A method 700 for alignment of a lens of a camera with the sensor of a camera comprises: determining 702 at least a first shape and projecting 704 the at least one first shape onto the lens of the camera to facilitate alignment of the lens with the camera sensor. The at least one first shape is determined such that it generates at least one predetermined second shape at the camera sensor when the first shape is projected onto the lens. A similar method which comprises the use of a first pattern of shapes is also disclosed. A principal point of the camera may be determined 710 according to the geometric centre of projections of the first shape(s) in an image. Additional shape(s) may be projected 712 on to the lens at a position corresponding to the principal point. This may be used to determine 714 the effective focal length of the lens. A modulation transfer function may be used. The alignment and focal length determinations may be used for calibration of the camera lens.
Systems and methods for camera alignment using pre-distorted targets
2023-01-04
Patent
Electronic Resource
English
IPC: | G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen |
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