NDLI: Uniform depth region-based registration between colour channels and its application to single camera-based multifocusing

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Uniform depth region-based registration between colour channels and its application to single camera-based multifocusing

Content Provider	IET Digital Library
Author	Lee, Jinhee Paik, Joonki
Abstract	This study presents a spatially varying image registration method based on regions of the same depth. The proposed registration method uses phase correlation matching to measure colour shifting vectors (CSVs) between colour channels in a pre-specified region of the same distance to the camera, and aligns colour channels of the corresponding region according to the CSV. The authors also present the foreground region detection method by using binary edge labelling and analysis of histograms of channel-shifting features. The major contribution of this study is 2-fold: (i) the proposed method can be considered as a region-wise approximated version of fully non-rigid registration, which is widely used in the medical imaging area, and (ii) it can compensate misalignment between red (R), green (G) and blue (B) colour channels caused by refraction and chromatic aberration of a multiple colour-filtered aperture (MCA) camera, which has been proposed as a single camera-based multifocusing system. Among various applications of non-rigid image registration, the proposed region-based registration method is particularly suitable for multifocusing images acquired by an MCA camera. In depth analysis of each step of the proposed algorithm is provided with experimental results, and its application to the MCA camera is also provided to realise efficient depth estimation and highly accurate multifocusing functions using a single camera. Without using joint histogram or geometric transformation, the proposed region-adaptive approach successfully approximates the fully non-rigid registration with significantly reduced amount of computation.
Starting Page	50
Ending Page	60
Page Count	11
ISSN	17519659
Volume Number	7
e-ISSN	17519667
Issue Number	Issue 1, Feb (2013)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-ipr/7/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2011.0171
Journal	IET Image Processing
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Binary Edge Labelling Channel-shifting Features Chromatic Aberration Colour Channel Colour Shifting Vector Computer Vision And Image Processing Technique Depth Analysis Depth Estimation Foreground Region Detection Method Fully Nonrigid Registration Highly Accurate Multifocusing Function Histograms Image Colour Analysis Image Matching Image Registration MCA Camera Medical Imaging Area Multifocusing Image Multiple Colour-filtered Aperture Camera Nonrigid Image Registration Optical, Image And Video Signal Processing Phase Correlation Matching Refraction Region-adaptive Approach Region-based Registration Method Region-wise Approximated Version Single Camera-based Multifocusing System Spatially Varying Image Registration Method Uniform Depth Region-based Registration
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software

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