Pattern matching

src/main/java/com/elphel/imagej/orthomosaic/OrthoMap.java

@@ -2823,6 +2823,7 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 			final int       width,
 			final int       psize,      // power of 2, such as 64
 			final double [] pattern,    // [psize*psize]
+			final boolean   convolve,   // convolve, not correlate
 			final double    phaseCoeff,
 			final int       debugLevel) {
 		final int height = data.length/width;
@@ -2849,20 +2850,22 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 		final double [] filter = null; // probably not needed
 		
 		if ((width== psize) && (height == psize)) {
-			testPhaseCorr(
-					data,    // double [] data,
-					pattern, // double [] pattern,
-					window, // double [] wnd,
+			return testPhaseCorr(
+					data,        // double [] data,
+					pattern,     // double [] pattern,
+					convolve,    //final boolean   convolve,   // convolve, not correlate
+					window,      // double [] wnd,
 					phaseCoeff); // double    phaseCoeff)
-			return data;
 		}
 		
 		final int tilesX = (int) Math.ceil(width/(psize/2)) + 1;
 		final int tilesY = (int) Math.ceil(height/(psize/2)) + 1;
 		final Thread[] threads = ImageDtt.newThreadArray();
 		final AtomicInteger ai = new AtomicInteger(0);
-		final int dbg_tileX = -20;
-		final int dbg_tileY =  -1;
+//		final int dbg_tileX = 20;
+//		final int dbg_tileY =  1;
+	    final int dbg_x = -2668;
+	    final int dbg_y =  256;
 		for (int passY = 0; passY < 2; passY++) { // to isolate threads results - no overlap
 			final int tileY0=passY;
 			final int ntilesY=(tilesY + 1 - passY)/ 2;
@@ -2880,15 +2883,13 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 							for (int nTile = ai.getAndIncrement(); nTile < ntiles; nTile = ai.getAndIncrement()){
 								int tileX = tileX0 - 1 + 2 * (nTile % ntilesX); // nTile % ntilesX;
 								int tileY = tileY0 - 1 + 2 * (nTile / ntilesX); // nTile / ntilesX;
-								boolean dbg_tile = (Math.abs(tileX - dbg_tileX) < 1) && (Math.abs(tileY - dbg_tileY) < 1);
-//								int px0 = (psize/2) *(tileX0 - 1 + 2 * tileX); // absolute in the original/result image 
-//								int py0 = (psize/2) *(tileY0 - 1 + 2 * tileY);
 								int px0 = (psize/2) * tileX; // absolute in the original/result image 
 								int py0 = (psize/2) * tileY;
 								int x0 = Math.max(0, -px0);
 								int y0 = Math.max(0, -py0);
 								int x1 = Math.min(psize, width- px0);
 								int y1 = Math.min(psize, height-py0);
+								boolean dbg_tile = (Math.abs((px0 + psize/2) - dbg_x) < psize/4) && (Math.abs((py0 + psize/2) - dbg_y) < psize/4);
 								if (dbg_tile) {
 									System.out.println("correlateWithPattern(): tileX="+tileX+", tileY="+tileY);
 									System.out.println("correlateWithPattern(): px0="+px0+", py0="+py0);
@@ -2929,14 +2930,22 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 											"input_corr_tx"+tileX+"_ty"+tileY,
 											rslt_titles);
 								}
-								// now cross-correlate with fat zero dtile and
-								// important to assign: dtile is modified, but not to the result!
-								dtile = doubleFHT.phaseCorrelatePattern ( // new
-							    		 dtile,      // double [] first,
-							    		 patternFD,  // double [] secondFD,
-							    		 phaseCoeff, // double    phaseCoeff,
-							    		 filter,     // double [] filter,       //  high/low pass filtering
-							    		 null);      // double [] first_save )  //null-OK
+								if (convolve) {   // convolve, not correlate
+									dtile = doubleFHT.convolvePattern (
+											dtile,      // double [] first,
+											patternFD,  // double [] secondFD,
+											filter,     // double [] filter,       //  high/low pass filtering
+											null);      // double [] first_save )  //null-OK
+								} else {
+									// now cross-correlate with fat zero dtile and
+									// important to assign: dtile is modified, but not to the result!
+									dtile = doubleFHT.phaseCorrelatePattern ( // new
+											dtile,      // double [] first,
+											patternFD,  // double [] secondFD,
+											phaseCoeff, // double    phaseCoeff,
+											filter,     // double [] filter,       //  high/low pass filtering
+											null);      // double [] first_save )  //null-OK
+								}								
 								if (dbg_tile) {
 									String [] rslt_titles= {"corr","pattern"};
 									ShowDoubleFloatArrays.showArrays(
@@ -2965,12 +2974,13 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 		return dout;
 	}
 	
