Keystoning
The distortion of a projected slide or movie caused by the projector lens axis not being at a 90 degree angle to the screen. The image will appear wider at one edge than on the opposite and the image will not be uniformly sharp.
Keystoning
From Nikonians Wiki - FAQs, Photo Glossary, Good Photo Locations, Help
Jump to: navigation, search ...
Keystoning
in order fit a 3 x 4 frame you must step back further (if flat on) or closer but angled to cover the same subject
Kerning ...
KEYSTONING - Distortion of a projected image when the projector is not directed perpendicular to the screen.
Keystoning
Converging verticals can make a building appear to be falling down (wider at the bottom than the top), ...
Keystoning
The apparent "unparalleling" of parallel lines as a result of not shooting a building or framed picture at a perpendicular (90°) angle. The same phenomenon can occur with projected images.
Keystoning happens when the projector is not centered on the screen.
One of the ironies in digital photography is that although it makes it easier and less expensive to display images to millions of people one on one, ...
Keystoning - A distortion, typically of a projected image, where the sides of the image appear to narrow at either its top or bottom.
...
Before - Keystoning
© Tony Sweet
All Rights Reserved
I've been living with image keystoning (converging lines when pointing upwards) since I first began photographing.
Corrected for keystoning and barrel distortion.
Correcting Perspective
Correcting Lateral Chromatic Aberration and Color Fringes ...
Keystoning 2. Framing 3. High keying 4. Desegregation 4-44. Which of the following techniques can you use to separate the subject from the foreground or background? 1. A large f/stop 2. Pan the subject 3. Move in closer to the subject 4.
[1] With a triple-extension bellows 4" x 5" camera such as the Linhof SuperTechnika V, the photographer can correct certain distortions such as 'keystoning', where the image 'lines' converge (i.e.
You can correct some converging lines (keystoning) in Photoshop but it always distorts the image to a certain extent. It is easy in that the subject doesn't move, but you have to really know composition and perspective. --Andrew ...
The distortion is evident with the presents appearing much bigger than they really were. I corrected some of the keystoning using Photoshop.
I then mounted the camera to a tripod and raised it to where the lens was the same height as the center of the painting to prevent any linear distortion, or "keystoning", from occurring (figures 1 & 2).
You can sometimes squeeze things in with a wide-angle lens (24mm or wider), but you must often tip the camera up to include the tallest parts, which produces an effect called keystoning, in which the buildings appear to be falling backward.
and if you enlarged the image enough you'll find some graininess (not too bad; after all, it is the 7D) and evidence of overall image blur due to camera movement. Also note that the artwork is at a slight angle and that there is some keystoning ...
 See also: Toning, Photograph, Image, Photography, Lens
  
|
RSS
