Super–Resolution Restoration and Image Reconstruction for Passive Millimeter Wave Imaging

According to blackbody radiation theory [1], all substances at a finite absolute temperature will radiate electromagnetic energy. Passive millimeter-wave (PMMW) imaging system forms images by detecting the millimeter-wave radiation energy from the scene and utilizing the differences of the radiation intensity[2,3]. Although such imaging has been performed for decades (or more, if one includes microwave radiometric imaging), new sensor technology in the millimeter-wave regime has enabled the generation of PMMW imaging at video rates and has renewed interest in this area. Clouds and fog are effectively transparent to millimeter-wave and the cold sky is reflected by metallic objects on the ground making PMMW images similar to infrared (IR) and visible images. Due to being able to perform well under adverse weather conditions, PMMW imaging offers advantages over IR and visible imaging. It is widely used in airport security, scene monitoring, plane blind landing, medical diagnosis and environmental detection, et al [4-8].