Device for forming an image and method of correcting geometrical

Details Device for forming an image and method of correcting geometrical Device for forming an image and method of correcting geometrical

1995-12-20

1997-10-07

Peng, John K.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348247, H04N 5217

Patent

active

056753802

ABSTRACT:
The device includes systems for picking up (1), acquiring (2) and digitizing (3) a distorted source image (SI), a system for processing digital images (4, 47) for constructing a distortion-corrected target image (TI) corresponding to the source image (SI), this system including a first sub-assembly (4) for predetermining, on the basis of the data of a distorted TEST source image (SG.degree.), an optical center (OC.sup.n) and a polynomial function (F.sub.n) for correcting radial distortions around this optical center, and a second sub-assembly (47) which applies the polynomial correction function to each address of the pixel of the target image (TI) for furnishing the address of a point in the distorted source image (SI) in which an intensity data is present which is applied to the initial address in the target image. The method includes the computation, in a TEST source image (SG.degree.), of an optical center (OC.sup.n) at the center of optical distortions, and of a polynomial function (F.sup.n) for correcting distortions for constructing a TEST target image (TI).

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