made clt-based correlation to work correctly

src/main/java/Eyesis_Correction.java

@@ -3792,6 +3792,9 @@ private Panel panel1,
 /* ======================================================================== */
     } else if (label.equals("CLT correlate")) {
     	DEBUG_LEVEL=MASTER_DEBUG_LEVEL;
+	    runtime.gc();
+		System.out.println("--- Free memory="+runtime.freeMemory()+" (of "+runtime.totalMemory()+")");
+
 //    	IJ.showMessage("DCT test 1");
         if (!CLT_PARAMETERS.showDialog()) return;
 // process selected image stack
@@ -3997,6 +4000,7 @@ private Panel panel1,
     	for (int chn = 0; chn < clt_corr.length; chn++) {
     		image_dtt.clt_dtt2( // DCCT2, DSCT2, DCST2, DSST2 - in-place
     				clt_corr[chn],                        // final double [][][][] clt_data,
+    				true,                                 // final boolean transpose, // when doing inverse transform, the data comes in transposed form, so CS <->SC
     				THREADS_MAX,                          // maximal number of threads to launch                         
     				DEBUG_LEVEL);                        // globalDebugLevel)
     	}        	

src/main/java/ImageDtt.java

@@ -1093,6 +1093,7 @@ public class ImageDtt {
 	
 	public void clt_dtt2( // transform dcct2, dsct2, dcst2, dsst2
 			final double [][][][] data,
+			final boolean         transpose, // when doing inverse transform, the data comes in transposed form, so CS <->SC
 			final int             threadsMax,     // maximal number of threads to launch                         
 			final int             globalDebugLevel)
 	{
@@ -1112,7 +1113,8 @@ public class ImageDtt {
 						tileY = nTile/tilesX;
 						tileX = nTile - tileY * tilesX;
 						for (int quadrant = 0; quadrant < 4; quadrant++){
-							data[tileY][tileX][quadrant] = dtt.dttt_iie(data[tileY][tileX][quadrant], quadrant, dct_size);
+							int mode = transpose ? (((quadrant << 1) & 2) | ((quadrant >> 1) & 1)) : quadrant;
+							data[tileY][tileX][quadrant] = dtt.dttt_iie(data[tileY][tileX][quadrant], mode, dct_size);
 						}
 					}
 				}