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3.4 Spreading One Picture Over a Wall
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3.4.1 Scaling and Cropping
Sometimes the picture does not fit the wall. If the source picture is video from a DVD, the aspect ratio
is probably 1.77 (16x9), the same as HDTV.
The aspect ratio of a picture is its width divided by its
height. 1024 ÷ 768 = 1.33
The aspect ratio of a Margay is 1.77 (16x9), the same
as HDTV. When the source picture’s aspect ratio is
not the same as the Margay wall, you have to do
something to make the picture fit. You have some
basic choices:
• Fill the area both ways. This will produce some
distortion in the picture. Circles will not be
round.
• Put the picture in without distortion and crop off
the sides (or top and bottom).
• Put the picture in without distortion and fill the
extra space with black or some other solid color.
• Force an aspect ratio, such as 16 x 9 or 4 x 3.
This is a 1.77 picture shown on a 3x3 wall of Mar-
gays. The picture fills the wall nicely, and there is no
distortion or cropping.
Let’s start with a 1.33 (4x3) picture, the aspect ratio
of normal TV, and put it on this same wall of Mar-
gays. Here is the original picture.
Scale Mode determines how the picture will be made
to fit the wall.
• Fill All means that the picture will touch the bor-
ders of the wall all around, even if this means
stretching (and distorting) the picture in one
direction. The picture had to be stretched side-
ways to fill the screens.
• Letterbox means expand the picture until the first
edges (top-bottom or left-right) touch the border
of the wall, then fill in the other sides with a solid
color.
• Crop means expand the picture until the second
edges touch the border and let the other edges of
the picture fall outside the wall and get cropped.
Here the width is filled, there is no distortion, but
A picture with an aspect ratio of 1.77 is shown on a 3x3
wall of Margays.