Page 45 - CC2017_WD_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
pixels around the edge that are affected. Higher radius values (up to 250 pixels)
improve the edge in areas of fine detail.
• Smooth reduces the number of points that make up your selection and, as the
name suggests, makes a smoother edge. You can set smoothness from 0 (very
detailed selection) to 100 (very smooth selection). Note:
• Feather softens the selection edge, resulting in a transition that does not have
a hard edge (in other words, blends into the background). You can feather the It might help to work
selection up to 250 pixels. with a closer view while
you refine edges. You can
• Contrast is the degree of variation allowed in the selection edge. Higher Contrast
values (up to 100%) mean sharper selection edges. use the Zoom and Hand
tools in the Refine Edge
• Shift Edge shrinks or grows the selection edge by the defined percentage (from dialog box to change the
–100% to 100%).
image view behind the
• Decontaminate Colors (accessed by expanding the Advanced Output Settings open dialog box.
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.

9. At the bottom of the Properties panel, expand the Output Settings section.

10. Choose the Layer Mask option in the Output To menu.
This menu can be used to create a new layer or file (with or
without a mask) from the selection. You want to mask the
existing layer, so you are using the Layer Mask option.

Rather than simply deleting the unwanted background area,
another option for isolating an object with a path is to create a
layer mask that hides the unwanted pixels. Areas outside the mask are hidden but not
deleted, so you can later edit the mask to change the visible part of the image.

Project 1: Composite Movie Ad 55