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Joint digital-optical design of imaging systems for grayscale objects

M. Dirk Robinson, David G. Stork, Laurent Mazuray, Rolf Wartmann, Andrew Wood, Jean-Luc Tissot, Jeffrey M. Raynor
2008 Optical Design and Engineering III  
The resulting optical systems have lower F # and greater depth-of-field than systems that do not exploit spectral correlations.  ...  We describe how to exploit such correlation during the design of electro-optical imaging systems to achieve greater imaging performance and lower optical component cost.  ...  We used our new design philosophy to design an extended depth-of-field triplet imaging system verifying the increased depth-of-field through image simulation.  ... 
doi:10.1117/12.797802 fatcat:z5brhy2qa5hzrogg4iot4cla2a

Vari-Focal Light Field Camera for Extended Depth of Field

Hyun Myung Kim, Min Seok Kim, Sehui Chang, Jiseong Jeong, Hae-Gon Jeon, Young Min Song
2021 Micromachines  
As a main lens of the system, a vari-focal lens with four different focal lengths is adopted to extend the DoF up to ~15 m.  ...  However, conventional light field cameras suffer from shallow depth of field (DoF).  ...  However, conventional 2D imaging systems are limited in capturing the real world because of the lack of depth information.  ... 
doi:10.3390/mi12121453 pmid:34945303 pmcid:PMC8706624 fatcat:fi2vuywzhjfcznvtn5f7eo43hu

Physics vs. Learned Priors: Rethinking Camera and Algorithm Design for Task-Specific Imaging [article]

Tzofi Klinghoffer, Siddharth Somasundaram, Kushagra Tiwary, Ramesh Raskar
2022 arXiv   pre-print
In this paper, we present a framework to understand the building blocks of this nascent field of end-to-end design of camera hardware and algorithms.  ...  As part of this framework, we show how methods that exploit both physics and data have become prevalent in imaging and computer vision, underscoring a key trend that will continue to dominate the future  ...  More complex multilens systems enable extended depth of field and correction of optical aberrations. These imaging systems were derived from fundamental ideas in optics.  ... 
arXiv:2204.09871v1 fatcat:niqi6uh7rjhd3i5o2wir2ihwty

Adaptive View Sampling for Efficient Synthesis of 3D View Using Calibrated Array Cameras

Geonwoo Kim, Deokwoo Lee
2021 Electronics  
This work determines the optimal number of images that sufficiently provides a reliable 3D extended view by generating a mesh and image textures.  ...  The optimal number of images contributes to an efficient system for 3D view generation that reduces the computational complexity while preserving the quality of the result in terms of the PSNR.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/electronics10010082 fatcat:nkcxjmh23rcgrorlmoodperiyi

High-rank coded aperture projection for extended depth of field

Chenguang Ma, Jinli Suo, Qionghai Dai, R. Raskar, G. Wetzstein
2013 IEEE International Conference on Computational Photography (ICCP)  
Unfortunately, this leads to shallow depths of field (DOF), hence blurry images, when projecting on non-planar surfaces, such as cultural heritage sites, curved screens, or when sharing visual information  ...  of the human visual system.  ...  Chenguang Ma, Jinli Suo and Qionghai Dai were supported by the National Basic Research Project (No. 2010CB731800) and the Project of NSFC (No. 61120106003, 61171119 and 60932007).  ... 
doi:10.1109/iccphot.2013.6528303 dblp:conf/iccp/MaSDRW13 fatcat:qqpqjq54nzgjxovovymcyxba4m

CodedStereo: Learned Phase Masks for Large Depth-of-field Stereo [article]

Shiyu Tan, Yicheng Wu, Shoou-I Yu, Ashok Veeraraghavan
2021 arXiv   pre-print
The phase mask creates a depth-dependent point spread function, allowing us to recover sharp image texture and stereo correspondence over a significantly extended depth of field (EDOF) than conventional  ...  Inspired by the extended depth of field cameras, we propose a novel end-to-end learning-based technique to overcome this limitation, by introducing a phase mask at the aperture plane of the cameras in  ...  Inspired by the extended depth of field (EDOF) imaging techniques [10] , we present CodedStereo, a technique in which we add optimized phase masks to the aperture of each of the two stereo cameras.  ... 
arXiv:2104.04641v1 fatcat:zuf6j3o3wvgcxihwoxdc2ope7y

Noise removal in extended depth of field microscope images through nonlinear signal processing

Ramzi N. Zahreddine, Robert H. Cormack, Carol J. Cogswell
2013 Applied Optics  
Extended depth of field (EDF) microscopy allows for real-time 3D imaging of live cell dynamics.  ...  A nonlinear processing scheme is proposed which extends the depth of field while minimizing background noise. The nonlinear filter is generated via a training algorithm and an iterative optimizer.  ...  Acknowledgments Portions of this work were supported by the National Institutes of Health (1R43RR028192-01).  ... 
doi:10.1364/ao.52.0000d1 pmid:23667954 fatcat:svg6tpx6bbedxifc62u5rkjuwy

Pupil-phase optimization for extended-focus, aberration-corrected imaging systems

