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.

Alleviating image artifacts in wavefront coding extended depth of field imaging system

2019 ◽  
Vol 436 ◽  
pp. 232-238
Author(s):  
Xutao Mo ◽  
Tao Zhang ◽  
Bin Wang ◽  
Xianshan Huang ◽  
Cuifang Kuang ◽  
...  
Keyword(s):  
Imaging System ◽  
Depth Of Field ◽  
Image Artifacts ◽  
Wavefront Coding ◽  
Extended Depth Of Field ◽  
Field Imaging

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

Extension Ratio of the Depth of Field for Wavefront Coding Imaging System

2008 ◽  
Vol 28 (5) ◽  
pp. 870-875 ◽  
Author(s):  
潘超 Pan Chao ◽  
陈家璧 Chen Jiabi ◽  
张荣福 Zhang Rongfu ◽  
庄松林 Zhuang Songlin
Keyword(s):  
Imaging System ◽  
Depth Of Field ◽  
Extension Ratio ◽  
Wavefront Coding

Optimized non-integer order phase mask to extend the depth of field of an imaging system

2016 ◽  
Vol 374 ◽  
pp. 92-96 ◽  
Author(s):  
Jiang Liu ◽  
Erlong Miao ◽  
Yongxin Sui ◽  
Huaijiang Yang
Keyword(s):  
Imaging System ◽  
Phase Mask ◽  
Depth Of Field ◽  
Integer Order

Study on depth of field of wavefront coding imaging system

2008 ◽  
Author(s):  
Chao Pan ◽  
Jiabi Chen ◽  
Dawei Zhang ◽  
Songlin Zhuang
Keyword(s):  
Imaging System ◽  
Depth Of Field ◽  
Wavefront Coding

scholarly journals A Wide-FoV Athermalized Infrared Imaging System with a Two-Piece Lens

2017 ◽  
Author(s):  
Bin Feng ◽  
Zelin Shi ◽  
Yaohong Zhao ◽  
Haizheng Liu ◽  
Li Liu
Keyword(s):  
Infrared Imaging ◽  
Imaging System ◽  
Operating Temperature ◽  
Transmission Efficiency ◽  
Phase Mask ◽  
Wide Field ◽  
Cubic Surface ◽  
Infrared Imaging System ◽  
Wavefront Coding ◽  
Wide Fov

For a wide field of view (FoV) wavefront coding athermalized infrared imaging system with a single decoding kernel, the off-axis aberration tends to cause artefacts. In order to correct off-axis aberration, many pieces of lenses will reduce the transmission efficiency and increase the weight and cost. To meet requirements for wide FoV, wide operating temperature and low weight of infrared imaging systems, this paper reports a wide-FoV wavefront coding athermalized infrared imaging system with a two-piece lens. Its principle, design, manufacture, measurement and performance validation are successively discussed. This paper constructs an optimization problem which maximizes the weighted mean of PSF consistency for both the FoV and operating temperature range. The two-piece lens contains four surfaces, where three aspheric surfaces are introduced to reduce optical off-axis aberrations and a cubic surface is introduced to achieve athermalization. The optical phase mask containing an aspheric surface and a cubic surface is manufactured by nano-metric machining of ion implanted material(NiIM). Experimental results validate that our wide-FoV wavefront coding athermalized infrared imaging system has a full FoV of 26.10° and an operating temperature over -20°C to +70°C.

Extended-depth-of-field object detection with wavefront coding imaging system

2019 ◽  
Vol 125 ◽  
pp. 597-603 ◽  
Author(s):  
Liquan Dong ◽  
Haoyuan Du ◽  
Ming Liu ◽  
Yuejin Zhao ◽  
Xueyan Li ◽  
...  
Keyword(s):  
Object Detection ◽  
Imaging System ◽  
Depth Of Field ◽  
Wavefront Coding ◽  
Extended Depth Of Field

Wavefront Coded Imaging Systems for MEMS Analysis

2002 ◽  
Author(s):  
Daniel L. Barton ◽  
Jeremy A. Walraven ◽  
Edward R. Dowski ◽  
Rainer Danz ◽  
Andreas Faulstich ◽  
...  
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
High Performance ◽  
Imaging System ◽  
Three Dimensional ◽  
Imaging Systems ◽  
Depth Of Field ◽  
Real Time Imaging ◽  
Large Depth ◽  
Wavefront Coding

Abstract A new imaging technique called Wavefront Coding allows real-time imaging of three-dimensional structures over a very large depth. Wavefront Coding systems combine aspheric optics and signal processing to achieve depth of fields ten or more times greater than that possible with traditional imaging systems. Understanding the relationships between traditional and modern imaging system design through Wavefront Coding is very challenging. In high performance imaging systems nearly all aspects of the system that could reduce image quality are carefully controlled. Modifying the optics and using signal processing can increase the amount of image information that can be recorded by microscopes. For a number of applications this increase in information can allow a single image to be used where a number of images taken at different object planes had been used before. Having very large depth of field and real-time imaging capability means that very deep structures such as surface micromachined MEMS can be clearly imaged with one image, greatly simplifying defect and failure analysis.

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