Fixed pattern noise removal in CMOS imagers across various operational conditions

A method of minimizing noise in an image produced by an electronic imager comprising:

• generating a correction system having a range of imager integration times and a range of imager temperatures for an electronic imager which has taken a series of dark capture images and a series of flat field capture images in a calibration mode;
• applying said correction system to a plurality of images having different integration times or imager temperatures produced by said electronic imager in an image capture mode without reentering the calibration mode;
• wherein said electronic imager has three different color channels and wherein said correction system effects an aim response in each said color channel to which all pixels will be gained and per pixel gain is then computed;
• and
• said aim response is defined as the average of each color channel in the center region of the imager's format.

A method of minimizing noise in an image produced by an electronic imager having image capture pixels and dark pixels comprising:

• generating correction maps for a range of integration times, each map associated with different imager dark pixel values during a calibration mode;
• capturing a plurality of images and for each image adjusting the correction maps as a function of the captured image dark pixel values using regression at the time of image capture without reentering the calibration mode;
• and
• correcting each captured image with the adjusted correction maps.