Page 71 - CC2017_PS_Look_Inside

8. Experiment with the adjustments in the Properties panel until you’re satisfied with
the selection edge.

You want to include a small amount of darkness around the edge so that when you
invert the selection to remove the hole in the wall, there is no light halo effect left by the
selection edge. We used the Shift Edge slider to slightly expand the selection edge.

• Radius (accessed by expanding the Edge Detection section) is the number of Note:
pixels around the edge that are affected. Higher radius values (up to 250 pixels)
improve the edge in areas of fine detail. It might help to work
• Smooth reduces the number of points that make up your selection and, as the with a closer view while
name suggests, makes a smoother edge. You can set smoothness from 0 (very you refine edges. You can
detailed selection) to 100 (very smooth selection). use the Zoom and Hand
• Feather softens the selection edge, resulting in a transition that does not have tools to change the image
a hard edge (in other words, blends into the background). You can feather the preview.
selection up to 250 pixels.
• Contrast is the degree of variation allowed in the selection edge. Higher Contrast
values (up to 100%) mean sharper selection edges.
• Shift Edge shrinks or grows the selection edge by the defined percentage (from
–100% to 100%).
• Decontaminate Colors (accessed by expanding the Output Settings section) can
be checked to remove a certain percentage of color from the edge of a selection.

The On White
preview shows the
selected area on a
white background.

The dark edge
should be easily
visible using the
On White preview.

Project 1: Composite Movie Ad 81