The Crop tool has an option
that lets you transform the perspective in an image. This is very
useful when working with images that contain keystone distortion. Keystone
distortion occurs when an object is photographed from an angle rather than
from a straight‑on view. For example, if you take a picture of a
tall building from ground level, the edges of the building appear
closer to each other at the top than they do at the bottom.
Steps to transform perspective
A.
Draw initial cropping marquee
B.
Adjust
cropping marquee to match the object’s edges
C.
Extend
the cropping bounds
D.
Final
image
Select the Crop tool and
set the crop mode.
Drag the cropping marquee around an object that was rectangular
in the original scene (although it doesn’t appear rectangular in
the image). You’ll use the edges of this object to define the perspective
in the image. The marquee doesn’t have to be precise—you’ll adjust
it later.
Important: You must select an object that was
rectangular in the original scene or Photoshop might not produce
the perspective transformation you expected.
Select Perspective in the options bar, and set the other
options as desired.
Move the corner handles of the cropping marquee to match
the object’s edges. This defines the perspective in the image, so
it is important to precisely match the object’s edges.
Drag the side handles to extend the cropping bounds while
preserving the perspective.
Do not move the center point of the cropping marquee. The
center point needs to be in its original position in order to perform
perspective correction.
Do one of the following:
Press Enter (Windows) or Return
(Mac OS), click the Commit button in
the options bar, or double-click inside the cropping marquee.
To cancel the cropping operation, press Esc or click
the Cancel button in the
options bar.
Comments
Comments are no longer accepted for Photoshop CS3. Photoshop CS4 is the current version. To
discuss Photoshop CS3, please use the Adobe forum.
Comments
jimtypes
said on
Oct 8, 2008
at
10:35 AM :
Question about CROPPING - how do you get the PERSPECTIVE option on the taskbar to be usable? (not in grey and uncheckable) I need it but can't get to it....
and
set the crop mode.
in
the options bar, or double-click inside the cropping marquee.
in the
options bar.
Comments
Comments are no longer accepted for Photoshop CS3. Photoshop CS4 is the current version. To discuss Photoshop CS3, please use the Adobe forum.