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13. Alignment
13.8.4 Warp adjustment principle
Description
Warping adjustment enables the
relocation of pixel groups
in an image in order to introduce spacial distortion. To make the
procedure comprehensible, there are some rules and features.
The use of warping adjustment leads to image quality loss! The more geometry adjustment is applied, the
more quality loss.
Moving an anchor point causes pixels in the same region to be moved gradually with this one pixel, depending on their distance to
it. The size of the region of impact depends on the anchor point: some anchor pixels have impact on the full image, while others
have impact on a small area only. The full image is divided in
33 x 33 regions
. The smallest region of impact is one of these 1089
regions.
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Image 13-32
33 x 33 regions in an image
Warp adjustment is divided in
six modes
:
•
2 x 2 (highest mode);
•
3 x 3;
•
5 x 5;
•
9 x 9;
•
17 x 17;
•
33 x 33 (lowest mode).
The six modes represent
21 levels
, each level representing its own group of
anchor points
.
Level 2 Level 3
Level 7 Level 8 Level 9
Level 4 Level 5 Level 6
Level 10
Level 11 Level 12 Level 13
Level 16
Level 14 Level 15
Level 17 Level 18
Level 19 Level 20
Level 21
Level 1
2 x 2
3 x 3
5 x 5
9 x 9
17 x 17
33 x 33
Image 13-33
Level hierarchy
The
hierarchy
of these levels is very important: each level interacts with all lower levels. Adjusting a point on a certain level affects
the points in all or some of the lower levels. The impact depends on the level itself. Therefore it is important to adjust the geometry
starting from level one and going down to lower levels as required. In practice it will not be needed to adjust the anchor points of
levels 7 and lower.
R5905303 HDQ 2K40 02/03/2015
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Summary of Contents for HDQ--2K40
Page 1: ...HDQ 2K40 User and Installation manual R5905303 09 02 03 2015 ...
Page 4: ......
Page 10: ...Table of contents 6 R5905303 HDQ 2K40 02 03 2015 ...
Page 18: ...1 Safety 14 R5905303 HDQ 2K40 02 03 2015 ...
Page 54: ...4 Input Communication 50 R5905303 HDQ 2K40 02 03 2015 ...
Page 78: ...6 Getting started 74 R5905303 HDQ 2K40 02 03 2015 ...
Page 118: ...9 Input 114 R5905303 HDQ 2K40 02 03 2015 ...
Page 148: ...10 Image 144 R5905303 HDQ 2K40 02 03 2015 ...
Page 166: ...11 Layout 162 R5905303 HDQ 2K40 02 03 2015 ...
Page 176: ...12 Lamp 172 R5905303 HDQ 2K40 02 03 2015 ...
Page 302: ...15 Service 298 R5905303 HDQ 2K40 02 03 2015 ...
Page 318: ...17 Removal and installation of the projector covers 314 R5905303 HDQ 2K40 02 03 2015 ...
Page 322: ...A Specifications 318 R5905303 HDQ 2K40 02 03 2015 ...
Page 326: ...B Standard source files 322 R5905303 HDQ 2K40 02 03 2015 ...
Page 330: ...C DMX chart 326 R5905303 HDQ 2K40 02 03 2015 ...
Page 334: ...D Environmental information 330 R5905303 HDQ 2K40 02 03 2015 ...