Radial Displacement Sample Clauses

Radial Displacement. All elevated features (buildings, trees, power lines) are subject to radial displacement. This causes the features to appear to lean, which can obscure data. One example might be a street behind a leaning building. Xxxxxxx makes ortho images by using the inner area of every photograph. This minimizes (but does not eliminate) radial displacement, which increases toward the outer area of an image. Power lines on either side of a seam line. Note how elevated features (trees, the power lines) lean in different directions in the two source photographs. This is acceptable, as features on the ground in this area are in their true position. Figure 3-1 When a seam line between two image frames comes in contact with elevated features, the effect may be aesthetically displeasing. Xxxxxxx uses sophisticated software to automatically routes seam lines to avoid buildings, and QC’s the results at every image intersection. However, forested areas and power lines will be impossible to eliminate lean and displacement. (Figure 3-1 & Figure 3-2). The seaming software selects the best source image frame to be used for an area, based on terrain, camera angle, and proximity to photo center. Any further manipulation of the seam line potentially may degrade the imagery. Therefore as a standard product, seam line placement is not open to review. Trees leaning in different directions, with different shadows from two source photographs. Xxxxxxx minimizes this by using the center of every photo, and only taking photography when conditions are optimal. Some differences, however, are unavoidable, and not considered cause for rejection. Figure 3-2