-	public static void testPhaseCorr(
+	public static double [] testPhaseCorr(
 			double [] data_in,
 			double [] pattern_in,
+			boolean   convolve,   // convolve, not correlate
 			double [] wnd_in,
 			double    phaseCoeff) {
-		phaseCoeff = 0.5;
+//		phaseCoeff = 0.5;
 		double [] data = data_in.clone();
 		double [] pattern = pattern_in.clone();
 		double [] wnd = wnd_in.clone();
@@ -2987,7 +2997,7 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 					size,
 					size,
 					true,
-					"input_corr",
+					convolve?"input_conv":"input_corr",
 					rslt_titles);
 		}
 		DoubleFHT doubleFHT = new DoubleFHT();
@@ -2998,20 +3008,35 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 		if (use_new) {
 			final double [] patternFD = pattern.clone();
 			doubleFHT.transformPattern(patternFD);
-			corr_out = doubleFHT.phaseCorrelatePattern ( // new
+			if (convolve) {
+				corr_out = doubleFHT.convolvePattern (
+						data,      // double [] first,
+						patternFD,  // double [] secondFD,
+						null,     // double [] filter,       //  high/low pass filtering
+						null);      // double [] first_save )  //null-OK
+			} else {
+				corr_out = doubleFHT.phaseCorrelatePattern ( // new
 					data,        // double [] first,
 					patternFD,  // double [] secondFD,
 					phaseCoeff, // double    phaseCoeff,
 					null,       // double [] filter,       //  high/low pass filtering
 					null);      // double [] first_save )  //null-OK
+			}
 		} else {
-			corr_out = doubleFHT. phaseCorrelate ( // new
+			if (convolve) {
+				corr_out = doubleFHT. convolve ( // new
+						data, // double [] first,
+						pattern, // double [] second,
+						null);// double [] filter,     //  high/low pass filtering
+			} else {
+				corr_out = doubleFHT. phaseCorrelate ( // new
 					data, // double [] first,
 					pattern, // double [] second,
 					phaseCoeff, // double    phaseCoeff,
 					null, // double [] filter,     //  high/low pass filtering
 					null, // double [] first_save,
-					null); // double [] second_save )  //null-OK			
+					null); // double [] second_save )  //null-OK
+			}
 		}
 		
 		{
@@ -3021,10 +3046,11 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 					size,
 					size,
 					true,
-					"output_corr"+phaseCoeff,
+					convolve?"output_conv":("output_corr"+phaseCoeff),
 					rslt_titles);
 		}
 		System.out.println("testPhaseCorr() done");
+		return corr_out;
 	}
 	
 	public static void fillNaNs(
@@ -3115,12 +3141,19 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 		int       corr_size = 256;
 		double    phaseCoeff = 0.5;
 		int       debugLevel = 1;
+		double    min_corr  = 0.0025; // real max >0.005 with scale -500000;
+		double    adv_radius = 60.0; // pixels
+		int       corr_radius = 30; // may use same as adv_radius; but not more
 		
