Digital Projection Projector HIGHlite 660 3D Series User Manual

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Operating Guide
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Reduce Black Level Uplift Width (continued)
A detailed view of one of the projectors in a 
two-projector array:
1 Black level uplift region
This image occupies the left half of a 
two-projector array. Black level uplift 
has created artifacts on the edges of 
the blend region.
2 Artifact (left)
This artifact is caused by the 
other projector’s pond of mirrors 
overlapping the black level uplift 
region of this projector. It can be 
eliminated if the black level uplift 
width of this projector is reduced.
3 Blend region
The area in the middle of the array, 
where the two images overlap. 
Black level uplift has not been 
applied here.
4 Artifact (right)
This artifact is caused by this 
projector’s pond of mirrors 
overlapping the black level uplift 
region of the other projector. It 
can be eliminated if the black level 
uplift width of the other projector is 
reduced.
1234
Notes
Main Menu
Edge Blend Reduce Black Level Uplift Width
 For additional information, see The 
DMD™ in the Reference Guide.
 For a detailed step-by-step 
description of the edge blend 
process, see Blending images 
from multiple projectors  further in 
this section.
   
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USING THE PROJECTOR
Reduce Black Level Uplift Width (continued)
In the Reduce Black Level Uplift 
Width menu, settings correspond 
to coordinates within the unblended 
regions. Only relevant coordinates 
are enabled.
To remove the artifact on the left:
1. Open the Reduce Black Level 
Uplift Width menu of the 
projector on the left.
2. Adjust Upper Right X and 
Lower Right X.
3. Select Apply Uplift. The 
black level uplift region of this 
projector will withdraw from the 
pond of mirrors of the other 
projector and the artifact will 
disappear.
To remove the artifact on the right,
• Open the Reduce Black 
Level Uplift Width menu 
of the projector on the right 
and adjust Upper Left X and 
Lower Left X, then select 
Apply Uplift.
Notes
Main MenuEdge Blend Reduce Black Level Uplift Width
 To apply the settings in this menu, 
use the 
Apply Uplift command at 
the bottom of the page.
  For additional information, see The 
DMD™ in the Reference Guide.
 For a detailed step-by-step 
description of the edge blend 
process, see Blending images 
from multiple projectors  further in 
this section.
   
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Blending images from multiple projectors
The following procedure explains how to set up an array of projectors an\
d how to blend the images together.
Before you start
Position the projectors
Ensure that all projectors are in good working order.
Position the projectors so that they are within the required throw dista\
nce range. Position the screen where it will remain during operation.
In the initial stages of the procedure you will be using test patterns, \
therefore it is not necessary to connect the input at this stage. Howeve\
r, 
you need to make sure that you are able to connect the inputs without mo\
ving the projectors.
Control the projectors
You can control the projectors individually by using:
• their respective control panels, or
• a dedicated remote control for each projector, or
• a single remote control for all projectors. To do so, you need to assign a different IR address for each projector.
Consider connecting the projectors in a LAN network and using the Projec\
tor Controller application to monitor the projectors and change  
settings on the whole array at once.
Notes
 For information about changing 
the IR address of a projector, see 
Setting up an IR address  further in 
this guide.
  The Projector Controller software 
is available for download from the 
Digital Projection website, free of 
charge.
   
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Edge Blend procedure
1. Align the projectors as they will be used in the array.
Each projector should be perpendicular to the screen, or as close as pos\
sible. Ideally, each projector should allow for a minimum of 20% 
screen overlap where it is adjoined by other projectors. Overlaps should\
 be the same in size across the array.
How to align the projectors:
• Ideally, all alignment should be achieved by physically moving the projectors a\
nd by using the Lens Shift and Zoom functions.
• If necessary, use Image > V Position and H Position.
• Do not use geometry corrections.
Example: 1080p projector overlapped on all 
sides
1 Overlap to the left
This overlap takes 20% of the image width, or 384 
pixels.
2 Overlap to the top
This overlap takes 20% of the image height, or 
216 pixels.
3 Area without overlaps
This area is also called unblended region.
Notes
A 1080p projector with 20% overlaps on all sides
321
1920 pixels
384 pixels
1080 pixels
216 pixels
   
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Edge Blend procedure (continued)
2. Ensure that all projectors are color-matched.
If necessary, use the White Field test pattern and test the light output of each projector. 
Ensure the Color > Gamut setting has the same value across the array.
Use Lamps > Lamp Power to compensate for different lamps. Even identical lamps change their light output with age an\
d use.
3. Enter the correct gamma setting.
Adjust the gamma setting using the Image > Gamma control. For video sources, such as Blu-ray or DVD, use a value of 2.2; for 
computer graphics use 2.4.
The images may still look slightly different at this stage. It is OK to continue.
Notes
1 Projector 1: incorrect settings
Before the color-match this 
image has incorrect color gamut 
and lamp power settings
2  Projector 2: correct settings
12
Before color-match
12
After color-match
   
