/*
A macro for ImageJ(C).
Copyright (C) 2005 Albert Cardona.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation (http://www.gnu.org/licenses/gpl.txt )

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. 

You may contact Albert Cardona at albert at pensament.net, at http://www.pensament.net/java/
*/

macro "Add Noise" {
	width = getWidth();
	height = getHeight();
	run("Select All");
	run("Copy");
	newImage("Noisy", "8-bit", width, height, 1);
	run("Paste");
	for (x=0; x<width; x++) {
		for (y=0; y<height; y++) {
			pixel = getPixel(x, y);
			rand = pixel + (random() * 255) - 128;
			if (rand > 255) rand = 255;
			if (rand < 0) rand = 0;
			setPixel(x, y, rand);
		}
	}
	resetMinAndMax();
	//updateDisplay(); //this is done anyway when the macro exits
}