Journal ArticleDOI
Reconstruction of perspective shifts and refocusing of a three-dimensional scene from a multi-focus image stack
TLDR
This work proposes a method for post-capture perspective shift reconstruction (in the x, y, and z directions) of a three-dimensional scene as well as refocusing with apertures of arbitrary shapes and sizes from an optimal multi-focus image stack.Abstract:
The convergence of optical imaging acquisition and image processing algorithms is a fast-evolving interdisciplinary research field focused on the reconstruction of images with novel features of interest. We propose a method for post-capture perspective shift reconstruction (in the x, y, and z directions) of a three-dimensional scene as well as refocusing with apertures of arbitrary shapes and sizes from an optimal multi-focus image stack. The approach is based on the reorganization of the acquired visual information considering a depth-variant point-spread function, which allows it to be applied to strongly defocused multi-focus image stacks. Our method is performed without estimating the depth map or segmenting the in-focus regions. A conventional camera combined with an electrically tunable lens is used for image acquisition and does not require scale transformation or registration between the acquired images. Experimental results for both real and synthetic data images are provided and compared to state-of-the-art schemes.read more
Citations
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Journal ArticleDOI
A Fourier Disparity Layer Representation for Light Fields
TL;DR: A new Light Field representation for efficient Light Field processing and rendering called Fourier Disparity Layers, which allows real-time Light Field rendering and direct applications such as view interpolation or extrapolation and denoising are presented and evaluated.
Journal ArticleDOI
Iteratively reconstructing 4D light fields from focal stacks.
TL;DR: This paper reconstructs the 4D light field from the focal stack through solving the inverse problem with a filtering-based iterative method and outperforms state-of-the-art methods in reconstruction accuracy, reduced sampling, and occluded boundaries.
Journal ArticleDOI
Light field reconstruction from projection modeling of focal stack.
Chang Liu,Jun Qiu,Ming Jiang +2 more
TL;DR: The experimental results show that the high-precision light field can be reconstructed via FBP and Simultaneous-Algebraic-Reconstruction-Technique(SART) algorithm, and depth and surface of the scene can be reconstruction via the reconstructed light field.
Journal ArticleDOI
Error analysis and correction for color in laser triangulation measurement
TL;DR: A color error compensation method is proposed, which produces a color-error library according to the error of the different colors, and can reduce the error to 10% and maintain the color measurement error to within 90 μm.
Journal ArticleDOI
Guided, Fusion-Based, Large Depth-of-field 3D Imaging Using a Focal Stack.
TL;DR: This paper proposes a novel method to extend the working range of the structured light 3D imaging system based on the focal stack and develops a prototype system that can perform high-quality measurements in the depth range of 400 mm with a measurement error of 0.08%.
References
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Proceedings ArticleDOI
Image and depth from a conventional camera with a coded aperture
TL;DR: A simple modification to a conventional camera is proposed to insert a patterned occluder within the aperture of the camera lens, creating a coded aperture, and introduces a criterion for depth discriminability which is used to design the preferred aperture pattern.
Journal ArticleDOI
Light Fields and Computational Imaging
TL;DR: A survey of the theory and practice of light field imaging emphasizes the devices researchers in computer graphics and computer vision have built to capture light fields photographically and the techniques they have developed to compute novel images from them.
Journal ArticleDOI
Deconvolution methods for 3-D fluorescence microscopy images
Pinaki Sarder,Arye Nehorai +1 more
TL;DR: This paper presents an overview of various deconvolution techniques of 3D fluorescence microscopy images and provides a summary of the microscope point-spread function (PSF), which often creates the most severe distortion in the acquired 3D image.
Journal ArticleDOI
Advances in three-dimensional integral imaging: sensing, display, and applications [Invited]
TL;DR: This Commemorative Review presents an overview of literature on physical principles and applications of integral imaging, and applications including 3D underwater imaging, 3D imaging in photon-starved environments, 2D tracking of occluded objects,3D optical microscopy, and 3D polarimetric imaging are reviewed.
Journal ArticleDOI
Microscopy refocusing and dark-field imaging by using a simple LED array
TL;DR: It is shown that such a condenser can be replaced by a programmable LED array to achieve greater imaging flexibility and functionality and can be used for dark-field imaging, bright- field imaging, microscopy sectioning, and digital refocusing.