Title :
Image sharpening using DFT based matrix fractional order differentiator
Author :
Su-Ling Lee;Chien-Cheng Tseng
Author_Institution :
Depart. of Computer Sci. and Information Engi., Chang-Jung Christian University, Tainan, Taiwan
Abstract :
In this paper, the image sharpening methods using discrete Fourier transform (DFT) based matrix fractional order differentiator (MFOD) are presented. The design of fractional order differentiator (FOD) is first reviewed and the design method of DFT-based MFOD is described. Then, two image sharpening methods are studied. One method is based on Mach band effect, the other approach uses Laplacian operator. Finally, several examples are demonstrated to show the effectiveness of the proposed DFT-based MFOD method.
Keywords :
"Discrete Fourier transforms","Finite impulse response filters","Laplace equations","Information and communication technology","IIR filters","Symmetric matrices","Frequency response"
Conference_Titel :
Communications and Information Technologies (ISCIT), 2015 15th International Symposium on
DOI :
10.1109/ISCIT.2015.7458310
