Autotek autocad raster design 2010 用户手册
2 Pick a minimum of three points around the raster data you want to
preserve.
3 Right-click and click Enter to close the polygon.
Quick Reference
Menu
Image ➤ Crop ➤ Polygonal Region
Raster Design Toolbar
Command Line
icroppoly
Aligned Rectangular Cropping
Remove all the raster data outside a rectangular region that is aligned at any
angle, while preserving the rotation angle of the original image.
angle, while preserving the rotation angle of the original image.
To crop raster data outside an aligned rectangle
1 Click Image menu ➤ Crop ➤ Aligned Rectangular Region.
2 Pick a point at one corner of the raster data you want to preserve.
3 To define the baseline, pick a second point or enter a numeric angle in
relation to horizontal.
4 Pick a third point to define the final size of the rectangular region to
preserve. The image is cropped to this region, but the image frame retains
the angle of the original image at the time the crop was made.
the angle of the original image at the time the crop was made.
Quick Reference
Menu
Image ➤ Crop ➤ Aligned Rectangular Region
148 | Chapter 6 Modifying Images