Methods for enhancing quality of pixel sensor image frames...

Details Methods for enhancing quality of pixel sensor image frames... Methods for enhancing quality of pixel sensor image frames...

2008-04-23

2011-12-13

Jerabek, Kelly L (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

C348S243000, C257S292000

Reexamination Certificate

active

08077240

ABSTRACT:
The image quality of an image frame from a CMOS image sensor array operated in global shutter mode may be enhanced by dispersing or randomizing the noise introduced by leakage currents from floating drains among the rows of the image frame. Further, the image quality may be improved by accounting for time dependent changes in the output of dark pixels in dark pixel rows or dark pixel columns. In addition, voltage and time dependent changes in the output of dark pixels may also be measured to provide an accurate estimate of the noise introduced to the charge held in the floating drains. Such methods may be employed individually or in combination to improve the quality of the image.

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