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US 6,147,702 AGranted
Calibration of digital cameras
AssigneeIntel Corporation
InventorRonald D. Smith
Life of this patent
Estimating the term…
Abstract
A lens cover for a digital camera provides a diffused light source for calibration purposes which approximates a flat field light source. In this way, digital cameras may be calibrated in the field under user control. The diffuser may be in the form of a light transmissive hologram. The hologram may have formed thereon a plurality of light diffusing shapes. The camera may be calibrated either by itself or advantageously when connected to a host computer. The user may be prompted through the calibration sequence.
Claims8
A digital camera comprising:
- a housing;
- an imaging lens contained in the housing;
- a diffuser to create the effect of a flat field source, said diffuser removably positionable in front of the lens;
- and
- a digital imaging device that converts an image into a digital signal representation of the image, said digital imaging device having a calibration mode in which said digital imaging device is calibrated for photo response non-uniformity using said diffuser.
2 more elements
A method of calibrating a camera having an imaging array comprising:
- securing a diffuser to the camera;
- emulating a flat field source using said diffuser;
- and
- implementing a calibration sequence using said emulated flat field source to calibrate the imaging array for photo response non-uniformity.
1 more element
Dependencies are inferred from the claim text.