convex hull menu

This menu lets you create convex hulls from the objects in a vector image. The convex hull of an object is the smallest
convex object that contains all the vertices of the original object. The effect is that of wrapping a string around the
object, and pulling it tight. The procedure is as follows:
- Enter the name of the vector file in the Vector image file menu field.
- To create the new vector image using the same name as the original image, click on
MAKE CONVEX HULL IMAGE, NEW VERSION.
- To create the new vector image using a new name, enter the name in the New name
menu field, and click on MAKE CONVEX HULL IMAGE, NEW NAME.