High End Systems DML-1200 - Keystone Correction Parameters; Keystone X Ratio

Global Functions
45 ______________________________________________________DML-1200 w/Axon Embedded Graphic Engine 24/12/2010
4.6 Keystone Correction Parameters
When you output an image from a projector at an angle, the image
may appear skewed. Eight
Keystone parameters adjust the image
shape and compensate for this effect. You can control each of the four
corners of the graphics output to reshape an image to a form that
projects correctly.
Default DMX Value: 0 = no keystone correction has been applied.
Each corner has an x and a y value that let you adjust and correct the
scale of the projection from any corner toward the image center on
that axis.
Setting all Keystone X and Y parameters’ DMX values to zero places
the four corners of the image at the four corners of the output.
Adjusting keystone x values toward 255 (100%) moves the respective
x corner positions horizontally toward the center of that image edge.
Adjusting keystone y values toward 255 (100%) adjusts the respective
y corner positions vertically toward the center of that edge.
4.6.1 Keystone X Ratio
The Keystone X Ratio Parameter shapes the output to adjust for keystone effects created in certain output situations. This
parameter adjusts the output by compressing or expanding the image horizontally.
Default DMX Value: 128 (50%) = no adjustment
DMX value settings below the midpoint of the range compress the image horizontally from maximum compression at a value of 0
to no compression at a value of 128. DMX value settings above the midpoint of the range expand the image horizontally from 128
= no expansion to 255 (100%) = maximum expansion.
Top
Top Left X Top Right X
Top
Bottom
Right Y
Bottom Right XBottom Left X
Bottom
Left Y
Right Y
Left Y
Original Content
Keystone Top Left X DMX value = 85
Keystone Top Left Y DMX value = 85
Keystone Top Right X DMX value = 85
Keystone Top Right Y DMX value = 85
Other Keystone parameter DMX values = 255
Keystone Top Left Y DMX value =128
Keystone Top Right X DMX value = 0
Keystone Bottom Left X DMX value = 239
Keystone Bottom Left X DMX value =0
Keystone Bottom Right Y DMX value = 2
Other Keystone parameter DMX values = 255
Original media file
X Ratio DMX value = 255 (100%)