Improved Edge Awareness in Discontinuity Preserving Smoothing

03/30/2011
by   Stuart B. Heinrich, et al.
0

Discontinuity preserving smoothing is a fundamentally important procedure that is useful in a wide variety of image processing contexts. It is directly useful for noise reduction, and frequently used as an intermediate step in higher level algorithms. For example, it can be particularly useful in edge detection and segmentation. Three well known algorithms for discontinuity preserving smoothing are nonlinear anisotropic diffusion, bilateral filtering, and mean shift filtering. Although slight differences make them each better suited to different tasks, all are designed to preserve discontinuities while smoothing. However, none of them satisfy this goal perfectly: they each have exception cases in which smoothing may occur across hard edges. The principal contribution of this paper is the identification of a property we call edge awareness that should be satisfied by any discontinuity preserving smoothing algorithm. This constraint can be incorporated into existing algorithms to improve quality, and usually has negligible changes in runtime performance and/or complexity. We present modifications necessary to augment diffusion and mean shift, as well as a new formulation of the bilateral filter that unifies the spatial and range spaces to achieve edge awareness.

READ FULL TEXT

page 2

page 3

page 7

page 8

page 10

page 11

page 12

page 13

research
12/27/2021

Image Edge Restoring Filter

In computer vision, image processing and computer graphics, image smooth...
research
04/02/2019

A Benchmark for Edge-Preserving Image Smoothing

Edge-preserving image smoothing is an important step for many low-level ...
research
04/30/2014

A General Framework for Bilateral and Mean Shift Filtering

We present a generalization of the bilateral filter that can be applied ...
research
01/30/2022

A least squares support vector regression for anisotropic diffusion filtering

Anisotropic diffusion filtering for signal smoothing as a low-pass filte...
research
05/17/2013

Sparse Norm Filtering

Optimization-based filtering smoothes an image by minimizing a fidelity ...
research
08/11/2021

One-Sided Box Filter for Edge Preserving Image Smoothing

Image smoothing is a fundamental task in signal processing. For such tas...
research
03/25/2015

A Brief Survey of Recent Edge-Preserving Smoothing Algorithms on Digital Images

Edge preserving filters preserve the edges and its information while blu...

Please sign up or login with your details

Forgot password? Click here to reset