Author:	Annalisa Cappello (annalisa.cap@katamail.com)
Advisor:	Prof. Sebastiano Battiato (battiato@dmi.unict.it)
History:	This plugin was implemented in July 2005
Works with:	8-bit grayscale images
ImageJ's version:	1.33u (used to develop this plugin)
Source:	SharpeningFilters_.java
Installation:	Download SharpeningFilters_.java to the plugins folder and compile it with the "Compile and Run" command. Restart ImageJ to add the "SharpeningFilter" command to the Plugins menu.
Description:	This plugin implements some sharpening techniques: High Boost Filtering H hb =(A-1)+H hp where A is a positive constant and Hhp is an highpass filter. High Frequency Emphasis H hfe =a+bH hp where a,b ≥ 0 and Hhp is an highpass filter.
Usage:	Here is a brief description: 1) Select the technique to use (High Boost Filtering or High Frequency Emphasis); 2) Select H hp filter (ideal, Butterworth, Gaussian or Laplacian) 3) Click on the OK button; 4) Insert the parameters of technique (a, b or A) and filter (cutoff frequency and order); 5) Click on the OK button to apply the technique to the image.
Downloads:	Annalisa Cappello, Estensione software ImageJ con tecniche di enhancement nel dominio della frequenza
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