A5062232014- Terahertz technology and applications
- Advanced Image Processing Techniques
- Superconducting and THz Device Technology
- Image and Signal Denoising Methods
- Acoustic Wave Resonator Technologies
- Advanced Image Fusion Techniques
- Random lasers and scattering media
- Microwave and Dielectric Measurement Techniques
- Photonic and Optical Devices
- Image Processing Techniques and Applications
- Photoacoustic and Ultrasonic Imaging
- Non-Destructive Testing Techniques
Beijing Institute of Technology
2019-2021
During the real-aperture-scanning imaging process, terahertz (THz) images are often plagued with problem of low spatial resolution. Therefore, an accommodative super-resolution framework for THz is proposed. Specifically, 3D degradation model system firstly proposed by incorporating focused beam distribution, which determines relationship between range and corresponding image restoration level. Secondly, adjustable CNN introduced to cope this dependent problem. By simply tuning interpolation...
Satellite microwave radiometer data is affected by many degradation factors during the imaging process, such as sampling interval, antenna pattern and scan mode, etc., leading to spatial resolution reduction. In this paper, a deep residual convolutional neural network (CNN) proposed solve these problems learning end-to-end mapping between low-and high-resolution images. Unlike traditional methods that handle each factor separately, our jointly learns both interval limitation comprehensive...
Passive multi-frequency microwave remote sensing is often plagued with the problems of low- and non-uniform spatial resolution. In order to adaptively enhance match resolution, an accommodative resolution matching (ASRM) framework, composed flexible degradation model, deep residual convolutional neural network (CNN), adaptive feature modification (AdaFM) layers, proposed in this paper. More specifically, a based on imaging process radiometer, firstly generate suitable datasets for various...
The nonlinearity in terahertz (THz) linear frequency modulated continuous wave (LFMCW) radar usually blurs the range profile and decreases signal to noise ratio, hampering applications where high range-resolution is particularly emphasized. A software correction method, which comprises of transmitted estimation nonlinear phase compensation for beat signal, proposed this paper drastically reduce THz LFMCW radar. Besides commonly considered caused by voltage-controlled oscillator (VCO), from...
Terahertz (THz) testing, by the frequency modulated continuous wave (FMCW) system, is often hampered limited range resolution. Thus, in this paper, a software method proposed to reconstruct profile, yielding significant improvements resolution and signal parameter extraction. Specifically, multiple characterization algorithm first introduced indicate higher-resolution profile qualitatively acquire echoes’ initial values. Then, Gaussian functions are applied fit those echoes whole original...
A quasi-optical antenna system is designed for terahertz active standoff personnel screening in this paper. The design principle of the described detail according to actual needs. results from GRASP software shows that can achieve 10 mm imaging resolution over a 28 × 24 cm field view at 2 m with center frequency 180 GHz. it has potential be used screening.
The spatial resolution of terahertz (THz) image is often degraded by many factors during the imaging process. Therefore, a "Zero-Shot" super-resolution CNN framework, which trained only input itself, proposed to cope with those degradation factors. With this unsupervised restoration level can be flexibly adjusted based on THz in order achieve best effect. Experimental results both simulated data and real tested have proved effectiveness our method.