User Guide

Chapter 8 Editing
89
Correcting barrel, pincushion, and fisheye distortion
You can use the Distortion Correction tool to correct barrel, pincushion, and fisheye distortion in
digital photographs. In barrel distortion the photo appears to bulge outwards from the center. In
pincushion distortion the photo appears to shrink inwards toward the center. In fisheye distortion, the
photo appears to bulge outwards from the center, as if the photo were wrapped around a sphere.
Barrel, pincushion, and fisheye distortion are common in photos that were taken with wide angle or
zoom lenses.
To correct barrel, pincushion, or fisheye distortion:
1 In Edit Mode, on the Edit Panel, click Lens Correction.
2 On the Edit Panel, click Distortion Correction.
3 In the Type of Distortion section, select Barrel, Pincushion, or Fisheye.
4 Set the options as described below.
5 Do one of the following:
•Click Done to apply your changes and close the tool.
•Click Cancel to discard all changes and close the tool.
Distortion Correction options
Horizontal center Drag the slider to the left or right to identify the center of the image
on the horizontal axis.
Vertical center Drag the slider to the left or right to identify the center of the image
on the vertical axis.
Correction strength Drag the slider to the right until the objects in the photo appear to be
straight.
Scale Drag the slider to the left or right to change the scale of the photo.
Background color When you correct distortion in a photo, the edges of the photo may
bulge outwards or shrink inwards. Use the Background color
options to fill gaps in the corners or sides of a corrected photo. Select
Image if you want to fill gaps in the corners or sides of a corrected
photo by placing the uncorrected photo in the background. This is
useful if the gaps are small.
Show Grid Select this option if you want to display a grid over the photo while
you correct distortion. This is useful if you want to assess whether
objects in the photo are straight.