 		GenericJTabbedDialog gd = new GenericJTabbedDialog("Correlate image with pattern",1200,500);
 		gd.addStringField ("Pattern directory",  pattern_dir, 180, 	"Absolute path including trailing \"/\".");
 		gd.addStringField ("Pattern filename",   pattern_file,180, 	"Pattern filename.");
 		gd.addNumericField("Zoom-out factor",    zoomout,  0,4,"x", "Reduce pattern resolution to match image.");
 		gd.addNumericField("Phase correlation coefficient",  phaseCoeff,  3,7,"","1.0 - pure phase correlation, 0.0 - regular correlation.");
+		gd.addNumericField("Minimal correlation",  min_corr,  3,7,"","Minimal correlation value to keep.");
+		gd.addNumericField("Adversarial distance",  adv_radius,  1,6,"pix", "Suppress weaker if they have closer strong ones.");
+		gd.addNumericField("Correlation peak max radius", corr_radius,  0,4,"pix", "Limit correlation peak radius. Should be <= adversarial");
+		gd.addNumericField("Correlation size",   corr_size,  0,4,"pix", "Should be power of 2.");
 		gd.addNumericField("Debug level",        debugLevel,  0,4,"", "Debug level.");
 		gd.showDialog();
 		if (gd.wasCanceled()) return;
@@ -3128,6 +3161,10 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 		pattern_file=       gd.getNextString();
 		zoomout=      (int) gd.getNextNumber();
 		phaseCoeff=         gd.getNextNumber();
+		min_corr=           gd.getNextNumber();
+		adv_radius=         gd.getNextNumber();
+		corr_radius=  (int) gd.getNextNumber();
+		corr_size=    (int) gd.getNextNumber();
 		debugLevel=   (int) gd.getNextNumber();
 		
 		float [] fpixels = (float[]) imp_src.getProcessor().getPixels();
@@ -3160,44 +3197,103 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 				patterns[n][i] = fpixels_pattern[i];
 			}
 		}
-		/*
-		
-		float [] fpixels_pattern = (float[]) imp_pattern.getProcessor().getPixels();
-		double [ ] pattern = new double[fpixels_pattern.length];
-		for (int i = 0; i < fpixels_pattern.length; i++) {
-			pattern[i] = fpixels_pattern[i];
-		}
-		*/
-		double [][] corrs_out = new double[patterns.length][]; 
+
+		double [][] corrs_out =     new double[patterns.length][]; 
+		double [][] convolve_out =  new double[patterns.length][]; 
+		double [][] lim_corr =      new double[patterns.length][];
+		double [][] corr_patterns = new double[patterns.length][];
 		for (int n = 0; n < patterns.length; n++) {
-			double [] corr_pattern = patternZoomCropPad(
+			corr_patterns[n] = patternZoomCropPad(
 					patterns[n],      // double [] pattern,
 					pattern_size, // int       pattern_size,
 					corr_size,    // int       size,
 					zoomout,      // int       zoomout,
-					true);        // out_normalize); // boolean   normalize) 
+					false); // true);        // out_normalize); // boolean   normalize) 
 			if (kernel != null) {
-				corr_pattern = convolveWithKernel(
-						corr_pattern,      // final double [] data,
-						kernel,       // final double [] kernel,
-						corr_size); // final int width)
+				corr_patterns[n] = convolveWithKernel(
+						corr_patterns[n], // final double [] data,
+						kernel,           // final double [] kernel,
+						corr_size);       // final int width)
 			}
 			corrs_out[n]= correlateWithPattern(
-					data,         // final double [] data,
-					width,        // final int       width,
-					corr_size,    // final int       psize,      // power of 2, such as 64
-					corr_pattern, //final double [] pattern,    // [psize*psize]
-					phaseCoeff,   // final double    phaseCoeff,
-					debugLevel);  // final int       debugLevel) {
+					data,             // final double [] data,
+					width,            // final int       width,
+					corr_size,        // final int       psize,      // power of 2, such as 64
+					corr_patterns[n], //final double [] pattern,    // [psize*psize]
+					false,            // 			final boolean   convolve,   // convolve, not correlate
+					phaseCoeff,       // final double    phaseCoeff,
+					debugLevel);      // final int       debugLevel) {
+		}
+		ShowDoubleFloatArrays.showArrays(
+				corrs_out,
+				width,
+				height,
+				true,
+				removeKnownExtension(imp_src.getTitle())+"-PATTERN_CORR-0");
 
