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Image 17-16
33 x 33 regions in an image
Warp adjustment is divided in six modes:
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2 x 2 (highest mode);
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3 x 3;
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5 x 5;
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9 x 9;
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17 x 17;
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33 x 33 (lowest mode).
The six modes represent 21 levels, each level representing its own group of anchor points.
Level 4 Level 5
Level 7 Level 8
Level 11 Level 12 Level 13
Level 16
Image 17-17
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.
In 2 x 2 mode, we only have one level, including all four (2 x 2) anchor points, being the image corners. This mode is especially
used to correct horizontal and vertical keystone.
R5906730 HDF WLP SERIES 01/08/2017
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9
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11 12
13
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15 16
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2 x 2
Level 1
3 x 3
Level 2 Level 3
5 x 5
Level 6
Level 9
9 x 9
Level 10
Level 14
Level 15
Level 17 Level 18
Level 19
Level 20
Level 21
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25
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27 28
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17 x 17
33 x 33
17. Alignment
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