Deblurring. Basics, Problem definition and variants
|
|
- Wesley Gilbert
- 6 years ago
- Views:
Transcription
1 Deblurring Basics, Problem definition and variants
2 Kinds of blur Hand-shake Defocus Credit: Kenneth Josephson Motion
3
4
5 Credit: Kenneth Josephson
6 Kinds of blur Spatially invariant vs. Spatially varying
7 Kinds of blur 1D vs 2D blur kernels
8
9
10 Problem definition Lets assume a spatially invariant blurring model
11 LTI modeling Blurring h(x)
12 LTI modeling Blurring h(x) Can we get back the sharp image?
13 LTI modeling Blurring h(x) Could we consider getting back the sharp image?
14 LTI modeling Blurring h(x) Could we consider getting back the sharp image? Challenges 1. What if has zeros? 2. Do we know h(t)? 3. (peril of DFT) Periodicity!
15 Image Priors Suppose h(t) is known, today image deblurring is considered close-to-solved Regularizer Data term Commonly used regularizers Wavelet sparsity Gradients of the image are sparse Poisson gradients Mixture of Gaussians model for image gradients
16 BlurBurst Multi-image deblurring technique
17 Telephoto imaging Low vision photography
18 Large blur Blur due to camera shake can be very large Telephoto (zoom) imaging Narrow field of view implies small handshake are amplified Low-light imaging Large exposure times leads to large blurs Hand-held high dynamic range (HDR) imaging
19 Deblurring on large blur (Shan et al, 2008)
20 Deblurring on large blur (Shan et al, 2008)
21 Why is large blur hard? Extreme loss of high-frequency information
22 Use multiple images!!! Most cameras have a burst-mode to capture images in rapid succession Two key ideas More images implies great resiliency to noise Camera shake is never the same across images! Different frequency components are attenuated in different images
23 Use multiple images!!!
24 Use multiple images!!! Most cameras have a burst-mode to capture images in rapid succession Two key ideas More images implies great resiliency to noise Camera shake is never the same across images! Different frequency components are attenuated in different images Challenges Registration!!!!
25 Why deblurring is easier with multiple image? (a) Single image Blur PSF 5 pixels (b) Single image Blur PSF 25 pixels Compensating high-frequency information each other along perpendicular directions of blur kernels. Improving SNR just by virtue of noise suppression (c) Two images Blur PSF 25 pixels (d) Six image Blur PSF 25 pixels (a) (b) (c) (d) Orig. Comparison of select patches
26 Algorithm Blur Latent Registration Kernel Image Regularization: L1 TV norm norm Feature extraction and matching: - Extracting SIFT features and match them to a pre-selected reference image. Homography estimation: - The feature correspondences are used to fit a homography transformation using RANSAC. Noise Model: Solved by by SPG-L1 M-Fista
27 Deblurring on large blur (Shan et al, 2008)
28
29 (Shan et al, 2008)
30
31 Input image
32 Shan et al.
33 BlurBurst (us)
34 Tripod image
35 Real Data Results Low Light Scene Exposure time: 1.6sec 49x49 blur kernel size 6 input images at 512x512 Shan s Single Deblur (08) Cho s Single Deblur (09) Input Images Estimated Blur Kernels Šroubek s Multi Deblur (12) Ours
36 Real Data Results Low Light Scene Exposure time: 0.25sec 39x39 blur kernel size 8 input images at 512x512 Shan s Single Deblur (08) Cho s Single Deblur (09) Input Images Estimated Blur Kernels Šroubek s Multi Deblur (12) Ours
37 Real Data Results Telephoto & Low Light Focal Length: 300mm Exposure time: 0.2sec 49x49 blur kernel size 6 input images at 512x512 Shan s Single Deblur (08) Cho s Single Deblur (09) Input Images Estimated Blur Kernels Šroubek s Multi Deblur (12) Ours
38 Coded Exposure Photography: Motion deblurring using fluttered shutter Raskar, Agrawal, and Tumblin SIGGRAPH 2006 Slide-deck credit: Raskar, Agrawal, Tumblin
