Proceedings ArticleDOI
Perceptually motivated automatic sharpness enhancement using hierarchy of non-local means
Anustup Choudhury,Gerard Medioni +1 more
- pp 730-737
TLDR
This work addresses the problem of sharpness enhancement of images by proposing hierarchical techniques that decompose an image into a smooth image and high frequency components based on Gaussian filter and bilateral filter, whereas techniques based on weighted least squares extract low contrast features as detail.Abstract:
We address the problem of sharpness enhancement of images. Existing hierarchical techniques that decompose an image into a smooth image and high frequency components based on Gaussian filter and bilateral filter suffer from halo effects, whereas techniques based on weighted least squares extract low contrast features as detail. Other techniques require multiple images and are not tolerant to noise.read more
Citations
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Journal ArticleDOI
Fast Multilayer Laplacian Enhancement
Hossein Talebi,Peyman Milanfar +1 more
TL;DR: The approach builds on Laplacian operators of well-known edge-aware kernels, such as bilateral and nonlocal means, and extends these filter's capabilities to perform more effective and fast image smoothing, sharpening, and tone manipulation.
Journal ArticleDOI
Nonlocal image editing.
Hossein Talebi,Peyman Milanfar +1 more
TL;DR: This analysis shows that the mapping of the eigenvalues by an appropriate polynomial function endows the filter with a number of important capabilities, such as edge-aware sharpening, denoising, tone manipulation, and abstraction, to name a few.
Journal ArticleDOI
Measuring myofiber orientations from high-frequency ultrasound images using multiscale decompositions
Xulei Qin,Baowei Fei +1 more
TL;DR: A two-step multiscale image decomposition method that combines a nonlinear anisotropic diffusion filter and a coherence enhancing diffusion filter to extract myofibers from high-frequency ultrasound images and demonstrated the feasibility of extracting cardiac myofiber orientations from HFU images ex vivo.
Journal ArticleDOI
Unconditionally stable shock filters for image and geometry processing
Fabián Prada,Michael Kazhdan +1 more
TL;DR: This work revisits the Shock Filters of Osher and Rudin and shows how the proposed filtering process can be interpreted as the advection of image values along flow‐lines, leading to an efficient implementation that only requires tracing flow‐ lines and re‐sampling the image.
Journal ArticleDOI
Non-Linear Structure-Aware Image Sharpening with Difference of Smoothing Operators
Amin Kheradmand,Peyman Milanfar +1 more
TL;DR: The connection of the proposed data-adaptive filtering procedure with the classic Difference of Gaussians operator is established and the proposed filter renders a data- Adaptive and noise robust version of the classical DoG filter.
References
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Book ChapterDOI
Individual Comparisons by Ranking Methods
TL;DR: The comparison of two treatments generally falls into one of the following two categories: (a) a number of replications for each of the two treatments, which are unpaired, or (b) we may have a series of paired comparisons, some of which may be positive and some negative as mentioned in this paper.
Journal ArticleDOI
Mean shift: a robust approach toward feature space analysis
Dorin Comaniciu,Peter Meer +1 more
TL;DR: It is proved the convergence of a recursive mean shift procedure to the nearest stationary point of the underlying density function and, thus, its utility in detecting the modes of the density.
Proceedings ArticleDOI
Bilateral filtering for gray and color images
Carlo Tomasi,Roberto Manduchi +1 more
TL;DR: In contrast with filters that operate on the three bands of a color image separately, a bilateral filter can enforce the perceptual metric underlying the CIE-Lab color space, and smooth colors and preserve edges in a way that is tuned to human perception.
Journal ArticleDOI
The Laplacian Pyramid as a Compact Image Code
Peter J. Burt,Edward H. Adelson +1 more
TL;DR: A technique for image encoding in which local operators of many scales but identical shape serve as the basis functions, which tends to enhance salient image features and is well suited for many image analysis tasks as well as for image compression.
Journal ArticleDOI
Fast bilateral filtering for the display of high-dynamic-range images
DurandFrédo,DorseyJulie +1 more
TL;DR: A new technique for the display of high-dynamic-range images, which reduces the contrast while preserving detail, is presented, based on a two-scale decomposition of the image into a base layer.