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Edge Blend procedure (continued)
4. Set up the array.
For each projector, open the Edge Blend menu and enter Array Width, Array Height, Array H Position and Array V Position.
Array Width and Array Height should be identical for all projectors. These settings define the size of the array. For example, a two-by-
two array will have the following values:
• Array Width = 2
• Array Height = 2
The top left projector will have Array H Position = 0 and Array V Position = 0.
1 Top left
Array H Position = 0Array V Position = 0
2 Top right
Array H Position = 1Array V Position = 0
3 Bottom left
Array H Position = 0
Array V Position = 1
4 Bottom right
Array H Position = 1
Array V Position = 1
21
34
Notes
   
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Edge Blend procedure (continued)
5. Define blend regions.
From the Edge Blend menu on all projectors, 
set Blending to Align Pattern.
Set up Blend Width on each projector so 
that the align patterns overlap perfectly and 
completely cover the blend regions (Fig. 2).
If necessary, physically move the projectors 
and/or use Lens Shift and Zoom again to 
align the array perfectly
Fig. 2
1 Left projector
2 Align pattern of left projector
The red arrow next to the align pattern 
shows what correction needs to be made 
for the align pattern to cover the whole 
blend region.
3 Blend region
The brighter ribbon in the middle is 
overlap area not covered by the align 
patterns.
4 Align pattern of right projector
The red arrow next to the align pattern 
shows what correction needs to be made 
for the align pattern to cover the whole 
blend region.
5 Right projector
Fig. 1 Align patterns make it easy to see where the overlap is not perfect
Fig. 2 Projectors with align patterns not covering the blend region
21
45
3
Notes
   
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Edge Blend procedure (continued)
6. Uplift black levels (optional).
If you do not need to uplift the black levels, skip 
to step 8, Blend the images.
Switch all projectors to the Black Field test pattern.
The level of black will differ across the image as 
shown in Fig. 1. Uplift the black levels using Edge 
Blend > Black Level Uplift.
How to uplift black levels
Regions may be overlapped by two or four 
projectors. An array will always contain regions 
overlapped by at least two projectors.
• x2 overlaps
If your array only contains two-projector 
overlaps, you need to uplift the black levels in 
the unblended regions – the exact value will 
depend on the projector, environment, etc. 
Do not uplift black levels in the overlapping 
region(s).
• x2 and x4 overlaps
Sometimes a region is overlapped by four 
projectors. For example, in a two-by-two 
segment setup, Array Width = 2 and 
Array Height = 2, the region in the middle is 
overlapped by all four projectors (as shown in 
Fig. 1). If your array contains such regions, you 
need to uplift black levels roughly four times in 
the unblended regions, and roughly double in 
the regions overlapped by two projectors.
312
1 Unblended region
This region is not overlapped. Black level should be raised by the 
maximum overlap occurring within the image, therefore the value of  
Black Level Uplift should be the highest here.
2  x2 overlap
This section of the image is overlapped by two projectors, therefore the\
 
correct amount of 
Black Level Uplift should be roughly half the value of 
uplift within the unblended region.
3  x4 overlap
This part of the image is overlapped by four projectors, therefore 
Black 
Level Uplift
 should not be applied.
Fig. 1 Different black levels
Notes
   
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Edge Blend procedure (continued)
7. Adjust uplift edges (optional).
This step is necessary if you 
have uplifted the black levels 
in the previous step.
During the black level uplift 
process, brighter lines appear on 
the edges of the uplifted regions. 
This is due to the inactive area 
around the periphery of the DMD, 
also known as 
pond of mirrors 1.
To remove these edges, use the Edge Blend > Reduce Black 
Level Uplift Width settings for 
each projector individually. Enter 
X and Y corrections for each part 
of the image to achieve this.
The edges of the uplift area are brighter due to light from the pond of \
mirrors
Notes
DMD
1
   
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Edge Blend procedure (continued)
8. Blend the images.
Set Edge Blend > Blending to On for 
each projector to activate s-curves in the 
blend regions.
Once blending is activated, use test 
patterns to detect irregularities within the 
blend and to correct them.
What test patterns to use
• Use White Field (recommended) 
and/or Grey H Bars, if you are 
blending horizontally aligned images, 
and Grey V Bars, if the images are 
vertically aligned.
What irregularities to look for
• The blend region might be darker 
than the rest of the image 1.
How to correct
• Adjust the Edge Blend > S-Cur ve 
Value setting until the blend region 
is the same as the rest of the image.
Notes
1
   
Digital Projection HIGHlite 660 3D Series 
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