Patent ID: 8451356
Filing Date: 2013-05-28
Classification: H04N

Abstract:
1. A method for correcting luminance disturbances in an imaging device, the method comprising: reading pixel data output from a CMOS imager, wherein the CMOS imager captures images by sequentially capturing pixels of an image; detecting a beginning of a luminance disturbance in the image by detecting a sudden gain in luminance level, wherein the sudden gain in luminance level is characterized by a relative increase in luminance level that is greater than a predetermined gain value output from the CMOS imager that are separated in time by not more than a predetermined time value; detecting an ending of the luminance disturbance in the image by detecting a sudden loss in luminance level, wherein the sudden loss in luminance level is characterized by a relative decrease in luminance level that is greater than a predetermined loss value output from the CMOS imager that are separated in time by not more than the predetermined time value; providing a signal to a digital signal processor (DSP) that the luminance disturbance was detected in the output of the CMOS imager before the DSP begins processing the output of the imager, the signal including information about the beginning and ending of the luminance disturbance in the image; and correcting the output of the DSP to compensate for the luminance disturbance.