Patent ID: 7724301
Filing Date: 2010-05-25
Classification: G03B,H04N

Abstract:
1. An apparatus, comprising: a mechanical shutter, configured to provide a predefined exposure of an image, said predefined exposure is defined by a global reset time and a closing time of the mechanical shutter; and an image sensor with a rolling shutter capability, responsive to said predefined exposure, configured to provide an image signal comprising a calibration image signal and an actual image signal by a rolling readout of said image, wherein the calibration image signal is provided by the rolling readout of a predetermined portion of the image using a predetermined calibration area of the image sensor during a time interval between times corresponding to minimum and maximum tolerance values of said predefined exposure for determining, using a predetermined criterion, said closing time of the mechanical shutter using said calibration image signal for compensating of the actual image signal, wherein said predetermined calibration area does not overlap with an area of the image sensor used for providing said actual image.