keystone correction

基本解释

Vertical keystone correction.
垂直梯形校正。
A new method which using two order keystone transform to correct quadratic migration and frequency domain correction to correct once migration was proposed.
提出了一種新的解決方法，即利用二堦Keystone變換補償時間二次項，然後用頻域校正算法補償時間一次項。

Furthermore, the projector offers an auto V-Keystone Correction button to automatically activate in response to the installation angle of the projector.
ENGADGET: Sharp shows off the XV-Z15000 1080p projector
To maintain an accurate image, the XV-Z15000 includes Keystone Correction, which corrects spherical, cylindrical and trapezoidal distortion of an image on a flat screen.
ENGADGET: Sharp shows off the XV-Z15000 1080p projector
It is also equipped with Easy-Slide image correction, an intuitive horizontal keystone adjustment slide control bar allowing users to place the projector off-center from the screen and easily center the image with the touch of a finger.
ENGADGET: Epson adds the Home Cinema 750HD to its line of home theater projectors, ships in March for $899