+		
+		
+//data
+		double []   bestcorr = new double [data.length];
+		int []      bestpatt = new int [bestcorr.length];
+		ArrayList<Point> object_list =  combineDirCorrs (
+				corrs_out,    // final double [][] corrs,
+				width,        // final int         width,
+				bestcorr,     // final double []   bestcorr
+				bestpatt,     // final int []      bestpatt_in,
+				min_corr,     // final double      min_corr,
+				adv_radius,   // final double      adv_radius,
+				corr_radius); // final int         corr_radius)
+		System.out.println("testPatternCorrelate(): Found "+object_list.size()+" candidates");
+		ShowDoubleFloatArrays.showArrays(
+				bestcorr,
+				width,
+				height,
+				removeKnownExtension(imp_src.getTitle())+"-BEST_CORR");
+		double [][] filtered_corrs = splitPattenCorrelations(
+				patterns.length, // final int         num_patterns,
+				bestcorr,        // final double []   bestcorr,
+				bestpatt);       // final int []      bestpatt)		
+		
+		/*
+		for (int n = 0; n < patterns.length; n++) {
+			lim_corr[n] = corrs_out[n].clone();
+			for (int i = 0; i < lim_corr.length; i++) {
+				if (lim_corr[n][i] < min_corr) {
+					lim_corr[n][i] = 0;
+				}
+			}
 		}
-		String [] rslt_titles =new String [patterns.length+1]; 
-		double [][] rslt = new double [patterns.length + 1][]; // ]{data, corr_out};
+		*/
+		for (int n = 0; n < patterns.length; n++) {
+			convolve_out[n]= correlateWithPattern(
+					filtered_corrs[n],// corrs_out[n], // final double [] data,
+					width,            // final int       width,
+					corr_size,        // final int       psize,      // power of 2, such as 64
+					corr_patterns[n], // final double [] pattern,    // [psize*psize]
+					true,             // final boolean   convolve,   // convolve, not correlate
+					phaseCoeff,       // final double    phaseCoeff,
+					debugLevel);      // final int       debugLevel) {
+		}
+		double [] convolved_merged = mergePattenConvolutions(
+				convolve_out); // final double [][] convs)
+		
+		
+		String [] rslt_titles =new String [patterns.length+2]; 
+		double [][] rslt = new double [patterns.length + 2][]; // ]{data, corr_out};
+		double [][] conv_rslt = new double [patterns.length + 2][]; // ]{data, corr_out};
 		rslt[0] = data;
+		conv_rslt[0] = data;
 		rslt_titles[0] = "original";
+
+		rslt[1] = bestcorr;
+		conv_rslt[1] = convolved_merged;
+		rslt_titles[1] = "combined";
+		
 		for (int i = 0; i < patterns.length; i++) {
-			rslt[i+1] = corrs_out[i];
-			rslt_titles[i+1] = "corr_"+pattern_labels[i];
+			rslt[i+2] = filtered_corrs[i];
+			conv_rslt[i+2] = convolve_out[i];
+			rslt_titles[i+2] = "corr_"+pattern_labels[i];
 		}
 		ShowDoubleFloatArrays.showArrays(
 				rslt,
@@ -3206,14 +3302,226 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 				true,
 				removeKnownExtension(imp_src.getTitle())+"-PATTERN_CORR",
 				rslt_titles);
+		ShowDoubleFloatArrays.showArrays(
+				conv_rslt,
+				width,
+				height,
+				true,
+				removeKnownExtension(imp_src.getTitle())+"-PATTERN_CORR_CONVOLVE_min_corr"+min_corr,
+				rslt_titles);
 		System.out.println("testPatternCorrelate(): correlation done");
 	}
 	
