Implementing scene high frequency decay calculation/reporting

src/main/java/com/elphel/imagej/common/DoubleFHT.java

@@ -2424,7 +2424,27 @@ public class DoubleFHT {
 		return amp;
 	}
 
-	public double[] calculateAmplitudeNoSwap(double[] fht) {
+	public double [] getFreqAmplitude(
+			double [] data) {
+		updateMaxN(data);
+		swapQuadrants(data);
+		if (!transform(data, false))
+			return null; // direct FHT
+		double [] amp = calculateAmplitude(data);
+		return amp;
+	}
+	public double [] getFreqAmplitude2(
+			double [] data) {
+		updateMaxN(data);
+		swapQuadrants(data);
+		if (!transform(data, false))
+			return null; // direct FHT
+		double [] amp = calculateAmplitude2(data);
+		return amp;
+	}
+	
+	
+	public static double[] calculateAmplitudeNoSwap(double[] fht) {
 		int size = (int) Math.sqrt(fht.length);
 		double[] amp = new double[size * size];
 		for (int row = 0; row < size; row++) {
@@ -2473,7 +2493,7 @@ public class DoubleFHT {
 	}
 
 	/* Amplitude of one row from 2D Hartley Transform. */
-	void amplitude(int row, int size, double[] fht, double[] amplitude) {
+	static void amplitude(int row, int size, double[] fht, double[] amplitude) {
 		int base = row * size;
 		int l;
 		for (int c = 0; c < size; c++) {
@@ -2495,7 +2515,7 @@ public class DoubleFHT {
 	}
 
 	/* Squared amplitude of one row from 2D Hartley Transform. */
-	void amplitude2(int row, int size, double[] fht, double[] amplitude) {
+	static void amplitude2(int row, int size, double[] fht, double[] amplitude) {
 		int base = row * size;
 		int l;
 		for (int c = 0; c < size; c++) {