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Reseach Article

Image Enhancement Techniques using Highpass and Lowpass Filters

by Aziz Makandar, Bhagirathi Halalli
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 109 - Number 14
Year of Publication: 2015
Authors: Aziz Makandar, Bhagirathi Halalli
10.5120/19256-0999

Aziz Makandar, Bhagirathi Halalli . Image Enhancement Techniques using Highpass and Lowpass Filters. International Journal of Computer Applications. 109, 14 ( January 2015), 21-27. DOI=10.5120/19256-0999

@article{ 10.5120/19256-0999,
author = { Aziz Makandar, Bhagirathi Halalli },
title = { Image Enhancement Techniques using Highpass and Lowpass Filters },
journal = { International Journal of Computer Applications },
issue_date = { January 2015 },
volume = { 109 },
number = { 14 },
month = { January },
year = { 2015 },
issn = { 0975-8887 },
pages = { 21-27 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume109/number14/19256-0999/ },
doi = { 10.5120/19256-0999 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T22:44:47.038809+05:30
%A Aziz Makandar
%A Bhagirathi Halalli
%T Image Enhancement Techniques using Highpass and Lowpass Filters
%J International Journal of Computer Applications
%@ 0975-8887
%V 109
%N 14
%P 21-27
%D 2015
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Digital image processing refers to the process of digital images by means of digital computer. The main application area in digital image processing is to enhance the pictorial data for human interpretation. In image acquisition some of the unwanted information is present that will be removed by several preprocessing techniques. Filtering helps to enhance the image by removing noise. The aim of this paper is to demonstrate the lowpass and highpass filtering techniques, however they are the filtering techniques used in Fourier and Wavelet Transformations. In Wavelet Transform these two filters play an important role in reconstructing the original image by using subband coding. Lowpass filter will produce a Gaussian smoothing blur image, in the other hand, high pass filter will increase the contrast between bright and dark pixel to produce a sharpen image.

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Index Terms

Computer Science
Information Sciences

Keywords

Fast Fourier Transform (FFT) Lowpass Filter Highpass Filter Wavelet Transform.