Method shrinkZ

ij/src/main/java/ij/plugin/Binner.java:117–146

(ImageStack stack, int zshrink)

	}
	
	private ImageStack shrinkZ(ImageStack stack, int zshrink) {
		int w = stack.getWidth();
		int h = stack.getHeight();
		int d = stack.size();
		int d2 = d/zshrink;
		ImageStack stack2 = new ImageStack (w, h, stack.getColorModel());
		for (int z=1; z<=d2; z++)
			stack2.addSlice(stack.getProcessor(z).duplicate());
		if (method==MEDIAN) // median z-binning does not work 
			method = AVERAGE;
		boolean rgb = stack.getBitDepth()==24;
		ImageProcessor ip = rgb?new ColorProcessor(d, h):new FloatProcessor(d, h);
		for (int x=0; x<w; x++) {
			IJ.showProgress(x+1, w);
			for (int y=0; y<h; y++) {
				float value;
				for (int z=0; z<d; z++) {
					value = (float)stack.getVoxel(x, y, z);
					ip.setf(z, y, value);
				}
			}
			ImageProcessor ip2 = shrink(ip, zshrink, 1, method);
			for (int x2=0; x2<d2; x2++) {
				for (int y2=0; y2<h; y2++) {
					stack2.setVoxel(x, y2, x2, ip2.getf(x2,y2));
				}
			}
		}
		return stack2;
	}
		
	public ImageProcessor shrink(ImageProcessor ip, int xshrink, int yshrink, int method) {
		this.xshrink = xshrink;