Method getProcessor

ij/src/main/java/ij/ImageStack.java:315–343

Returns an ImageProcessor for the specified slice, where {@literal 1<=n<=nslices}. Returns null if the stack is empty.

(int n)

 	 * Returns null if the stack is empty.
 	*/
 	public ImageProcessor getProcessor(int n) {
		ImageProcessor ip;
		if (n<1 || n>nSlices)
			throw new IllegalArgumentException(outOfRange+n);
		if (nSlices==0)
			return null;
		if (stack[n-1]==null)
			throw new IllegalArgumentException("Pixel array is null");
		if (stack[n-1] instanceof byte[])
			ip = new ByteProcessor(width, height, null, cm);
		else if (stack[n-1] instanceof short[])
			ip = new ShortProcessor(width, height, null, cm);
		else if (stack[n-1] instanceof int[]) {
			if (signedInt)
				ip = new IntProcessor(width, height);
			else
				ip = new ColorProcessor(width, height, null);
		} else if (stack[n-1] instanceof float[])
			ip = new FloatProcessor(width, height, null, cm);		
		else
			throw new IllegalArgumentException("Unknown stack type");
		ip.setPixels(stack[n-1]);
		if (min!=Double.MAX_VALUE && ip!=null && !(ip instanceof ColorProcessor))
			ip.setMinAndMax(min, max);
		if (cTable!=null)
			ip.setCalibrationTable(cTable);
		ip.setSliceNumber(n);
		return ip;
	}
	
	/** Assigns the pixel array of an ImageProcessor to the specified slice,
	 * where {@literal 1<=n<=nslices}.