Effect of pixel active area shapes in microscanning based infrared super-resolution imaging

Super-resolution (SR) imaging is an effective and economical way to increase the image resolution in spite of the detector limitation, therefore is widely used in many infrared (IR) focal plane array (FPA) imaging application. The ideal square pixel active area (PAA) model is widely used in research of microscanning (MS) based IR SR imaging. However, according to the micrographs of practical IRFPA productions, the PAAs of these productions are actually not a strict square. Three different PAA shapes were analyzed to discuss their effect in MS based IR SR imaging, and experimental results were coincident to theoretical simulation. The results indicate that: using square PAA causes 41% inaccuracy in some limit cases; more closer the "Z shape" to rectangle, higher value of "Z shape" MTF; simulation model based detector active area shape can effectively improve accuracy for IR SP research.