Method getImageArg

ij/src/main/java/ij/macro/Functions.java:4436–4447

()

	}

	ImagePlus getImageArg() {
		ImagePlus img = null;
		if (isStringArg()) {
			String title = getString();
			img = WindowManager.getImage(title);
		} else {
			int id = (int)interp.getExpression();
			img = WindowManager.getImage(id);
		}
		if (img==null) interp.error("Image not found");
		return img;
	}

	void imageCalculator() {
		String operator = getFirstString();