Operation

GeoCorrection

V. Keystone

H. Keystone

Pincushion

0

0

0

GeoCorrection: Projector placement and other factors can cause geometric distortion in the projected image. To correct this, select GeoCorrection from the Installation menu. This sub-menu provides the following options:

V. Keystone/H. Keystone: To correct distortion resulting from the angle of projection, select V. Keystone or H. Keystone from the GeoCorrection menu and use the or button to make the image rectangular. See Figure 4-6.

Tip

Vidikron recommends that the keystone feature not be used unless

absolutely necessary, as it may cause artifacts in the image.

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Horizontal Keystone Correction

+

Projector

Projected Image

Negative values

 

 

 

 

 

 

 

 

 

 

 

Positive values

compress left side.

 

 

 

 

 

 

 

 

 

 

 

compress right side.

-

 

 

Vertical Keystone Correction

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Negative values

Positive values

compress bottom.

compress top.

Figure 4-6. Keystone Correction

54

Vidikron Vision Model 65/Model 75 Installation/Operation Manual

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Vidikron Vision 65, Vision 75 operation manual Horizontal Keystone Correction, Vertical Keystone Correction