5. On Non-uniformity Correction NUC Introduction: Modern imaging systems are ubiquitous 十分普遍 in a wide range of military and civilian applications including thermal imaging, night vision, surveillance systems, astronomy, fire detection, robotics, and spectral sensing and imaging. At the heart of most modern imaging systems is the focal-plane array (FPA), which consists of a mosaic of detectors positioned at the focal plane of an imaging lens. An FPA is any detector that has more than one row of detectors. For example, the smallest conceivable FPA detector would have a configuration of 2×2 detectors (two rows and two columns). This configuration is described by the term array. The focal plane of an optical system is a point at which the image is focused. Thus, in an FPA system, an array of detectors is located at a point where the image is focused. Typical infrared FPA systems have an array of 256×256 detectors or more. FPA detectors have high-resolution IR imaging capabilities. An array of detectors staring at the scene rather than a single detector being scanned across the scene means IR cameras can be much smaller, lighter, and more power efficient than a camera with moreelaborate scanning components. Modern infrared FPA systems have the portability of video camcorders and the imaging quality of black-and-white TV cameras.
Charlie Chong/ Fion Zhang
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