+	/**
+	 * Combine results of the phase correlations with different patters
+	 * (now with semi-obscured half-circles), using the best (highest value match),
+	 * filter by correlation value and suppress weeaker maximums by stronger neighbors
+	 * @param corrs  array of 2D correlation results [num_pattern][pixel]
+	 * @param width width of the correlation array
+	 * @param bestcorr_in null or double array  [corrs[0].length] will contain
+	 *        best correlation value from multiple patterns of corrs[][].
+	 * @param bestbatt_in null or integer array  [corrs[0].length] will contain
+	 *        number of the best pattern 
+	 * @param min_corr - minimal correlation value to use (lower - replace with 0)
+	 * @param adv_radius - suppress weaker local maximums near the stronger one 
+	 * @param corr_radius - maximal correlation peak radius (zero out outside).
+	 *                      Should be <= adv_radius to avoid thread races 
+	 * @return ArrayList of integer pairs - pixel index (x+y*width) and the pattern index
+	 */
+	public static ArrayList<Point> combineDirCorrs (
+			final double [][] corrs,
+			final int         width,
+			final double []   bestcorr_in,
+			final int []      bestpatt_in,
+			final double      min_corr,
+			final double      adv_radius,
+			final int         corr_radius) { 
+//		final int num_patt =       corrs.length;
+		final int height = corrs[0].length/width;
+		final double [] bestcorr = (bestcorr_in != null) ? bestcorr_in: (new double [corrs[0].length]);
+		final int []    bestpatt = (bestpatt_in != null) ? bestpatt_in: (new int    [corrs[0].length]);
+		// before adversarial filtering
+		final double [] bestcorr0  = new double [corrs[0].length];
+		final int []    bestpatt0 =  new int    [corrs[0].length];
+		Arrays.fill(bestpatt, -1);
+		Arrays.fill(bestpatt0, -1); // maybe not needed
+//		final boolean [] local_max = new boolean [bestcorr.length];
+		final Thread[] threads = ImageDtt.newThreadArray();
+		final AtomicInteger ai = new AtomicInteger(0);
+		final TileNeibs tn =  new TileNeibs(width, height);
+		// Combine patterns correlations
+		for (int ithread = 0; ithread < threads.length; ithread++) {
+			threads[ithread] = new Thread() {
+				public void run() {
+					for (int ipix = ai.getAndIncrement(); ipix < bestcorr0.length; ipix = ai.getAndIncrement()) {
+						for (int n = 0; n < corrs.length; n++) {
+							if (corrs[n][ipix] > bestcorr0[ipix]) {
+								bestcorr0[ipix] = corrs[n][ipix];
+								bestpatt0[ipix] = n;
+							}
+						}
+					}
+				}
+			};
+		}		      
+		ImageDtt.startAndJoin(threads);
+		// mark all local max
+		ai.set(0);
+		final AtomicInteger ati = new AtomicInteger(0);
+		ArrayList<ArrayList<Point>> lists = new ArrayList<ArrayList<Point>>();
+		for (int i = 0; i < threads.length; i++) {
+			lists.add(new ArrayList<Point>());
+		}
+		final int iradius = (int) Math.ceil(adv_radius);
+		final double adv_radius2 = adv_radius * adv_radius;
+		final double corr_radius2 = corr_radius*corr_radius;
+		for (int ithread = 0; ithread < threads.length; ithread++) {
+			threads[ithread] = new Thread() {
+				public void run() {
+					int thread_num = ati.getAndIncrement();
+					final TileNeibs tn =  new TileNeibs(width, height);
+					int corr_diameter = 2*corr_radius+1;
+					TileNeibs tnl =  new TileNeibs(corr_diameter,corr_diameter);
+					int local_center = (2 * corr_radius + 2) * corr_radius;
+					boolean [] mask = new boolean [corr_diameter*corr_diameter];
+
+					for (int ipix = ai.getAndIncrement(); ipix < bestcorr0.length; ipix = ai.getAndIncrement()) if (bestcorr0[ipix] >= min_corr) {
+						if (ipix == -792148) {
+							System.out.println("combineDirCorrs(): ipix="+ipix);
+						}
+						is_max: {
+							for (int dir = 0; dir > TileNeibs.DIRS; dir++) {
+								int ipix1 = tn.getNeibIndex(ipix, dir);
+								if ((ipix1 >= 0) && (bestcorr0[ipix1] > bestcorr0[ipix])){
+									break is_max;
+								}
+							}
+							// compare with others in adversarial radius, if equal - use higher index ipix
+							for (int dy = -iradius; dy <= iradius; dy++) {
+								for (int dx = -iradius; dx <= iradius; dx++) {
+									double r2 = dx*dx + dy*dy;
+									if ((r2 < adv_radius2) && (r2 > 2.1)) {
+										int ipix1 = tn.getNeibIndex(ipix, dx, dy);
+										if (ipix1 >= 0) {
