Distortion of a projected image on a screen, where the image is wider on top and narrower on bottom. The image distorts from a rectangle into a trapezoid because the projector is above or below the center point of the screen; either the top or the bottom become wider because it is further away from the lens. To adjust for keystoning, the top of the screen can be tilted a little, either forward or back. Many data projectors allow you to tilt the lens to solve the problem.
The distortion of an uncorrected image projected on a wall or screen, typically shown to be wider across the top and shorter across the bottom, resembling a keystone of an arch.
Image distortion caused when the projector is not perpendicular to the screen, making the image noticeably wider at the top or bottom. Some projectors have keystoning correction functions. To correct keystoning manually, tilt the screen or the projector until the screen is perpendicular to the projectorÕs light beam axis. See also Focus Correction.
The "wedge" shape picture caused when the projector is not even with the horizontal or vertical center of the middle of the screen. Most data and video projectors use optical and electronic methods to eliminate this problem. The picture 'keystones' like the keystone in an arch.
This is when the projected image is geometrically distorted due to a discrepancy between the projector's axis and the angle of the display screen.
A form of video image distortion in which the top of the picture is wider than the bottom, or vice versa. The image is shaped like a trapezoid, rather than a rectangle.
'Keystone' distortion is caused when the projected image is not perpendicular to the screen. If the top of the screen is further from the projector lens than the bottom, the image takes on a distracting 'wedge' or keystone shape. Many LCD projectors provide built-in electronic keystone correction to ensure a correct rectangular image. With an OHP, it can be avoided by tilting the screen so it is perpendicular to the projected beam.
This is when the projected image is not square/rectangular shaped. The top and bottom are different lengths giving a trapezium shape.
Keystoning is caused when the projected image is not perpendicular to the screen, making the top and bottom of the image different lengths.
Keystoning is caused when the projected image is not perpendicular to the screen. Correct keystoning by tilting the screen until it is perpendicular to the light beam axis.
most movie slide advertising programs project ads from a slight angle, causing a projection distortion known as "keystoning." The effect causes an image to become slightly skewed when projected a long distance through a curved lens. Images that have hard edges or borders accentuate the keystoning effect and therefore are not allowed on USM slide ads.
Automatic keystoning is a projector feature that creates a uniform image top to bottom by correcting the image if it's projected onto the screen at an angle. Today several projectors will keystone correct up and down and side to side.
Keystoning is caused when the projected image is not perpendicular to the screen, making the image appear wider at the top than bottom.
A geometrical image distortion resulting when a projected image strikes a plane surface at an angle other than perpendicular to the axis of throw, or when a plane surface is photographed at an angle other that perpendicular to the axis of the lens.
Optical distortion of a picture, especially apparent in parallel lines, due to shooting subject matter at an angle not perpendicular to lens axis.
Converging verticals can make a building appear to be falling down (wider at the bottom than the top), this can be corrected by making sure the film plane is parallel to the photographed surface using either a Shift Lens or camera movements. It can also be corrected within Photoshop. Keystoning is also the term for the effect of a tilted (up or down) projector. (see: Camera movements, Converging angles, Movements, Photoshop, Rising front & Shift )
Distortion of a projected image when the projector is not directed perpendicular to the screen.
As an image is projected onto a screen or wall, the angle created can make your projected image appear to be narrower on the bottom than at the top. A few (not most) projectors today have an automatic keystone correction feature to create a uniform image top to bottom. Some projectors can manually adjust this characteristic while others provide only a fixed correction with no further flexibility.
The distortion (usually a wide-top narrow-bottom effect) of a projected image caused by a projector "pointing up" or "pointing down" at its screen. Named after its similarity in shape to the keystone used in constructing an arch. LCD AKA liquid crystal display. This technology comes in many forms, sizes, and resolutions. Its primary purpose is to present a digital image for viewing. They are used in many notebook computer displays and also used as technology inside a projector to project high-resolution digital images.
Distortion of a projected image that results when the lens is not directly aligned with the visual center of the screen
The distortion of a projected slide or movie caused by the projector lens axis not being at a 900 angle to the screen. The image will appear wider on one edge than on the opposite and the image will not be uniformly sharp.