39 Traditional Camera Shutter is OPEN
40 Our Camera Flutter Shutter
41 Shutter is OPEN and CLOSED
42 Comparison of Blurred Images
43 Implementation Completely Portable
44 Lab Setup
45 Sync Function Blurring == Convolution Traditional Camera: Box Filter
46 Preserves High Frequencies!!! Flutter Shutter: Coded Filter
47 Comparison
48 Inverse Filter Unstable Inverse Filter stable
49 Motion Blur as Convolution
50 Short Exposure Long Exposure Coded Exposure Our result Matlab Lucy Ground Truth
51 Are all codes good? Our Code All ones Alternate Random
52 Need to consider zero padded codes!!!
53 License Plate Retrieval
54 License Plate Retrieval
55
56
57 Input Image
58 Rectified Crop Deblurred Result
59 Varying Exposure Video Exposure Time Fourier Transform Slide courtesy Agrawal
60 Varying Exposure Video No common nulls Exposure Time Fourier Transform Exposure Time Slide courtesy Agrawal
61 Varying Exposure Video No common nulls Exposure Time Fourier Transform Exposure Time Exposure Time Slide courtesy Agrawal
62 Varying Exposure Video = PSF Null-Filling Fourier Transform Joint Frequency Spectrum Preserves All Frequencies Slide courtesy Agrawal
63 Varying Exposure Video
64 Blurred Photos Deblurred Result Slide courtesy Agrawal
65 Key Idea: PSF Null-Filling Individual non-invertible PSF s combined into jointly-invertible PSF Information lost in any single photo is captured in some other photo For motion deblurring Achieve PSF null-filling by varying the exposure time of successive photos Varying Exposure Photo 1 Photo 2 Photo 3 Slide courtesy Agrawal
66 Single Image Deblurring (SID) Multiple Image Deblurring (MID) Slide courtesy Agrawal
67 Motion Invariant Photography Levin, Sand, Cho, Durand, Freeman SIGGRAPH 2008 Slide-deck credit: Levin et al.
68 Motion Blur Most scene is static Can moving linearly from left to right
69 Overcoming motion blur? Reduce shutter speed But reduces amount of light When shutter speed is as fast as we physically can and there is still blur Computational solution: Deconvolution
70 Why is motion deblurring hard? Need to know blur kernel (motion velocity)? Input blurry image Correct kernel Output from correct kernel? Input blurry image Wrong kernel Output from wrong kernel
71 Why is motion deblurring hard? Need to know blur kernel (motion velocity) Need to segment image Entire image deblurred with kernel corresponding to the cans velocity
72 Why is motion deblurring hard? Need to know blur kernel (motion velocity) Need to segment image Existing solutions: - Multiple input images/ additional hardware: Bascle et al 1996; Rav-Acha and Peleg 2005; Zheng 2005; Bar et al 2007; Ben-Ezra and Nayar 2004; Yuan et al Image statistics- single image with restricted assumptions: Fergus et al 2006; Levin 2006; Shan et al 2008;
73 Why is motion deblurring hard? Need to know blur kernel (motion velocity) Need to segment image Information loss (reduced signal to noise ratio) blurred input deblurred static input
74 Why is motion deblurring hard? Need to know blur kernel (motion velocity) Need to segment image Information loss - Existing approach: Flutter Shutter, Raskar et al 2006 Close & open shutter during exposure, achieves broad-band kernel. But does not address kernel estimation and segmentation
75 Counter intuitive solution: To reduce motion blur, increase it! - move camera as picture is taken Makes blur invariant to motion- can be removed with spatially uniform deconvolution - kernel is known (no need to estimate motion) - kernel identical over the image (no need to segment) Makes blur easy to invert
76 Inspiration: depth invariant defocus Wave front coding - manipulate optical element Cathey and Dowski 94 Vary object/detector distance during integration - Hausler 72 - Nagahara, Kuthirummal, Zhou, Nayar 08
77 Motion invariant blur- disclaimers: Assumes 1D motion (e.g. horizontal) Degrades quality for static objects
78 Controlling motion blur
79 Controlling motion blur Can we control motion blur?
80 Controlling motion blur
81 Controlling motion blur
82 Controlling motion blur
83 Motion invariant blur Controlling motion blur
84 Parabolic sweep Time t Sensor position x(t)=a t 2 Start by moving very fast to the right Continuously slow down until stop Continuously accelerate to the left Intuition: For any velocity, there is one instant where we track perfectly. Sensor position x
85 Motion invariant blur
86 Motion invariant blur
87 Motion invariant blur
88 Static camera Unknown and variable blur kernels Our parabolic input Blur kernel is invariant to velocity Our output after deblurring NON-BLIND deconvolution
89 Deblurring and information loss Assume: we could perfectly identify blur kernel Which camera has motion blur that is easy to invert? - Static? Flutter Shutter? Parabolic? Prove: parabolic motion achieves near optimal information preservation blurred input deblurred static input
90 Comparing camera reconstruction Blurred input Static Flutter Shutter Parabolic Deblurred output Note: synthetic rendering, exact PSF is known
91 Hardware construction Ideally move sensor (requires same hardware as existing stabilization systems) In prototype implementation: rotate camera variable radius cam Lever Rotating platform
92 Linear rail Static camera input- Unknown and variable blur Our parabolic input- Blur is invariant to velocity
93 Linear rail Static camera input- Unknown and variable blur Our output after deblurring- NON-BLIND deconvolution
94 Human motion- no perfect linearity Input from a static camera Deblurred output from our camera
95 Violating 1D motion assumption- forward motion Input from a static camera Deblurred output from our camera
96 Violating 1D motion assumption- stand-up motion Input from a static camera Deblurred output from our camera
97 Violating 1D motion assumption- rotation Input from a static camera Deblurred output from our camera
Coded Computational Photography!
Coded Computational Photography! EE367/CS448I: Computational Imaging and Display! stanford.edu/class/ee367! Lecture 9! Gordon Wetzstein! Stanford University! Coded Computational Photography - Overview!!
