Method reduce

ij/src/main/java/ij/VirtualStack.java:482–496

Reduces the number of slices in this stack by a factor.

(int factor)

	/** Reduces the number of slices in this stack by a factor. */
	public void reduce(int factor) {
		if (factor<2 || nSlices/factor<1 || names==null)
			return;
		nSlices = nSlices/factor;
		for (int i=0; i<nSlices; i++) {
			names[i] = names[i*factor];
			if (labels != null)
				labels[i] = labels[i*factor];
		}
		ImagePlus imp = WindowManager.getCurrentImage();
		if (imp!=null) {
			imp.setSlice(1);
			imp.updateAndRepaintWindow();
		}
	}

}