The accurate image-edge definition enables viable correction of geometrical distortion in stand-alone MR diagnosis and treatment planning.
According to the invention, a 2D data set, which is impaired by a non-reproducible geometric error during the scan, is determined.
The result of said comparison is used to alter the projection matrices of the scan in such a way that non-reproducible geometric errors occurring during the scan are compensated.
The mirror may also provide a geometrically distorted image that may be corrected in software of the image generator.
System and method for correcting geometric distortion in a multi-camera flat panel X-Ray detector.
A three-dimensional grid (10) is used as a phantom for mapping geometric distortion in magnetic resonance imaging (MRI) apparatus.
A three dimensional (3D) magnetic resonance imaging (MRI) system (100) performs object-induced geometric distortion correction.
The derived phase shifts are retrospectively applied to the EPI measurement for correction of geometric distortion in the measurement itself.
Platinum and palladium compounds with geometrically distorted charge transfer state, applications and methods for the preparation thereof.
The imaging lenses are designed to have the same field of view but different geometric distortion as a function of field of view.
A selection signal is also incorporated with the widescreen picture signal, allowing non-widescreen television receivers to display a contiguous portion of the widescreen picture without geometric distortion.
The decoder allows the entire widescreen picture to be displayed on a widescreen receiver, and makes use of the selection signal to display the selected portion of the picture on a standard receiver without geometric distortion.
In anoter embodiment, a decoder allows television signals having the standard aspect ratio to be displayed on receivers having widescreen aspect ratios without geometric distortion.
In the projection television set according to the invention, the images of three monochromatic colour picture tubes (2, 3, 4) are influenced in such a way that these attain congruence whilst avoiding geometric distortion on a screen.
One of the principle technical difficulties for obtaining a good-quality image (51) consists of correcting for the geometric distortion essentially introduced by the collimating and superposition optics (2, 3) of the display.
A compactor (110,fig.1) obtains spatial transformation parameters along with geometric and optical distortion parameters and combines them to form hybrid grid data in a hybrid vector space.
The calibration of an imaging system is adjusted for geometric distortion of an image formed by a group of imaging channels on a media supported on a media support.
This ensures in principle that actual scan lines in the direction of a first dimension are always consistent with the direction of movement of the first dimension, and that geometric distortion will not be found in scanned images.