More informationCoded photography , , Computational Photography Fall 2018, Lecture 14
Coded photography http://graphics.cs.cmu.edu/courses/15-463 15-463, 15-663, 15-862 Computational Photography Fall 2018, Lecture 14 Overview of today s lecture The coded photography paradigm. Dealing with
More informationComputational Camera & Photography: Coded Imaging
Computational Camera & Photography: Coded Imaging Camera Culture Ramesh Raskar MIT Media Lab http://cameraculture.media.mit.edu/ Image removed due to copyright restrictions. See Fig. 1, Eight major types
More informationCoded photography , , Computational Photography Fall 2017, Lecture 18
Coded photography http://graphics.cs.cmu.edu/courses/15-463 15-463, 15-663, 15-862 Computational Photography Fall 2017, Lecture 18 Course announcements Homework 5 delayed for Tuesday. - You will need cameras
More informationNear-Invariant Blur for Depth and 2D Motion via Time-Varying Light Field Analysis
Near-Invariant Blur for Depth and 2D Motion via Time-Varying Light Field Analysis Yosuke Bando 1,2 Henry Holtzman 2 Ramesh Raskar 2 1 Toshiba Corporation 2 MIT Media Lab Defocus & Motion Blur PSF Depth
More informationRecent Advances in Image Deblurring. Seungyong Lee (Collaboration w/ Sunghyun Cho)
Recent Advances in Image Deblurring Seungyong Lee (Collaboration w/ Sunghyun Cho) Disclaimer Many images and figures in this course note have been copied from the papers and presentation materials of previous
More informationDappled Photography: Mask Enhanced Cameras for Heterodyned Light Fields and Coded Aperture Refocusing
Dappled Photography: Mask Enhanced Cameras for Heterodyned Light Fields and Coded Aperture Refocusing Ashok Veeraraghavan, Ramesh Raskar, Ankit Mohan & Jack Tumblin Amit Agrawal, Mitsubishi Electric Research
More informationAdmin Deblurring & Deconvolution Different types of blur
Admin Assignment 3 due Deblurring & Deconvolution Lecture 10 Last lecture Move to Friday? Projects Come and see me Different types of blur Camera shake User moving hands Scene motion Objects in the scene
More informationCoding and Modulation in Cameras
Coding and Modulation in Cameras Amit Agrawal June 2010 Mitsubishi Electric Research Labs (MERL) Cambridge, MA, USA Coded Computational Imaging Agrawal, Veeraraghavan, Narasimhan & Mohan Schedule Introduction
More informationA Framework for Analysis of Computational Imaging Systems
A Framework for Analysis of Computational Imaging Systems Kaushik Mitra, Oliver Cossairt, Ashok Veeraghavan Rice University Northwestern University Computational imaging CI systems that adds new functionality
More informationmultiframe visual-inertial blur estimation and removal for unmodified smartphones
multiframe visual-inertial blur estimation and removal for unmodified smartphones, Severin Münger, Carlo Beltrame, Luc Humair WSCG 2015, Plzen, Czech Republic images taken by non-professional photographers
More informationDeconvolution , , Computational Photography Fall 2017, Lecture 17
Deconvolution http://graphics.cs.cmu.edu/courses/15-463 15-463, 15-663, 15-862 Computational Photography Fall 2017, Lecture 17 Course announcements Homework 4 is out. - Due October 26 th. - There was another
More informationImproved motion invariant imaging with time varying shutter functions
Improved motion invariant imaging with time varying shutter functions Steve Webster a and Andrew Dorrell b Canon Information Systems Research, Australia (CiSRA), Thomas Holt Drive, North Ryde, Australia
More informationWhen Does Computational Imaging Improve Performance?
When Does Computational Imaging Improve Performance? Oliver Cossairt Assistant Professor Northwestern University Collaborators: Mohit Gupta, Changyin Zhou, Daniel Miau, Shree Nayar (Columbia University)
More informationProject 4 Results http://www.cs.brown.edu/courses/cs129/results/proj4/jcmace/ http://www.cs.brown.edu/courses/cs129/results/proj4/damoreno/ http://www.cs.brown.edu/courses/csci1290/results/proj4/huag/
More informationImage Deblurring with Blurred/Noisy Image Pairs
Image Deblurring with Blurred/Noisy Image Pairs Huichao Ma, Buping Wang, Jiabei Zheng, Menglian Zhou April 26, 2013 1 Abstract Photos taken under dim lighting conditions by a handheld camera are usually
More informationCoded Exposure Deblurring: Optimized Codes for PSF Estimation and Invertibility
Coded Exposure Deblurring: Optimized Codes for PSF Estimation and Invertibility Amit Agrawal Yi Xu Mitsubishi Electric Research Labs (MERL) 201 Broadway, Cambridge, MA, USA [agrawal@merl.com,xu43@cs.purdue.edu]
More informationA Review over Different Blur Detection Techniques in Image Processing
A Review over Different Blur Detection Techniques in Image Processing 1 Anupama Sharma, 2 Devarshi Shukla 1 E.C.E student, 2 H.O.D, Department of electronics communication engineering, LR College of engineering
More informationDeconvolution , , Computational Photography Fall 2018, Lecture 12
Deconvolution http://graphics.cs.cmu.edu/courses/15-463 15-463, 15-663, 15-862 Computational Photography Fall 2018, Lecture 12 Course announcements Homework 3 is out. - Due October 12 th. - Any questions?
