Non-uniformity correction calibrations in infrared imaging systems and methods

A method comprising:

• capturing, by an imager of an imaging device, a first set of infrared images of a reference object using a first integration time;
• capturing, by the imager, a second set of infrared images of the reference object using a second integration time different from the first integration time;
• capturing, by the imager, a third set of infrared images of the reference object using a third integration time;
• capturing, by the imager, a fourth set of infrared images of the reference object using the third integration time;
• determining the first integration time based on the third integration time and the fourth set of infrared images;
• determining a dark current correction map based on the second set of infrared images;
• generating a non-uniformity correction map based on the dark current correction map and the third set of infrared images;
• and
• determining a frame rate based on the first integration time and/or the third integration time, wherein the first, second, and third sets of images are captured according to the frame rate, and wherein the second integration time is lower than the first integration time and the third integration time.

An infrared imaging system comprising:

• an infrared imager configured to:
• capture a first set of infrared images of a reference object using a first integration time;
• capture a second set of infrared images of the reference object using a second integration time different from the first integration time;
• and
• capture a third set of infrared images using a third integration time;
• and
• a logic device configured to:
• determine a frame rate based on the first integration time and/or the third integration time, wherein the first set, second set, and/or third set of images are captured according to the frame rate;
• determine a dark current correction map based on the second set of infrared images;
• and
• generate a non-uniformity correction map based on the dark current correction map and the third set of images.