Graphics Programs Reference
In-Depth Information
Lens Correction
The Lens Correction filter is designed to fix common flaws in an
image (such as barrel distortion, lens vignettes, and chromatic
aberration). The filter can be run on 8- or 16-bit-per-channel
images that use the RGB or Grayscale image mode. The filter can
also correct perspective problems caused by camera tilt.
1.
Close any open files, and then open the file Ch11_Lens_
Profile.tif from the Chapter 11 folder.
2.
Choose Filter > Convert for Smart Filters to ensure flexibility
in editing.
3.
Choose Filter > Lens Correction.
A new window opens. Look in the bottom-left corner for
information about the camera and lens used for the shot (this is
included in the metadata the camera wrote to the original file).
4.
Choose a manufacturer from the Camera Make menu. In this
case choose Nikon Corporation.
5.
From the Camera Model menu, choose the correct camera
model. In this case just choose Nikon D300s.
6.
From the Lens Model menu, choose the correct lens. The
closest match is the 17.0-70.0 mm f/2.8-4.5.
7.
Switch to the Custom tab for advanced controls.
8.
Click the Show Grid option at the bottom of the window.
Let's compensate for the low angle, which is causing some
keystoning.
9.
Set the Vertical Perspective to -50.
