Design of a new sharpening filter

Georgios Aim. Skianis; Dimitrios A. Vaiopoulos; Konstantinos G. Nikolakopoulos

doi:10.1117/12.565730

10 November 2004 Design of a new sharpening filter

Georgios Aim. Skianis, Dimitrios A. Vaiopoulos, Konstantinos G. Nikolakopoulos

Proceedings Volume 5573, Image and Signal Processing for Remote Sensing X; (2004) https://doi.org/10.1117/12.565730
Event: Remote Sensing, 2004, Maspalomas, Canary Islands, Spain

Abstract

In the present paper is designed a new sharpening filter, whose response is controlled by two characteristic positive parameters b and k. Using the Fourier transform, it is studied the effect of this filter on two-dimensional signals of radial symmetry. It is observed that certain deformations may be produced, if the signal has the shape of a rapidly changing pulse. These deformations are more obvious for small b values. If the signal is smooth (gaussian type), no deformations are observed. Convolution masks are then constructed at the image domain, which simulate the filter response at frequency domain. The masks are applied on a satellite image and their effect is compared to that of other frequently used sharpening filters. It is observed that for proper b and k values the proposed filter produces images with an enhanced tonality contrast and with no high frequency noise. The general conclusion is that the proposed filter is successful in enhancing tonality differences between adjacent pixels. For different values of the parameters k and b, different tonality contrasts may be obtained. The potential user is encouraged to try on various k and b values, in order to obtain the optimum result for the area under study.

Citation Download Citation

Georgios Aim. Skianis, Dimitrios A. Vaiopoulos, and Konstantinos G. Nikolakopoulos "Design of a new sharpening filter", Proc. SPIE 5573, Image and Signal Processing for Remote Sensing X, (10 November 2004); https://doi.org/10.1117/12.565730

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