Kiarash Ahi,
https://www.sciencedirect.com/science/article/pii/S0263224118305700
In this paper, a comprehensive method and process for developing Terahertz (THz) images with enhanced resolution is introduced. This method is implemented as a system comprised of various resolution and quality enhancement techniques. In this system, filters in time and frequency domains are used to filter out the noise, low-frequency spectrum, and diffraction distortions. Point Spread Function (PSF) is modeled and the quality of the output image is enhanced further through deconvolution. This process can be fully implemented on THz Time-Domain Spectroscopy (TDS) systems, and partially on continuous-wave THz imaging systems. By taking advantage of the proposed process, researchers and industrial sectors can achieve a substantial enhancement on the quality and resolution of their THz images.
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