More informationOptimal Single Image Capture for Motion Deblurring
Optimal Single Image Capture for Motion Deblurring Amit Agrawal Mitsubishi Electric Research Labs (MERL) 1 Broadway, Cambridge, MA, USA agrawal@merl.com Ramesh Raskar MIT Media Lab Ames St., Cambridge,
More informationThe ultimate camera. Computational Photography. Creating the ultimate camera. The ultimate camera. What does it do?
Computational Photography The ultimate camera What does it do? Image from Durand & Freeman s MIT Course on Computational Photography Today s reading Szeliski Chapter 9 The ultimate camera Infinite resolution
More informationRecent advances in deblurring and image stabilization. Michal Šorel Academy of Sciences of the Czech Republic
Recent advances in deblurring and image stabilization Michal Šorel Academy of Sciences of the Czech Republic Camera shake stabilization Alternative to OIS (optical image stabilization) systems Should work
More informationToward Non-stationary Blind Image Deblurring: Models and Techniques
Toward Non-stationary Blind Image Deblurring: Models and Techniques Ji, Hui Department of Mathematics National University of Singapore NUS, 30-May-2017 Outline of the talk Non-stationary Image blurring
More informationCoded Aperture for Projector and Camera for Robust 3D measurement
Coded Aperture for Projector and Camera for Robust 3D measurement Yuuki Horita Yuuki Matugano Hiroki Morinaga Hiroshi Kawasaki Satoshi Ono Makoto Kimura Yasuo Takane Abstract General active 3D measurement
More informationTotal Variation Blind Deconvolution: The Devil is in the Details*
Total Variation Blind Deconvolution: The Devil is in the Details* Paolo Favaro Computer Vision Group University of Bern *Joint work with Daniele Perrone Blur in pictures When we take a picture we expose
More informationAgenda. Fusion and Reconstruction. Image Fusion & Reconstruction. Image Fusion & Reconstruction. Dr. Yossi Rubner.
Fusion and Reconstruction Dr. Yossi Rubner yossi@rubner.co.il Some slides stolen from: Jack Tumblin 1 Agenda We ve seen Panorama (from different FOV) Super-resolution (from low-res) HDR (from different
More informationImplementation of Image Deblurring Techniques in Java
Implementation of Image Deblurring Techniques in Java Peter Chapman Computer Systems Lab 2007-2008 Thomas Jefferson High School for Science and Technology Alexandria, Virginia January 22, 2008 Abstract
More informationBlurBurst: Removing Blur Due to Camera Shake using Multiple Images
: Removing Blur Due to Camera Shake using Multiple Images ATSUSHI ITO Sony Corporation and ASWIN C. SANKARANARAYANAN Carnegie Mellon University and ASHOK VEERARAGHAVAN and RICHARD G. BARANIUK Rice University
More informationComputational Photography
Computational photography Computational Photography Digital Visual Effects Yung-Yu Chuang wikipedia: Computational photography h refers broadly to computational imaging techniques that enhance or extend
More informationTo Do. Advanced Computer Graphics. Outline. Computational Imaging. How do we see the world? Pinhole camera
Advanced Computer Graphics CSE 163 [Spring 2017], Lecture 14 Ravi Ramamoorthi http://www.cs.ucsd.edu/~ravir To Do Assignment 2 due May 19 Any last minute issues or questions? Next two lectures: Imaging,
More informationImplementation of Adaptive Coded Aperture Imaging using a Digital Micro-Mirror Device for Defocus Deblurring
Implementation of Adaptive Coded Aperture Imaging using a Digital Micro-Mirror Device for Defocus Deblurring Ashill Chiranjan and Bernardt Duvenhage Defence, Peace, Safety and Security Council for Scientific
More informationMotion Deblurring using Coded Exposure for a Wheeled Mobile Robot Kibaek Park, Seunghak Shin, Hae-Gon Jeon, Joon-Young Lee and In So Kweon
Motion Deblurring using Coded Exposure for a Wheeled Mobile Robot Kibaek Park, Seunghak Shin, Hae-Gon Jeon, Joon-Young Lee and In So Kweon Korea Advanced Institute of Science and Technology, Daejeon 373-1,
More informationComputational Cameras. Rahul Raguram COMP
Computational Cameras Rahul Raguram COMP 790-090 What is a computational camera? Camera optics Camera sensor 3D scene Traditional camera Final image Modified optics Camera sensor Image Compute 3D scene
More informationRestoration of Motion Blurred Document Images
Restoration of Motion Blurred Document Images Bolan Su 12, Shijian Lu 2 and Tan Chew Lim 1 1 Department of Computer Science,School of Computing,National University of Singapore Computing 1, 13 Computing
More informationComputational Approaches to Cameras
