Noise and visual perception [Instrumentation Notes]

Author

Andò, Bruno

Author_Institution

Univ. of Catania, Catania, Italy

Volume

15

Issue

2

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

45

Lastpage

48

Abstract

The inability to read text and to distinguish images is a primary complaint of people with visual impairments. Several attempts have been made to develop methods (simple and complex) of enhancing images and videos for the visually impaired. The first approaches used dedicated spatial filtering to enhance those spatial frequencies that are not detectable by a depressed preceptor at their naturally occurring low contrast [1] - [5]. A few modifications of this contrast enhancement approach have been investigated by applying wide-band enhancement by superposition of high contrast outlines over the images as well as band pass enhancement implemented in the MPEG compression domain [6], [7].

Keywords

band-pass filters; image denoising; image enhancement; medical image processing; spatial filters; video signal processing; vision defects; visual perception; MPEG compression domain; band pass enhancement; depressed preceptor; image denoising; image enhancement; naturally occurring low contrast enhancement; noise; spatial filtering; spatial frequencies; text reading; videos; visual impairments; visual perception; wide-band enhancement; Noise measurement; Sensitivity; Text recognition; Visual perception; Visualization;

fLanguage

English

Journal_Title

Instrumentation & Measurement Magazine, IEEE

Publisher

ieee

ISSN

1094-6969

Type

jour

DOI

10.1109/MIM.2012.6174580

Filename

6174580