DIGITAL IMAGE ACQUISITION DEVICE WITH BUILT IN DUST AND SENSOR MAPPING CAPABILITY

摘要

A digital image acquisition device has an image acquisition sensor, a shutter, an aperture and optical elements for focusing an image on the sensor. The device includes a light source located in the body of the device. The light source is periodically activated with one of the aperture or shutter closed, and the device derives a map of defects on the surface of the sensor from a calibration image acquired by the sensor when illuminated by the light source.