Computational Approaches to Cameras 11/16/17 Magritte, The False Mirror (1935) Computational Photography Derek Hoiem, University of Illinois Announcements Final project proposal due Monday (see links on
More informationA Recognition of License Plate Images from Fast Moving Vehicles Using Blur Kernel Estimation
A Recognition of License Plate Images from Fast Moving Vehicles Using Blur Kernel Estimation Kalaivani.R 1, Poovendran.R 2 P.G. Student, Dept. of ECE, Adhiyamaan College of Engineering, Hosur, Tamil Nadu,
More informationTo Denoise or Deblur: Parameter Optimization for Imaging Systems
To Denoise or Deblur: Parameter Optimization for Imaging Systems Kaushik Mitra, Oliver Cossairt and Ashok Veeraraghavan 1 ECE, Rice University 2 EECS, Northwestern University 3/3/2014 1 Capture moving
More informationResolving Objects at Higher Resolution from a Single Motion-blurred Image
MITSUBISHI ELECTRIC RESEARCH LABORATORIES http://www.merl.com Resolving Objects at Higher Resolution from a Single Motion-blurred Image Amit Agrawal, Ramesh Raskar TR2007-036 July 2007 Abstract Motion
More informationMotion-invariant Coding Using a Programmable Aperture Camera
[DOI: 10.2197/ipsjtcva.6.25] Research Paper Motion-invariant Coding Using a Programmable Aperture Camera Toshiki Sonoda 1,a) Hajime Nagahara 1,b) Rin-ichiro Taniguchi 1,c) Received: October 22, 2013, Accepted:
More informationNon-Uniform Motion Blur For Face Recognition
IOSR Journal of Engineering (IOSRJEN) ISSN (e): 2250-3021, ISSN (p): 2278-8719 Vol. 08, Issue 6 (June. 2018), V (IV) PP 46-52 www.iosrjen.org Non-Uniform Motion Blur For Face Recognition Durga Bhavani
More information2015, IJARCSSE All Rights Reserved Page 312
Volume 5, Issue 11, November 2015 ISSN: 2277 128X International Journal of Advanced Research in Computer Science and Software Engineering Research Paper Available online at: www.ijarcsse.com Shanthini.B
More informationfast blur removal for wearable QR code scanners
fast blur removal for wearable QR code scanners Gábor Sörös, Stephan Semmler, Luc Humair, Otmar Hilliges ISWC 2015, Osaka, Japan traditional barcode scanning next generation barcode scanning ubiquitous
More informationTo Denoise or Deblur: Parameter Optimization for Imaging Systems
To Denoise or Deblur: Parameter Optimization for Imaging Systems Kaushik Mitra a, Oliver Cossairt b and Ashok Veeraraghavan a a Electrical and Computer Engineering, Rice University, Houston, TX 77005 b
More informationExtended depth of field for visual measurement systems with depth-invariant magnification
Extended depth of field for visual measurement systems with depth-invariant magnification Yanyu Zhao a and Yufu Qu* a,b a School of Instrument Science and Opto-Electronic Engineering, Beijing University
More informationTransfer Efficiency and Depth Invariance in Computational Cameras
Transfer Efficiency and Depth Invariance in Computational Cameras Jongmin Baek Stanford University IEEE International Conference on Computational Photography 2010 Jongmin Baek (Stanford University) Transfer
More informationCoded Aperture Pairs for Depth from Defocus
Coded Aperture Pairs for Depth from Defocus Changyin Zhou Columbia University New York City, U.S. changyin@cs.columbia.edu Stephen Lin Microsoft Research Asia Beijing, P.R. China stevelin@microsoft.com
More informationImproving Signal- to- noise Ratio in Remotely Sensed Imagery Using an Invertible Blur Technique
Improving Signal- to- noise Ratio in Remotely Sensed Imagery Using an Invertible Blur Technique Linda K. Le a and Carl Salvaggio a a Rochester Institute of Technology, Center for Imaging Science, Digital
More information4 STUDY OF DEBLURRING TECHNIQUES FOR RESTORED MOTION BLURRED IMAGES
4 STUDY OF DEBLURRING TECHNIQUES FOR RESTORED MOTION BLURRED IMAGES Abstract: This paper attempts to undertake the study of deblurring techniques for Restored Motion Blurred Images by using: Wiener filter,
More informationComputational Photography Image Stabilization
Computational Photography Image Stabilization Jongmin Baek CS 478 Lecture Mar 7, 2012 Overview Optical Stabilization Lens-Shift Sensor-Shift Digital Stabilization Image Priors Non-Blind Deconvolution Blind
More informationComputational Photography Introduction
Computational Photography Introduction Jongmin Baek CS 478 Lecture Jan 9, 2012 Background Sales of digital cameras surpassed sales of film cameras in 2004. Digital cameras are cool Free film Instant display
More informationSpline wavelet based blind image recovery
Spline wavelet based blind image recovery Ji, Hui ( 纪辉 ) National University of Singapore Workshop on Spline Approximation and its Applications on Carl de Boor's 80 th Birthday, NUS, 06-Nov-2017 Spline
