Restoration of integrated circuit terahertz image based on wavelet denoising technique and the point spread function model

2021 ◽  
Vol 138 ◽  
pp. 106413
Author(s):  
Zhirui Zhang ◽  
Yao Lu ◽  
Cixing Lv ◽  
Qi Mao ◽  
Songlong Wang ◽  
...  
Keyword(s):  
Point Spread Function ◽  
Integrated Circuit ◽  
Wavelet Denoising ◽  
Function Model ◽  
Point Spread ◽  
Spread Function

Point Spread Function Model of Grating Imaging System Based on Boltzmann Function Edge Fitting

2020 ◽  
Vol 40 (14) ◽  
pp. 1405003
Author(s):  
卢泉 Lu Quan ◽  
张泽昊 Zhang Zehao ◽  
张卫平 Zhang Weiping ◽  
刘诣荣 Liu Yirong
Keyword(s):  
Point Spread Function ◽  
Imaging System ◽  
Function Model ◽  
Point Spread ◽  
Boltzmann Function ◽  
Spread Function

scholarly journals PSF–NET: A Nonparametric Point-spread Function Model for Ground-based Optical Telescopes

2020 ◽  
Vol 159 (4) ◽  
pp. 183 ◽  
Author(s):  
Peng Jia ◽  
Xuebo Wu ◽  
Huang Yi ◽  
Bojun Cai ◽  
Dongmei Cai
Keyword(s):  
Point Spread Function ◽  
Function Model ◽  
Point Spread ◽  
Spread Function ◽  
Optical Telescopes

scholarly journals Enormous Cloud Cover on Venus observed by Akatsuki’s IR2 data recovered by Restoration-by-Deconvolution (RD) method

2020 ◽  
Author(s):  
Choon Wei Vun ◽  
Takehiko Satoh ◽  
Takao M. Sato ◽  
Takeshi Horinouchi
Keyword(s):  
Sulfuric Acid ◽  
Radiative Transfer ◽  
Physical Properties ◽  
Optical Thickness ◽  
Point Spread Function ◽  
Cloud Cover ◽  
Function Model ◽  
Emission Data ◽  
Point Spread ◽  
Spread Function

Abstract We have developed a new method ‘Restoration by Deconvolution’ (RD) to restore nightside photometry in the Akatsuki/IR2 images contaminated by spread light from intense dayside crescent. With updated point spread function model for IR2 and incorporation of radiative transfer computations, our RD-method is able to improve the photometric accuracy of nightside emission data in both 2.26µm and 1.735µm filters. Exploiting the enhanced photometric quality, the ‘Enormous Cloud Cover’ (ECC) features observed in both 2016-08-18 and 2016-08-27 data have been investigated. Possible altitude variations in the ECC’s spatial variation measurements from z=52km up to z=60km were found. The observations were interpreted that ECC constituting of large sulfuric acid droplets (mean radius of 3.65µm and the optical thickness ~7-9) experience strong upwelling near the ECC front. This elevates the aerosols up to z=58-60km, then subjected upon by strong downwelling forces the particles to sink by a velocity ~-0.3m/s. The analyses of physical properties and evolutionary behavior of the ECC on both dates (08-18 and 08-27) suggest them to be recurring phenomena in the lower part of Venus’ clouds.

Predicted Space-Varying Point Spread Function Model for Anisoplanatic Adaptive Optics Imaging

2011 ◽  
Vol 31 (12) ◽  
pp. 1201001 ◽  
Author(s):  
常翔 Chang Xiang ◽  
李荣旺 Li Rongwang ◽  
熊耀恒 Xiong Yaoheng
Keyword(s):  
Adaptive Optics ◽  
Point Spread Function ◽  
Function Model ◽  
Point Spread ◽  
Adaptive Optics Imaging ◽  
Spread Function
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