Graphics Programs Reference
In-Depth Information
This filter lets you fix three different kinds of problems: barrel/pincushion distortion,
vignetting, and perspective problems. These errors are the ones you're most likely to
run into, and correcting them is as easy as dragging sliders around. You may need to
make only one adjustment, or you may need many (the upcoming bulleted list helps
you decide which controls to use).
As you tweak these settings, watch the grid carefully to see how things are lining up.
When everything is straightened to your satisfaction, you're done. To start over, Alt-
click/Option-click the Cancel button (it changes to a Reset button) and return your
photo to the state it was in when you summoned this filter.
4.
If you wish, scale the photo
.
As you make adjustments, you'll probably notice some empty space appearing on
either side of the canvas (the background area of your file). This often happens when
Elements pinches and stretches a photo to correct distortion. To make things right,
you have two options: Click OK and then crop the photo yourself using any of the
methods you learned about starting on
Cropping Pictures
, or use the Correct Camera
Distortion dialog box's Edge Extension slider to enlarge the photo so it fills the image
window. If you use the second method, Elements crops some of the photo, and you
have little control over what it chops off. After all the effort you've put into using this
filter, you may as well do your own cropping to get the best possible results, so you
may not want to bother with the Edge Extension slider.
5.
Click OK to apply the changes
.
If you don't like the way things turned out, then reset your photo by Alt-clicking/
Option-clicking the Cancel button. If you just want a quick look at where you started
(without undoing your work), toggle the Preview checkbox on and off.
The Correct Camera Distortion filter gives you a few different ways to adjust images. Your
choices are divided into sections according to the kinds of distortion they fix:
▪
Remove Distortion
. Use this slider to fix
barrel distortion
(objects in your photo bal-
looning out, like the sides of a barrel, as shown in
Figure 11-9
) and its opposite,
pincush-
ion distortion
(your photo has a pinched look, with the edges of objects pushing in to-
ward the center). Move the slider right to fix barrel distortion or left to fix pincushion
distortion.