More informationLenses, exposure, and (de)focus
Lenses, exposure, and (de)focus http://graphics.cs.cmu.edu/courses/15-463 15-463, 15-663, 15-862 Computational Photography Fall 2017, Lecture 15 Course announcements Homework 4 is out. - Due October 26
More informationImage Enhancement of Low-light Scenes with Near-infrared Flash Images
Research Paper Image Enhancement of Low-light Scenes with Near-infrared Flash Images Sosuke Matsui, 1 Takahiro Okabe, 1 Mihoko Shimano 1, 2 and Yoichi Sato 1 We present a novel technique for enhancing
More informationThe Flutter Shutter Camera Simulator
2014/07/01 v0.5 IPOL article class Published in Image Processing On Line on 2012 10 17. Submitted on 2012 00 00, accepted on 2012 00 00. ISSN 2105 1232 c 2012 IPOL & the authors CC BY NC SA This article
More informationCoded Aperture and Coded Exposure Photography
Coded Aperture and Coded Exposure Photography Martin Wilson University of Cape Town Cape Town, South Africa Email: Martin.Wilson@uct.ac.za Fred Nicolls University of Cape Town Cape Town, South Africa Email:
More informationImage Enhancement of Low-light Scenes with Near-infrared Flash Images
IPSJ Transactions on Computer Vision and Applications Vol. 2 215 223 (Dec. 2010) Research Paper Image Enhancement of Low-light Scenes with Near-infrared Flash Images Sosuke Matsui, 1 Takahiro Okabe, 1
More informationOptical image stabilization (IS)
Optical image stabilization (IS) CS 178, Spring 2010 Marc Levoy Computer Science Department Stanford University Outline! what are the causes of camera shake? how can you avoid it (without having an IS
More informationCS354 Computer Graphics Computational Photography. Qixing Huang April 23 th 2018
CS354 Computer Graphics Computational Photography Qixing Huang April 23 th 2018 Background Sales of digital cameras surpassed sales of film cameras in 2004 Digital Cameras Free film Instant display Quality
More informationOptical image stabilization (IS)
Optical image stabilization (IS) CS 178, Spring 2011 Marc Levoy Computer Science Department Stanford University Outline! what are the causes of camera shake? how can you avoid it (without having an IS
More informationComputational Photography and Video. Prof. Marc Pollefeys
Computational Photography and Video Prof. Marc Pollefeys Today s schedule Introduction of Computational Photography Course facts Syllabus Digital Photography What is computational photography Convergence
More informationImage Deblurring. This chapter describes how to deblur an image using the toolbox deblurring functions.
12 Image Deblurring This chapter describes how to deblur an image using the toolbox deblurring functions. Understanding Deblurring (p. 12-2) Using the Deblurring Functions (p. 12-5) Avoiding Ringing in
More informationIJCSNS International Journal of Computer Science and Network Security, VOL.14 No.12, December
IJCSNS International Journal of Computer Science and Network Security, VOL.14 No.12, December 2014 45 An Efficient Method for Image Restoration from Motion Blur and Additive White Gaussian Denoising Using
More informationCorrection of Spatially Varying Image and Video Motion Blur Using a Hybrid Camera
1012 IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, VOL. 32, NO. 6, JUNE 2010 Correction of Spatially Varying Image and Video Motion Blur Using a Hybrid Camera Yu-Wing Tai, Member, IEEE,
More informationMotion Blurred Image Restoration based on Super-resolution Method
Motion Blurred Image Restoration based on Super-resolution Method Department of computer science and engineering East China University of Political Science and Law, Shanghai, China yanch93@yahoo.com.cn
More informationMotion Estimation from a Single Blurred Image
Motion Estimation from a Single Blurred Image Image Restoration: De-Blurring Build a Blur Map Adapt Existing De-blurring Techniques to real blurred images Analysis, Reconstruction and 3D reconstruction
More informationFocal Sweep Videography with Deformable Optics
Focal Sweep Videography with Deformable Optics Daniel Miau Columbia University dmiau@cs.columbia.edu Oliver Cossairt Northwestern University ollie@eecs.northwestern.edu Shree K. Nayar Columbia University
More informationImage Deblurring and Noise Reduction in Python TJHSST Senior Research Project Computer Systems Lab
Image Deblurring and Noise Reduction in Python TJHSST Senior Research Project Computer Systems Lab 2009-2010 Vincent DeVito June 16, 2010 Abstract In the world of photography and machine vision, blurry
More informationWhat are Good Apertures for Defocus Deblurring?