Sudhakar Prasad, V. Paul Pauca, Robert J. Plemmons, Todd C. Torgersen, Joseph van der Gracht, Franklin T. Luk
2004 Advanced Signal Processing Algorithms, Architectures, and Implementations XIV  
The insertion of a suitably designed phase plate in the pupil of an imaging system makes it possible to encode the depth dimension of an extended three-dimensional scene by means of an approximately shift-invariant  ...  The so-encoded image can then be deblurred digitally by standard image recovery algorithms to recoup the depth dependent detail of the original scene.  ...  We would also like to thank Ulf Cahn von Seelen and James Cambier of Iridian Technologies, Inc. as well as John Daugman of Cambridge University for many helpful discussions concerning the recognition algorithm  ... 
doi:10.1117/12.560235 fatcat:mzvldzl6jfb5zib7khxtvxobl4

New paradigm for imaging systems

W. Thomas Cathey, Edward R. Dowski
2002 Applied Optics  
Signal processing then decodes the detected image. The coding can be done so that the depth of focus can be extended.  ...  We describe a new paradigm for designing hybrid imaging systems.  ...  Examples given involved the extension of the depth of focus of an imaging system, and that depth of focus can be used to extend the depth of field of the system and͞or to make the imaging system invariant  ... 
doi:10.1364/ao.41.006080 pmid:12389977 fatcat:ydvg5ocisngelgx45jpnq72vqa

Distributed wavefront coding for wide angle imaging system

Martin Larivière-Bastien, Hu Zhang, Simon Thibault, R. Barry Johnson, Virendra N. Mahajan, Simon Thibault
2011 Current Developments in Lens Design and Optical Engineering XII; and Advances in Thin Film Coatings VII  
The emerging paradigm of imaging systems, known as wavefront coding, which employs joint optimization of both the optical system and the digital post-processing system, has not only increased the degrees  ...  While previous research on wavefront coding was mainly targeted at imaging systems having a small or modest field of view (FOV), we present a preliminary study on wavefront coding applied to panoramic  ...  The next step to apply wavefront coding to a panoramic imager is to identify how much of each aberration the system can tolerate and use this information during the optimization.  ... 
doi:10.1117/12.896114 fatcat:ag5pav2n3jeq7lv5opx272252y

Depth extended online RPCA with spatiotemporal constraints for robust background subtraction

Sajid Javed, Theirry Bouwmans, Soon Ki Jung
2015 2015 21st Korea-Japan Joint Workshop on Frontiers of Computer Vision (FCV)  
ACKNOWLEDGMENT This work is supported by the World Class 300 project, Development of HD video/network-based video surveillance system(10040370), funded by the Ministry of Trade, Industry, and Energy (MOTIE  ...  In [16] , a codebook algorithm is extended with fusing depth information.  ...  Section III describes the proposed extended OR-PCA framework based on color and depth information.  ... 
doi:10.1109/fcv.2015.7103745 dblp:conf/fcv/JavedBJ15 fatcat:h7fw55sivjhe5l57hohr4qmnza

Tomographic near-eye displays

Seungjae Lee, Youngjin Jo, Dongheon Yoo, Jaebum Cho, Dukho Lee, Byoungho Lee
2019 Nature Communications  
The synchronization of the focus-tunable optics and the backlight enables the display panel to express the depth information.  ...  Here, we present a tomographic near-eye display that supports a wide depth of field, quasi-continuous accommodation, omni-directional motion parallax, preserved resolution, full frame, and moderate field  ...  The binary image sequence is derived from the depth information of the 3D volumetric objects.  ... 
doi:10.1038/s41467-019-10451-2 pmid:31175279 pmcid:PMC6555831 fatcat:6umjkhd46zb7dmd3f4dfysqzu4

Semi-independent Stereo Visual Odometry for Different Field of View Cameras [chapter]

Trong Phuc Truong, Vincent Nozick, Hideo Saito
2019 Lecture Notes in Computer Science  
Indeed, when considering a fixed resolution, a narrow field of view has a higher angular resolution and can preserve image texture details.  ...  We propose a semi-independent stereo system where each camera performs individually temporal multi-view optimization but their initial parameters are still jointly optimized in an iterative framework.  ...  This depth map is used to track the camera pose of new frames fed into to the system by minimizing the photometric error using direct image alignment.  ... 
doi:10.1007/978-3-030-11009-3_26 fatcat:nhpxbmbidfcujjel4jmddfyumi

Optimization of wavefront-coded infinity-corrected microscope systems with extended depth of field

Tingyu Zhao, Thomas Mauger, Guoqiang Li
2013 Biomedical Optics Express  
The depth of field is extended to about 13 times of the traditional one.  ...  The depth of field of an infinity-corrected microscope system is greatly extended by simply applying a specially designed phase mask between the objective and the tube lens.  ...  Institute of Biomedical Imaging and Bioengineering (through grant R21 EB008857), National Institute of General Medical Sciences (through grant R21 RR026254/R21 GM103439), and Wallace H.  ... 
doi:10.1364/boe.4.001464 pmid:24010008 pmcid:PMC3756573 fatcat:lptjq4r4lvf2dozrhrlgr3ec7u

Computational Cameras: Convergence of Optics and Processing

Changyin Zhou, S. K. Nayar
2011 IEEE Transactions on Image Processing  
and clusters, and unconventional imaging systems.  ...  In the last decade, computational imaging has emerged as a vibrant field of research.  ...  The extended depth of field (EDOF) is another promising solution to recover sharp images without knowing the depth.  ... 
doi:10.1109/tip.2011.2171700 pmid:22020681 fatcat:wjr6p4a6nvhcbnrqlb2nwjkxuy
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