Method amplitude

ij/src/main/java/ij/process/FHT.java:526–533

Amplitude of one row from 2D Hartley Transform.

(int row, int maxN, float[] fht, float[] amplitude)

	/** Amplitude of one row from 2D Hartley Transform. */
 	void amplitude(int row, int maxN, float[] fht, float[] amplitude) {
 		int base = row*maxN;
		int l;
		for (int c=0; c<maxN; c++) {
			l = ((maxN-row)%maxN) * maxN + (maxN-c)%maxN;
			amplitude[base+c] = (float)Math.sqrt(sqr(fht[base+c]) + sqr(fht[l]));
 		}
	}

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