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Natural Image Matting

by E. Trucco, M. Chantler (editors, Peter M Hillman, John M Hannah
"... Matte pulling — generating greyscale images which indicate segmentation of images into elements with subpixel accuracy and where blur causes pixels to be a mixture of elements — has received attention in recent years. Many of the algorithms are too slow or too unpredictable to be of practical use in ..."
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Matte pulling — generating greyscale images which indicate segmentation of images into elements with subpixel accuracy and where blur causes pixels to be a mixture of elements — has received attention in recent years. Many of the algorithms are too slow or too unpredictable to be of practical use

Non-parametric natural image matting

by Muhammad Sarim, Adrian Hilton, Jean-yves Guillemaut, Hansung Kim - in ICIP ’09
"... Natural image matting is an extremely challenging image processing problem due to its ill-posed nature. It often requires skilled user interaction to aid definition of foreground and background regions. Current algorithms use these predefined regions to build local foreground and background colour m ..."
Abstract - Cited by 1 (1 self) - Add to MetaCart
Natural image matting is an extremely challenging image processing problem due to its ill-posed nature. It often requires skilled user interaction to aid definition of foreground and background regions. Current algorithms use these predefined regions to build local foreground and background colour

A Closed-Form Solution to Natural Image Matting

by Anat Levin, Dani Lischinski, Yair Weiss - IEEE TRANS. PAMI , 2008
"... Interactive digital matting, the process of extracting a foreground object from an image based on limited user input, is an important task in image and video editing. From a computer vision perspective, this task is extremely challenging because it is massively ill-posed—at each pixel we must estim ..."
Abstract - Cited by 136 (2 self) - Add to MetaCart
, or perform iterative nonlinear estimation by alternating foreground and background color estimation with alpha estimation. In this paper, we present a closed-form solution to natural image matting. We derive a cost function from local smoothness assumptions on foreground and background colors and show

A closed form solution to natural image matting

by Anat Levin, Dani Lischinski, Yair Weiss - Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
"... Interactive digital matting, the process of extracting a foreground object from an image based on limited user input, is an important task in image and video editing. From a computer vision perspective, this task is extremely challenging because it is massively ill-posed — at each pixel we must esti ..."
Abstract - Cited by 110 (3 self) - Add to MetaCart
, or perform iterative nonlinear estimation by alternating foreground and background color estimation with alpha estimation. In this paper we present a closed form solution to natural image matting. We derive a cost function from local smoothness assumptions on foreground and background colors, and show

Natural Image Matting with Total Variation

by Stephen Tierney, Junbin Gao
"... Abstract—Image mating is the process of isolating the fore-ground in images and video. This task is challenging as it is severely under constrained. At each pixel we must estimate the foreground and background colour and the blending between them (alpha value). Most approaches calculate an affinity ..."
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Abstract—Image mating is the process of isolating the fore-ground in images and video. This task is challenging as it is severely under constrained. At each pixel we must estimate the foreground and background colour and the blending between them (alpha value). Most approaches calculate an affinity

New Appearance Models for Natural Image Matting

by Dheeraj Singaraju, Carsten Rother, Christoph Rhemann
"... Image matting is the task of estimating a fore- and background layer from a single image. To solve this ill posed problem, an accurate modeling of the scene’s appearance is necessary. Existing methods that provide a closed form solution to this problem, assume that the colors of the foreground and b ..."
Abstract - Cited by 8 (1 self) - Add to MetaCart
Image matting is the task of estimating a fore- and background layer from a single image. To solve this ill posed problem, an accurate modeling of the scene’s appearance is necessary. Existing methods that provide a closed form solution to this problem, assume that the colors of the foreground

Natural image matting for multiple widebaseline views

by Muhammad Sarim, Adrian Hilton, Jean-yves Guillemaut, Takeshi Takai, Hansung Kim - in ICIP , 2010
"... In this paper we present a novel approach to estimate the alpha mattes of a foreground object captured by a widebaseline circular camera rig provided a single key frame trimap. Bayesian inference coupled with camera calibration information are used to propagate high confidence trimaps labels across ..."
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and similarity in foreground/background appearance for cameras with opposing views enabling high quality alpha matte extraction using any state-of-the-art image matting algorithm. Index Terms — Image matting, alpha matte, trimap, wide-baseline, multiple views.

Relations between the statistics of natural images and the response properties of cortical cells

by David J. Field - J. Opt. Soc. Am. A , 1987
"... The relative efficiency of any particular image-coding scheme should be defined only in relation to the class of images that the code is likely to encounter. To understand the representation of images by the mammalian visual system, it might therefore be useful to consider the statistics of images f ..."
Abstract - Cited by 831 (18 self) - Add to MetaCart
from the natural environment (i.e., images with trees, rocks, bushes, etc). In this study, various coding schemes are compared in relation to how they represent the information in such natural images. The coefficients of such codes are represented by arrays of mechanisms that respond to local regions

Representing Moving Images with Layers

by John Y.A. Wang, Edward H. Adelson , 1994
"... We describe a system for representing moving images with sets of overlapping layers. Each layer contains an intensity map that defines the additive values of each pixel, along with an alpha map that serves as a mask indicating the transparency. The layers are ordered in depth and they occlude each o ..."
Abstract - Cited by 542 (11 self) - Add to MetaCart
other in accord with the rules of compositing. Velocity maps define how the layers are to be warped over time. The layered representation is more flexible than standard image transforms and can capture many important properties of natural image sequences. We describe some methods for decomposing image

Basic objects in natural categories

by Eleanor Rosch, Carolyn B. Mervis, Wayne D. Gray, David M. Johnson, Penny Boyes-braem - COGNITIVE PSYCHOLOGY , 1976
"... Categorizations which humans make of the concrete world are not arbitrary but highly determined. In taxonomies of concrete objects, there is one level of abstraction at which the most basic category cuts are made. Basic categories are those which carry the most information, possess the highest categ ..."
Abstract - Cited by 892 (1 self) - Add to MetaCart
to be the most inclusive categories for which a concrete image of the category as a whole can be formed, to be the first categorizations made during perception of the environment, to be the earliest categories sorted and earliest named by children, and to be the categories
Results 1 - 10 of 21,668