Journal ArticleDOI
Separation of Transparent Layers using Focus
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TLDR
This work proposes a method for self calibration of the blur kernels, given the raw images, which are sought to minimize the mutual information of the recovered layers.Abstract:
Consider situations where the depth at each point in the scene is multi-valued, due to the presence of a virtual image semi-reflected by a transparent surface. The semi-reflected image is linearly superimposed on the image of an object that is behind the transparent surface. A novel approach is proposed for the separation of the superimposed layers. Focusing on either of the layers yields initial separation, but crosstalk remains. The separation is enhanced by mutual blurring of the perturbing components in the images. However, this blurring requires the estimation of the defocus blur kernels. We thus propose a method for self calibration of the blur kernels, given the raw images. The kernels are sought to minimize the mutual information of the recovered layers. Autofocusing and depth estimation in the presence of semi-reflections are also considered. Experimental results are presented.read more
Citations
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Journal ArticleDOI
Light field microscopy
TL;DR: The Light Field Microscope (LFM) as discussed by the authors uses 3D deconvolution to produce a set of cross-sections, which can then be visualized using volume rendering.
Proceedings ArticleDOI
Single Image Layer Separation Using Relative Smoothness
Yu Li,Michael S. Brown +1 more
TL;DR: This paper addresses extracting two layers from an image where one layer is smoother than the other by introducing a novel strategy that regularizes the gradients of the two layers such that one has a long tail distribution and the other a short tail distribution.
Journal ArticleDOI
Removing photography artifacts using gradient projection and flash-exposure sampling
TL;DR: A novel gradient projection scheme based on a gradient coherence model that allows removal of reflections and highlights from flash images and a brightness-ratio based algorithm that allows for the falloff in the flash image brightness due to depth is presented.
Journal ArticleDOI
An Improved Joint Optimization of Multiple Level Set Functions for the Segmentation of Overlapping Cervical Cells
TL;DR: An improved algorithm for the segmentation of cytoplasm and nuclei from clumps of overlapping cervical cells is presented and it is demonstrated that the method of cell nuclei segmentation is competitive when compared with the current state of the art.
Proceedings ArticleDOI
A Generic Deep Architecture for Single Image Reflection Removal and Image Smoothing
TL;DR: In this article, a deep neural network structure that exploits edge information in addressing representative low-level vision tasks such as layer separation and image filtering is proposed, which tackles these challenging problems by estimating edges and reconstructing images using only cascaded convolutional layers arranged such that no handcrafted or application-specific image-processing components are required.
References
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Paul A. Viola,William M. Wells +1 more
TL;DR: A new information-theoretic approach is presented for finding the pose of an object in an image that works well in domains where edge or gradient-magnitude based methods have difficulty, yet it is more robust than traditional correlation.
Journal ArticleDOI
A Perspective on Range Finding Techniques for Computer Vision
TL;DR: A variety of approaches to generalized range finding are surveyed and a perspective on their applicability and shortcomings in the context of computer vision studies is presented.
Journal ArticleDOI
Optical Sectioning Microscopy: Cellular Architecture in Three Dimensions
TL;DR: The advent of relatively inexpensive computers and digital image acquisition systems has now made possible the three-dimensional reconstruction of images taken from the optical microscope.