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AssigneeNikon Corporation
InventorTsukasa Murata
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In a distortion correcting method for an image taken by an optical system, the invention makes it possible to increase the calculation accuracy of distortion of an image while reducing the amount of information to be prepared in advance. To this end, approximation information that is obtained when distortion aberration (A) of the optical system is approximated by a function (SA: A(f, d)) of a shooting condition (d, f) that is set in the optical system is prepared in advance, and distortion of an image taken by the optical system is calculated based on the shooting condition that was set when the image was taken and the approximation information prepared in advance. Though being small in information amount, this approximation information makes it possible to calculate distortion aberration under every shooting condition.
A distortion correcting method for an image taken by an optical system, comprising the operations of:
An interchangeable lens comprising:
A camera comprising an optical system including a processor that obtains approximation information when distortion aberration of said optical system is approximated by a continuous function with respect to a shooting condition that is set in said optical system is stored therein in advance, and when each of one or more coefficients of a function of a position in an imaging plane of said optical system that represents said distortion aberration is approximated by a function of at least one of a focal position and a focal length of said optical system,
A distortion correcting method for an image taken by an optical system, comprising the operations of:
Dependencies are inferred from the claim text.