scholarly journals Experimental demonstration of extended depth-of-field $f/1.2$ visible High Definition camera with jointly optimized phase mask and real-time digital processing

2015 ◽  
Vol 10 ◽  
Author(s):  
M.-A. Burcklen ◽  
F. Diaz ◽  
F. Lepretre ◽  
J. Rollin ◽  
A. Delboulbe ◽  
...  
Keyword(s):  
Real Time ◽  
Digital Processing ◽  
Phase Mask ◽  
Depth Of Field ◽  
Experimental Demonstration ◽  
High Definition ◽  
Extended Depth Of Field

An extended depth-of-field imaging system with a non-rotationally symmetric phase mask

2018 ◽  
Vol 89 (10) ◽  
pp. 103101 ◽  
Author(s):  
Hongbo Xie ◽  
Lirong He ◽  
Lei Yang ◽  
Chensheng Mao ◽  
Meng Zhu ◽  
...  
Keyword(s):  
Imaging System ◽  
Phase Mask ◽  
Depth Of Field ◽  
Rotationally Symmetric ◽  
Extended Depth Of Field ◽  
Field Imaging ◽  
Symmetric Phase

scholarly journals Investigation of extended depth-of-field f/8 camera with optimized cubic phase mask and digital restoration

2020 ◽  
Vol 238 ◽  
pp. 03008
Author(s):  
Po-Sheng Chiu ◽  
Kurt Vonmetz ◽  
Federico Canini ◽  
H. Paul Urbach
Keyword(s):  
Mean Squared Error ◽  
Imaging System ◽  
Optimal Solution ◽  
Phase Mask ◽  
Depth Of Field ◽  
Cubic Phase ◽  
Modulation Transfer ◽  
Original Design ◽  
Digital Restoration ◽  
Extended Depth Of Field

An investigation of extended depth-of-field camera with optimized phase mask and digital restoration is presented. The goal of this paper is to implement the wavefront coding technique without affecting much of the original design, and the design has taken the complexity of imaging system into consideration. The optimized strength of cubic phase mask (CPM) is based on the analytical optimal solution for the task-based imaging system [J. Opt. Soc. Am. A 25, 1064 (2008)]. The noisy intermediate images of CPM system with highest spatial frequency of interest can be effectively restored by vector-based Richardson-Lucy algorithm. Restoration from the system with generalized CPM produces precise image position than the system with CPM does. In general, the CPM system procures modulation transfer function higher than 0.195 in the whole depth-of-field, and the mean squared error of the restored images are less than 5 %.

scholarly journals Real-time increase in depth of field of an uncooled thermal camera using several phase-mask technologies

2011 ◽  
Vol 36 (3) ◽  
pp. 418 ◽  
Author(s):  
Frédéric Diaz ◽  
Mane-Si Laure Lee ◽  
Xavier Rejeaunier ◽  
Gaelle Lehoucq ◽  
François Goudail ◽  
...  
Keyword(s):  
Real Time ◽  
Phase Mask ◽  
Depth Of Field ◽  
Time Increase ◽  
Thermal Camera

scholarly journals An optimal binary amplitude-phase mask for hybrid imaging systems that exhibit high resolution and extended depth of field

2008 ◽  
Vol 16 (25) ◽  
pp. 20540 ◽  
Author(s):  
Eyal Ben-Eliezer ◽  
Naim Konforti ◽  
Benjamin Milgrom ◽  
Emanuel Marom
Keyword(s):  
High Resolution ◽  
Hybrid Imaging ◽  
Imaging Systems ◽  
Phase Mask ◽  
Depth Of Field ◽  
Extended Depth Of Field

scholarly journals Real-time extended depth of field microscopy

2008 ◽  
Vol 16 (26) ◽  
pp. 21843 ◽  
Author(s):  
Edward J. Botcherby ◽  
Martin J. Booth ◽  
Rimas Juškaitis ◽  
Tony Wilson
Keyword(s):  
Real Time ◽  
Depth Of Field ◽  
Extended Depth Of Field

Real-time bayer-domain image restoration for an extended depth of field (EDoF) camera

2009 ◽  
Vol 55 (4) ◽  
pp. 1756-1764 ◽  
Author(s):  
Sangjin Kim ◽  
Sinyoung Jun ◽  
Eunsung Lee ◽  
Jeongho Shin ◽  
Joonki Paik
Keyword(s):  
Image Restoration ◽  
Real Time ◽  
Depth Of Field ◽  
Extended Depth Of Field

PARAMETRIC BLIND-DECONVOLUTION METHOD TO REMOVE IMAGE ARTIFACTS IN WAVEFRONT CODING IMAGING SYSTEMS

2021 ◽  
pp. 62-68
Author(s):  
Nhu
Keyword(s):  
Blind Deconvolution ◽  
Imaging System ◽  
Digital Processing ◽  
Phase Mask ◽  
Depth Of Field ◽  
Image Artifacts ◽  
Deconvolution Method ◽  
Wavefront Coding ◽  
High Quality Image ◽  
Processing Step

Wavefront coding technique includes a phase mask of asymmetric phase mask kind in the pupil plane to extend the depth of field of an imaging system and the digital processing step to obtain the restored final high-quality image. However, the main drawback of wavefront coding technique is image artifacts on the restored final images. In this paper, we proposed a parameter blind-deconvolution method based on maximizing of the variance of the histogram of restored final images that enables to obtain the restored final image with artifact-free over a large range of defocus.

Development of High-Definition Image Processing System for a FE-SEM

1996 ◽  
Vol 54 ◽  
pp. 458-459
Author(s):  
M. Yamada ◽  
T. Yoshihara ◽  
H. Arima ◽  
Y. Nimura ◽  
T. Kobayashi ◽  
...  
Keyword(s):  
Image Processing ◽  
Image Quality ◽  
Real Time ◽  
Processing System ◽  
Digital Processing ◽  
High Definition ◽  
Sem Images ◽  
Pixel Resolution ◽  
Generator System ◽  
Image Processing System

This paper presents the development of a new, fully digital image processing system for a field emission SEM (FE-SEM) which can eliminate fluctuations in the emission current. The system can display, in real time, images with 1280 × 1024 pixels on a viewing CRT, allowing direct observation of high definition SEM images on the FE-SEM.In the past, even though image was acquired and recorded (photographed) with the resolution higher than 1,000 x 1,000 pixels, it was generally observed on the viewing CRT at the resolution of only about 500 x 500 pixels for real-time observation. This created a difference in image quality between the two CRT's. Using a CRT of the same pixel resolution for observation as on the recording CRT, the difference in image quality can be minimised, provided that the characteristics (speed and resolution) of the image processing and scan generator system are improved and optimised for digital processing.

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