WiseImage – User’s Guide
136
Floodfilling
Here the selection window is defined by the
same points as in the two previous cases.
However, using the
Floodfilling
selection type,
you select all raster object parts - the entire
raster, as shown in the figure, and the deletion
deletes everything.
Comparing
Within
Window
selection methods
As in the first example, in this example we will select a raster using the
Within
Window
method with different raster selection types.
When you select a raster with the
Within Window
method, you should click on two
opposite corners of a rectangular area. The program selects all raster data that lies
entirely inside the area, and then finds those raster objects that cross the area
boundary and removes them from the selection set.
The figures below show selected raster objects as outlines. The selection window is
displayed as a dashed rectangle.
Object Type Recognition
The program selects a character, circle and
rectangle that lie inside the selection window.
Note that the entire raster lines crossing the
selection window boundary are excluded from the
selection.
Line Following
When you use the
Within Window
method based on
the Line Following algorithm, the selection includes
raster character “A”, circle, rectangle and the parts
of raster lines between the raster rectangle and
circle.
The program does not select the parts of raster lines from the window boundary up
to their first nodes - where lines intersect the raster rectangle.