Autotek autocad raster design 2010 用户手册
14 Click the Add Points button to match source points to the grid of
destination points.
The Grid Parameters dialog box disappears and ProdNameShort
automatically pans to the first destination point.
automatically pans to the first destination point.
NOTE You can select points on specific raster entities by using raster snaps.
15 Do one of the following:
■
Click to enter a corresponding source point for the current destination
point.
point.
■
Type a to anchor the selected point where it is.
■
Type s to skip to the next destination point. ProdNameShort will
return to this point when the other destination points have been
matched to source points.
return to this point when the other destination points have been
matched to source points.
■
Type u to undo the point and select the point again.
ProdNameShort automatically pans to the next point until all of the
destination points have been matched to source points.
ProdNameShort automatically pans to the next point until all of the
destination points have been matched to source points.
16 If you selected Polynomial as the transformation method, and you entered
six or more control points, you can adjust the polynomial Degree value.
This decreases error by increasing the degree to which an image can be
transformed in order to match control points.
transformed in order to match control points.
NOTE It is a good idea to use the lowest possible polynomial degree that
will still give you an acceptable result. Higher polynomial degrees result in
smaller errors at the control points, but also result in more warping at places
where there are no control points.
will still give you an acceptable result. Higher polynomial degrees result in
smaller errors at the control points, but also result in more warping at places
where there are no control points.
17 If you want to view a specific point, select that point from the list of
control points, and then click the Zoom To button to view the point in
the drawing.
the drawing.
18 If you want to adjust a specific point, select that point from the list of
control points, and then click the Repick button to enter a new control
point.
point.
NOTE Select the Auto Zoom check box if you want AutoCAD to zoom in to
the selected control point when you use Repick.
the selected control point when you use Repick.
36 | Chapter 2 Inserting and Correlating Images