Chapter 11: Keystone And Shutters; Keystone Correction - High End Systems CATALYST Series User Manual

Chapter 11:
Keystone and Shutters

Keystone Correction

The shape of a projected image is affected by the angle of projection. A rectangular image
may appear on a wall as a trapezoidal shape. Keystone correction compensates for this
effect by allowing adjustments to the geometry of the layer's image.
The eight Keystone Correction parameters each adjust one corner of the layer's image
horizontally along the X-axis or vertically along the Y-axis.
y1
y2
The suggested default DMX value for each parameter is 128, which equals no geometric
correction. Values less than 128 move the selected corner left or up; values greater than
128 move it right or down.
To activate the affects of the Keystone Correction parameters, the Visual Effects
parameter must be assigned to a DMX value of 5 (Keystone 1).
Image with no Keystone correction
Catalyst® V3 Media Server User Manual
x1
Layer Image
x2
x4
y4
y3
x3
Image with Keystone correction
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