Nonlinear Optical Median Filtering By Time-Sequential Threshold Decomposition

James M. Hereford; William T. Rhodes

doi:10.1117/12.947045

18 July 1988 Nonlinear Optical Median Filtering By Time-Sequential Threshold Decomposition

James M. Hereford, William T. Rhodes

Proceedings Volume 0939, Hybrid Image and Signal Processing; (1988) https://doi.org/10.1117/12.947045
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

Abstract

Median filtering of binary imagery can be performed by optically convolving the input image with a disk or other binary spread function and thresholding the output. This technique can be applied to median filtering of gray-scale images if the input is decomposed into a sequence of binary "slices" by a variable thresholding operation (threshold decomposition). The binary slices are median-filtered and are then added to produce the output gray-scale image. Median filtering to remove "salt-and-pepper" noise from a gray-scale image is demonstrated. The use of gray-scale (as opposed to binary) convolution kernels allows extension of the method to a more general class of nonlinear filtering operations. Comparisons with recently proposed spatial multiplexing (as opposed to time-sequential) methods are made.

Citation Download Citation

James M. Hereford and William T. Rhodes "Nonlinear Optical Median Filtering By Time-Sequential Threshold Decomposition", Proc. SPIE 0939, Hybrid Image and Signal Processing, (18 July 1988); https://doi.org/10.1117/12.947045

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Digital filtering

Binary data

Image filtering

Filtering (signal processing)

Nonlinear filtering

Optical filters

Convolution

Show All Keywords

Keywords/Phrases

Search In:

Publication Years