Method sqr

ij/src/main/java/ij/process/FHT.java:535–537

(float x)

	}

	private float sqr(float x) {
		return x*x;
	}

	/**	Swap quadrants 1 and 3 and 2 and 4 of the specified ImageProcessor 
		so the power spectrum origin is at the center of the image.