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KRAMER ELECTRONICS LTD.
USER GUIDE
MODEL:
VP-790
Blending Projected Images on a
Curved Screen
P/N: 2900-300214 Rev 1
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Contents
1 Introduction 1
2 Setting the Basic System 2
2.1 Optical Alignment 3
3 Setting Blend Width 7
4 Warp Adjustment 10
4.1 Warp the Projection Image on to a Curved Screen 10
Figures
UFigure 1: Basic SetupU 2
UFigure 2: Image ProjectionU 3
UFigure 3: Input ScreenU 4
UFigure 4: Multiunit ScreenU 5
UFigure 5: Two Overlapping Images on a ScreenU 6
UFigure 6: Two Projected Images Displaying the Horizontal Bar Test PatternU 7
UFigure 7: Left Hand Blend Width Correctly AdjustedU 8
UFigure 8: Blend Width Correctly Adjusted on both ScalersU 9
UFigure 9: The Cross Hatch (F) Warp PatternU 10
UFigure 10: VP-790 Warp Generator Main WindowU 11
UFigure 11: Auto Connect WindowU 12
UFigure 12: Connect to Unit WindowU 12
UFigure 13: A New 2x2 GridU 12
UFigure 14: Setting a Grid Mesh of Nine PointsU 13
UFigure 15: Setting the WarpU 13
UFigure 16: Adjusting the LinearityU 14
UFigure 17: Complete Linear AdjustmentU 15
UFigure 18: Blend Curve Type – S-CurveU 15
VP-790 Blending Images – Introduction i
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1 Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been
providing a world of unique, creative, and affordable solutions to the vast range of
problems that confront the video, audio, presentation, and broadcasting
professional on a daily basis. In recent years, we have redesigned and upgraded
most of our line, making the best even better!
Our 1,000-plus different models now appear in 11 groups that are clearly defined by
function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers;
GROUP 3: Control Systems; GROUP 4: Format/Standards Converters; GROUP 5:
Range Extenders and Repeaters; GROUP 6: Specialty AV Products; GROUP 7:
Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9:
Room Connectivity; GROUP 10: Accessories and Rack Adapters and GROUP 11:
Sierra Products.
This online guide describes how to blend two projected images accurately onto a
curved screen via the Kramer VP-790 Warp Generator application software.
VP-790 Blending Images – Introduction 1
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2 Setting the Basic System
The basic system, illustrated in Figure 1, shows a video source distributed to two
VP-790 units and output to two identical projectors.
Figure 1: Basic Setup
One video source is distributed to both VP-790 units via a distribution
amplifier (for example, the Kramer VM-2Hxl).
Each VP-790 unit outputs the signal to a separate projector.
To successfully blend two or more projections:
• Each projector should be of the same manufacture and of the same model
• The projector lamps should be of the same age
• DLP color wheels should be designed for video
• The ‘dynamic gamma’ and ‘dynamic contrast’ applications should be set to off
2 VP-790 Blending Images - Setting the Basic System
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2.1 4BOptical Alignment
UFigure 2U shows an example of the two 4:3 projectors being used to project a single
16:9 image.
Figure 2: Image Projection
Set the projectors so that the light from both projectors covers the whole screen
area.
Use the VP-790 built-in test patterns to adjust the position, zoom and focus of both
projectors.
VP-790 Blending Images – Setting the Basic System 3
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2.1.1 Setting the VP-790 Functions
Set the VP-790 functions via the OSD menu as follows:
• Select Setup, Control Setup and then set the Menu Timeout to Infinite to turn
off the menu timeout
• Select Output, then select Resolution to set the output resolution to the native
resolution of your projector to enable the VP-790 to scale the image
Setting the output resolution to a resolution other than the native resolution would result
in the projector re-scaling the image!
• Select Output, then select Aspect Ratio to fit the aspect ratio to the display’s
natural aspect ratio
• Select Setup, Frame Lock and select Source
• Select Output, Frame Rate and select Auto
2.1.2 Setting Multiple Units Matrix
Set both VP-790 units as follows:
1. Select Input, Source and then Test Pattern.
Figure 3: Input Screen
4 VP-790 Blending Images - Setting the Basic System