How to Fix Perspective Problems in Photoshop
When you take a photograph of a moderately tall tree, building, or other structure, there’s a good chance the image will have some degree of keystone distortion.
Keystone distortion occurs when an object is photographed from below rather than straight on. For example, if you take a picture of a tall building from ground level, the edges of the building will appear closer to each other at the top than at the bottom.
You can eliminate this problem in Photoshop by using the Crop tool.
Select the Crop tool
Drag the cropping marquee around an object that was rectangular in the original scene (although it doesn’t appear rectangular 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 you might not get the perspective transformation you expected.
Select the small Perspective button in the Options bar. (Experiment with other options to get the results you want.)
Move the corner handles of the cropping marquee to match the object’s edges. It’s crucial to match the object’s edges precisely.
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:
To accept the transformation: Press Enter (Windows) or Return (Mac OS), click the checkmark button in the Options bar, or double-click inside the cropping marquee.
To cancel the cropping operation, press Esc or click the slashed circle button in the Options bar.
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