Graphics Programs Reference
In-Depth Information
When to use Edge Detection
In the Refine Edge dialog box, you have an option of turning on Edge Detection. Edge Detection works on
the entire image, and can be helpful when you select something furry or an overall texture on all sides.
However, this tool is not appropriate for images that have varying amounts of texture and smoothness on the
edges.
Edge detection allows you to set an amount, or radius, that determines the distance around the edge of your
selection that you would like to refine. For a dog with long fur, this would be a larger amount. For a tennis
ball, this might be a smaller amount.
Smart Radius automatically adjusts the radius for hard and soft edges found in the border region. Deselect
this option if the border is uniformly hard or soft-edged, or if you want to control the Radius setting and re-
finement brushes more precisely.
A furry dog requires a larger radius.
The result.
A smoother surface, such as this tennis ball, requires a smaller radius.
The result.
Going beyond the Magic Wand
The Magic Wand is the old standby tool for making quick selections. You typically can't use it to create
an excellent selection on its own, but it is a great tool for starting your selection.
