You can clip and display
specific portions of a raster image in a drawing with a clipping
boundary.
With
a clipping boundary, only the parts of the image that you want visible are
displayed. You can define the part of an image that you want to
display and plot by clipping the image with IMAGECLIP. The clipping
boundary can be a polyline, rectangle, or a polygon with vertices
within the boundaries of the image. You can change the boundary
of a clipped image.You can also delete the clipped boundary of an
image. When you delete a clipping boundary, the original image is
displayed.
You can invert the area
to be hidden, inside or outside the clipping boundary. With grips
located at the midpoint on the first edge of the clipping boundary,
you can invert the display of the clipped reference inside or outside
the boundary.
With
IMAGEFRAME system variable, you can control the visibility of the clipping
boundary.
To clip an image
- Select the image to clip by selecting
the image boundary.
- At the Command prompt, Enter n (New
Boundary).
- Enter p (Polygonal)
or r (Rectangular), and then draw
the boundary on the image.
If you are drawing a
polygonal boundary, you are prompted to specify consecutive vertices.
To finish drawing a polygon, press Enter or right-click anywhere
in the drawing area.
To invert the clipped image
- Set IMAGEFRAME, to 1. This displays the
clipping boundaries.
- Select the clipped boundary. You should
see the grip at the midpoint on the first edge of the clipped boundary.
- Click the grip to invert the current
x-clip region. The grip now points the other way.
To change the boundary
of a clipped image
- Select the image to clip by selecting
the image boundary.
- Enter n (New Boundary).
- Enter n (No) or y (Yes)
to delete the old boundary.
- Enter p (Polygonal)
or r (Rectangular), and then draw
the new boundary on the image.
If you are drawing a
polygonal boundary, you are prompted to specify consecutive vertices.
To finish drawing a polygon, press Enter or right-click anywhere
in the drawing area.
You can modify clipped
boundaries with grips. See Edit Objects with Grips.
To show or hide the clipped
portion of an image
- Select the clipped image you want to
show or hide.
- Right-click in the drawing area. Click
Properties.
- In the Properties palette, select Yes
or No in the Show Image list.
To delete the boundary
of a clipped image
- Select the clipped image with the boundary
you want to delete.
- Enter d (Delete).
The boundary of the clipped
image is deleted, and the original boundary of the image is restored.
CommandsIMAGECLIP
Crops the display of
a selected image to a specified boundary.
PROPERTIES
Controls properties
of existing objects.
System VariablesIMAGEFRAME
Controls whether image
frames are displayed and plotted.
