Image analysis – Image transformation or preprocessing
Reexamination Certificate
2008-05-27
2008-05-27
Kassa, Yosef (Department: 2624)
Image analysis
Image transformation or preprocessing
C382S260000, C382S274000, C382S275000, C358S003260, C358S003270
Reexamination Certificate
active
07379619
ABSTRACT:
A digital keystone correction process locates image points in a corrected image from image points in a distorted image that was produced by misalignment of the axis of a sensor such as a camera. The correction process locates corrected image points by constructing intercept points that are the intersections of the extended sides of a quadrilateral in the distorted image plane that is constructed from a known rectangular feature in the subject plane. Reference points are located by drawing a line through each intercept point and the distorted image point. Distances are found from the intercept points to the image points and the reference points. The distances are scaled and corrected with an offset to locate the coordinates of the image points in the corrected image plane. This process can correct alignment errors of pitch, yaw, and roll between the subject plane and an image plane such as photographic film.
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Ikeda Roger Mitsuo
Kempf Jeffrey Matthew
Brady III Wade James
Kassa Yosef
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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