Re: Enhancing Perspective correction
Perspective distortion (also called keystone distortion) is a common problem. It is especially apparent in pictures with dominant vertical lines & shapes. The distortion is caused by the camera's digital sensor (the focal plane) not being parallel to an object's surface and/or not level with the center of the object. If you shoot horizontally and level (perpendicular) with the center of an object, its vertical lines will appear straight. If the camera is tilted up, they will bend inward towards the top of the picture. If the camera is tilted down, they will bend inward towards the bottom of the picture.
Typical scenes with perspective distortion problems:
* Outdoor photography: Slanted trees, telephone poles, fence posts.
* Architectural photography: Leaning buildings & structures.
* Indoor photography: Tilted walls, skewed furniture.
Sometimes perspective distortion is unavoidable because of shooting situations or locations, sometimes it's actually desirable for the dramatic visual effect.
thanks
Last edited by Hoang-Tran : 27.03.2011 at 18:47.
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