What are Good Apertures for Defocus Deblurring? Changyin Zhou, Shree Nayar Abstract In recent years, with camera pixels shrinking in size, images are more likely to include defocused regions. In order
More informationMotion Deblurring Using Hybrid Imaging
Motion Deblurring Using Hybrid Imaging Moshe Ben-Ezra and Shree K. Nayar Computer Science Department, Columbia University New York, NY, USA E-mail: {moshe, nayar}@cs.columbia.edu Abstract Motion blur due
More informationAn Analysis of Focus Sweep for Improved 2D Motion Invariance
3 IEEE Conference on Computer Vision and Pattern Recognition Workshops An Analysis of Focus Sweep for Improved D Motion Invariance Yosuke Bando TOSHIBA Corporation yosuke.bando@toshiba.co.jp Abstract Recent
More informationRemoving Temporal Stationary Blur in Route Panoramas
Removing Temporal Stationary Blur in Route Panoramas Jiang Yu Zheng and Min Shi Indiana University Purdue University Indianapolis jzheng@cs.iupui.edu Abstract The Route Panorama is a continuous, compact
More informationTonemapping and bilateral filtering
Tonemapping and bilateral filtering http://graphics.cs.cmu.edu/courses/15-463 15-463, 15-663, 15-862 Computational Photography Fall 2018, Lecture 6 Course announcements Homework 2 is out. - Due September
More information2D Barcode Localization and Motion Deblurring Using a Flutter Shutter Camera
2D Barcode Localization and Motion Deblurring Using a Flutter Shutter Camera Wei Xu University of Colorado at Boulder Boulder, CO, USA Wei.Xu@colorado.edu Scott McCloskey Honeywell Labs Minneapolis, MN,
More informationApplications of Flash and No-Flash Image Pairs in Mobile Phone Photography
Applications of Flash and No-Flash Image Pairs in Mobile Phone Photography Xi Luo Stanford University 450 Serra Mall, Stanford, CA 94305 xluo2@stanford.edu Abstract The project explores various application
More informationSimulated Programmable Apertures with Lytro
Simulated Programmable Apertures with Lytro Yangyang Yu Stanford University yyu10@stanford.edu Abstract This paper presents a simulation method using the commercial light field camera Lytro, which allows
More informationBurst Photography! EE367/CS448I: Computational Imaging and Display! stanford.edu/class/ee367! Lecture 7! Gordon Wetzstein! Stanford University!
Burst Photography! EE367/CS448I: Computational Imaging and Display! stanford.edu/class/ee367! Lecture 7! Gordon Wetzstein! Stanford University! Motivation! wikipedia! exposure sequence! -4 stops! Motivation!
More informationDe-Convolution of Camera Blur From a Single Image Using Fourier Transform
De-Convolution of Camera Blur From a Single Image Using Fourier Transform Neha B. Humbe1, Supriya O. Rajankar2 1Dept. of Electronics and Telecommunication, SCOE, Pune, Maharashtra, India. Email id: nehahumbe@gmail.com
More informationSURVEILLANCE SYSTEMS WITH AUTOMATIC RESTORATION OF LINEAR MOTION AND OUT-OF-FOCUS BLURRED IMAGES. Received August 2008; accepted October 2008
ICIC Express Letters ICIC International c 2008 ISSN 1881-803X Volume 2, Number 4, December 2008 pp. 409 414 SURVEILLANCE SYSTEMS WITH AUTOMATIC RESTORATION OF LINEAR MOTION AND OUT-OF-FOCUS BLURRED IMAGES
More informationHigh dynamic range imaging and tonemapping
High dynamic range imaging and tonemapping http://graphics.cs.cmu.edu/courses/15-463 15-463, 15-663, 15-862 Computational Photography Fall 2017, Lecture 12 Course announcements Homework 3 is out. - Due
More informationRegion Based Robust Single Image Blind Motion Deblurring of Natural Images
Region Based Robust Single Image Blind Motion Deblurring of Natural Images 1 Nidhi Anna Shine, 2 Mr. Leela Chandrakanth 1 PG student (Final year M.Tech in Signal Processing), 2 Prof.of ECE Department (CiTech)
More informationRecent Advances in Space-variant Deblurring and Image Stabilization
Recent Advances in Space-variant Deblurring and Image Stabilization Michal Šorel, Filip Šroubek and Jan Flusser Abstract The blur caused by camera motion is a serious problem in many areas of optical imaging
More informationBlur and Recovery with FTVd. By: James Kerwin Zhehao Li Shaoyi Su Charles Park
Blur and Recovery with FTVd By: James Kerwin Zhehao Li Shaoyi Su Charles Park Blur and Recovery with FTVd By: James Kerwin Zhehao Li Shaoyi Su Charles Park Online: < http://cnx.org/content/col11395/1.1/
More informationOptical image stabilization (IS)
Optical image stabilization (IS) CS 178, Spring 2013 Begun 4/30/13, finished 5/2/13. Marc Levoy Computer Science Department Stanford University Outline what are the causes of camera shake? how can you
More informationLast Lecture. photomatix.com
Last Lecture photomatix.com HDR Video Assorted pixel (Single Exposure HDR) Assorted pixel Assorted pixel Pixel with Adaptive Exposure Control light attenuator element detector element T t+1 I t controller
