Passive Millimeter Wave Image PSF Estimation And Super-resolution Algorithm

Passive millimeter wave imaging is a means of millimeter wave radiation ofobjects based on the detection of natural scenes imaging method for imaging the targetscene. Imaging techniques have been developed for decades, optical and infraredimaging is widely used due to its higher image resolution. However, due to the effectsof weather, optical and infrared imaging can not be the scene of the low visibilityimaging. This reflects the advantages of passive millimeter wave imaging. Theadvantages of this imaging technology is mainly reflected in: the day and night at thesame time the target scene imaging, still able to detect the target in adverse weatherconditions; In addition, more passive millimeter wave imaging is a passive imagingsystem, hidden performance and would not the body to radiation damage. As a result ofthe above series of advantages, passive millimeter wave imaging technology has beenwidely applied in the occult target of investigation, airport security, monitoring ofground-based navigation and anti-terrorism military and commercial areas.At present, due to the late start in the field of passive millimeter wave imaging,there is a certain degree gap with foreign theoretical foundation is weak, the overalldesign of the system will have an impact. In addition, the imaging system, there is animage of the point spread function estimation problem of inaccurate, a serious impacton the final image restoration. In order to solve the above problems, the paper thetheoretical analysis, the system of blind image restoration and super-resolutionalgorithm for passive millimeter wave imaging system. Mainly the following aspects:1． Through theoretical analysis of passive millimeter wave imaging radiometerprinciple, a summary of the structural characteristics of the imaging system, a certainsense in the overall design of the system.2． The theoretical analysis by a scanning mechanism of the antenna, based onstaring focal plane antenna, final analysis of the millimeter wave imaging principle.3． Analysis of passive millimeter wave imaging process antenna scan for antennascanning process motion blur Restoration Algorithm Based on Cepstrum finally got the expected point spread function, after super-resolution processing step to prepare.4． The use of millimeter wave image has been estimated point spread function, themethod of projection onto convex sets based by adding the adaptive regularization,research the adaptive regularization convex set projection super-resolution algorithm,has finally been better super-resolution effect.