 × 1200 UXGA pic-
tures. This is fine for most picture sources.
Aspect Ratio is ratio of the width to the height of
the screen, expressed as two whole numbers (4:3,
16:9) or a decimal number (1.33, 1.77).
When aspect ratios are not the same
When the aspect ratio of the source picture is not
the same as the aspect ratio of the Panther, the pic-
ture will not fit the screen. You have several choices:
If the source aspect ratio is greater than 1.33
When the source picture’s ratio is greater than the
display (for instance, source 1.77, display 1.33) you
have choices such as these:
1. Fill the screen for width without distortion and
leave space at the top and bottom. The system
expands the picture horizontally until it fits the
screen: no distortion.
1. Fill the screen for height without distortion and
let the sides be cropped off. The system expands
the picture vertically until if fits the screen: no
distortion.
1. Fill the screen for width and stretch it to fit verti-
cally. The system expands the picture horizontally
until it fits the screen, then stretches it to fill the
screen vertically: some distortion results.
If the source aspect ratio is smaller than 1.33
When the source picture’s ratio is less than the
display (for instance, source 1.25, display 1.33) you
have choices such as these:
1. Fill the screen for height and leave space at the
sides.
2. Fill the screen for width and let the top and bot-
tom be cut off.
3. Fill the screen for height and stretch it horizon-
tally to fit. This produces some distortion.
In the Aspect Ratio menu, described in the next
section, you choose how you want to display the pic-
ture. The background color, which shows in strips at
the top and bottom in example 1, is taken from the
User Curtain color. (You will learn how to set this
color in “Curtain and Its Colors” on page 86.)
1600
1200
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1.33 =