Passive Millimeter Wave Radiometer Super-resolution Imaging Technique

Passive millimeter wave imaging makes use of the electromagnetic thermal emission of the subject and reflected thermal signals from the background. Passive millimeter wave imaging, in comparision to visible or infrared imaging ,has great potential advantage of imaging through fog, clouds, smoke, sandstorms and other poor weathter conditions.Current imaging systems relied on mechanical scanning of a single beam across the scene have problems of low spatial resolution and poor sensitivity. During the past several years, due to significant advances in the development of solid state components and high-speed signal processing technology, mufti-beam array imaging systems, which promise an increase in sensitivity and resolution, have received considerable interest in both the military and civilian applications.Firstly we discuss the common theory and principles of passive millimeter-wave imaging and analyze several qualification of it; secondly, imaging model of millimeter-wave image system and degradation cause of millimeter-wave image are enduced combining with the principle of millimeter-wave image system; thirdly, studying the method of millimeter-wave image. Starting with degradation cause of millimeter-wave image, we advance two kinds of millimeter-wave image super-resolution algorithm.