More informationWavefront coding. Refocusing & Light Fields. Wavefront coding. Final projects. Is depth of field a blur? Frédo Durand Bill Freeman MIT - EECS
6.098 Digital and Computational Photography 6.882 Advanced Computational Photography Final projects Send your slides by noon on Thrusday. Send final report Refocusing & Light Fields Frédo Durand Bill Freeman
More informationSupplementary Materials
NIMISHA, ARUN, RAJAGOPALAN: DICTIONARY REPLACEMENT FOR 3D SCENES 1 Supplementary Materials Dictionary Replacement for Single Image Restoration of 3D Scenes T M Nimisha ee13d037@ee.iitm.ac.in M Arun ee14s002@ee.iitm.ac.in
More informationA Novel Image Deblurring Method to Improve Iris Recognition Accuracy
A Novel Image Deblurring Method to Improve Iris Recognition Accuracy Jing Liu University of Science and Technology of China National Laboratory of Pattern Recognition, Institute of Automation, Chinese
More informationModeling and Synthesis of Aperture Effects in Cameras
Modeling and Synthesis of Aperture Effects in Cameras Douglas Lanman, Ramesh Raskar, and Gabriel Taubin Computational Aesthetics 2008 20 June, 2008 1 Outline Introduction and Related Work Modeling Vignetting
More informationRemoving Camera Shake from a Single Photograph
IEEE - International Conference INDICON Central Power Research Institute, Bangalore, India. Sept. 6-8, 2007 Removing Camera Shake from a Single Photograph Sundaresh Ram 1, S.Jayendran 1 1 Velammal Engineering
More informationRemoving Motion Blur with Space-Time Processing
1 Removing Motion Blur with Space-Time Processing Hiroyuki Takeda, Student Member, IEEE, Peyman Milanfar, Fellow, IEEE Abstract Although spatial deblurring is relatively well-understood by assuming that
More informationExtended Depth of Field Catadioptric Imaging Using Focal Sweep
Extended Depth of Field Catadioptric Imaging Using Focal Sweep Ryunosuke Yokoya Columbia University New York, NY 10027 yokoya@cs.columbia.edu Shree K. Nayar Columbia University New York, NY 10027 nayar@cs.columbia.edu
More informationBlind Correction of Optical Aberrations
Blind Correction of Optical Aberrations Christian J. Schuler, Michael Hirsch, Stefan Harmeling, and Bernhard Schölkopf Max Planck Institute for Intelligent Systems, Tübingen, Germany {cschuler,mhirsch,harmeling,bs}@tuebingen.mpg.de
More informationIMAGE TAMPERING DETECTION BY EXPOSING BLUR TYPE INCONSISTENCY. Khosro Bahrami and Alex C. Kot
24 IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP) IMAGE TAMPERING DETECTION BY EXPOSING BLUR TYPE INCONSISTENCY Khosro Bahrami and Alex C. Kot School of Electrical and
More informationPAPER An Image Stabilization Technology for Digital Still Camera Based on Blind Deconvolution
1082 IEICE TRANS. INF. & SYST., VOL.E94 D, NO.5 MAY 2011 PAPER An Image Stabilization Technology for Digital Still Camera Based on Blind Deconvolution Haruo HATANAKA a), Member, Shimpei FUKUMOTO, Haruhiko
More informationFlexible Depth of Field Photography
TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE 1 Flexible Depth of Field Photography Sujit Kuthirummal, Hajime Nagahara, Changyin Zhou, and Shree K. Nayar Abstract The range of scene depths
More informationWhy learn about photography in this course?
Why learn about photography in this course? Geri's Game: Note the background is blurred. - photography: model of image formation - Many computer graphics methods use existing photographs e.g. texture &
More informationFlexible Depth of Field Photography
TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE 1 Flexible Depth of Field Photography Sujit Kuthirummal, Hajime Nagahara, Changyin Zhou, and Shree K. Nayar Abstract The range of scene depths
More informationlecture 24 image capture - photography: model of image formation - image blur - camera settings (f-number, shutter speed) - exposure - camera response
lecture 24 image capture - photography: model of image formation - image blur - camera settings (f-number, shutter speed) - exposure - camera response - application: high dynamic range imaging Why learn
More informationA New Method for Eliminating blur Caused by the Rotational Motion of the Images
A New Method for Eliminating blur Caused by the Rotational Motion of the Images Seyed Mohammad Ali Sanipour 1, Iman Ahadi Akhlaghi 2 1 Department of Electrical Engineering, Sadjad University of Technology,
More information2990 IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 20, NO. 10, OCTOBER We assume that the exposure time stays constant.
2990 IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL 20, NO 0, OCTOBER 20 Correspondence Removing Motion Blur With Space Time Processing Hiroyuki Takeda, Member, IEEE, and Peyman Milanfar, Fellow, IEEE Abstract
More information