macro 'Image Enhancement [4]' {
	dir = getDirectory("Choose a Directory ");
	list = getFileList(dir);
	start = getTime();
	for (i=0; i<list.length; i++) {
		path = dir+list[i];
		open(path);
		title = getTitle();
		run("Enhance Contrast", "saturated=2 normalize");
		run("Median...", "radius=2"); // median filter replaces pixel with median of neighbors - removes noise
		run("Sharpen");
		run("Median...", "radius=2");
		run("Subtract...", "value=1"); // so white (255) is thresholded
		run("Tiff...", "save=["+path+"]");
		num= i+1;
		tot= list.length;
		print ("image= "+title+"... "+num+" of "+tot+"");
		selectImage(title);
		run("Close");
	}
print("The macro took this many seconds...")
print((getTime()-start)/1000);
}