+											if (bestcorr0[ipix1] > bestcorr0[ipix]) {
+												break is_max;
+											} else if ((bestcorr0[ipix1] == bestcorr0[ipix]) && (ipix1 < ipix)) {
+												break is_max;
+											}
+										}
+									}
+								}								
+							}
+							int patt = bestpatt0[ipix];
+							lists.get(thread_num).add(new Point(ipix,patt));
+							// Below should be no conflicts as no intersect
+							Arrays.fill(mask, false);
+							for (int dy = -corr_radius; dy <= corr_radius; dy++) {
+								for (int dx = -corr_radius; dx <= corr_radius; dx++) {
+									double r2 = dx*dx + dy*dy;
+									if (r2 < corr_radius2) {
+										int ipix1 = tn.getNeibIndex(ipix, dx, dy);
+										// TODO: mark mask with continuous pixels
+										if (ipix1 >= 0) {
+											int li =  tnl.getNeibIndex(local_center, dx, dy); // should be always
+											if (li < 0) {
+												System.out.println("combineDirCorrs(): BUG1 li<0");
+											} else {
+												mask[li] = corrs[patt][ipix1] >= min_corr; // only consider the same pattern
+											}
+										}										
+									}
+								}
+							}
+							int [] clusters = tnl.enumerateClusters(
+									mask, // boolean [] tiles,
+									null,   // int []     num_clusters,
+									false); // boolean ordered)
+							int center_cluster = clusters[local_center];
+							// Copy continuous pixels from the selected pattern
+							for (int dy = -corr_radius; dy <= corr_radius; dy++) {
+								for (int dx = -corr_radius; dx <= corr_radius; dx++) {
+									int li =  tnl.getNeibIndex(local_center, dx, dy); // should be always
+									if (li < 0) {
+										System.out.println("combineDirCorrs(): BUG2 li<0");
+									} else {
+										if (clusters[li] == center_cluster) {
+											int ipix1 = tn.getNeibIndex(ipix, dx, dy);
+											if (ipix1 >= 0) {
+												bestcorr[ipix1] = corrs[patt][ipix1];
+												bestpatt[ipix1] = patt;
+											}
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			};
+		}		      
+		ImageDtt.startAndJoin(threads);
+		// combine all lists
+		ArrayList<Point> list = new ArrayList<Point>();
+		for (int i = 0; i < lists.size(); i++) {
+			list.addAll(lists.get(i));
+		}
+		return list;
+	}
+	/**
+	 * Split correlation filter results into per-pattern ones before convolution.
+	 * Temporary solution as convolution is needed only for a few found maximums
+	 * @param num_patterns number of patters (should match bestpatt maximal value +1)
+	 * @param bestcorr best correlation values
+	 * @param bestpatt best pattern index matching bestcorr
+	 * @return [num_patterns][] arrays of per-pattern correlation results to be convolved
+	 *         with individual patterns
+	 */
+	public static double [][] splitPattenCorrelations(
+			final int         num_patterns,
+			final double []   bestcorr,
+			final int []      bestpatt){
+		final double [][] corrs = new double [num_patterns][bestcorr.length];
+		final Thread[] threads = ImageDtt.newThreadArray();
+		final AtomicInteger ai = new AtomicInteger(0);
+		for (int ithread = 0; ithread < threads.length; ithread++) {
+			threads[ithread] = new Thread() {
+				public void run() {
+					for (int ipix = ai.getAndIncrement(); ipix < bestcorr.length; ipix = ai.getAndIncrement()) if (bestcorr[ipix] > 0){
+						corrs[bestpatt[ipix]][ipix] = bestcorr[ipix];
+					}
+				}
+			};
+		}		      
+		ImageDtt.startAndJoin(threads);
+		return corrs;
+	}
+
+	public static double [] mergePattenConvolutions(
+			final double [][] convs){
+		final double [] combo_conv = new double [convs[0].length];
+		final Thread[] threads = ImageDtt.newThreadArray();
+		final AtomicInteger ai = new AtomicInteger(0);
+		for (int ithread = 0; ithread < threads.length; ithread++) {
+			threads[ithread] = new Thread() {
+				public void run() {
+					for (int ipix = ai.getAndIncrement(); ipix < combo_conv.length; ipix = ai.getAndIncrement()){
+						for (int n = 0; n < convs.length; n++) {
+							combo_conv[ipix] += convs[n][ipix];
+						}
+					}
+				}
+			};
+		}		      
+		ImageDtt.startAndJoin(threads);
+		return combo_conv;
+	}
+	
 	
 	public static void testPatternGenerate() {
 		int       half_size = 100;
 		boolean   half_pix = false; // center between pixels
-		double    radius =   32; // 32;
+		double    radius =   30; // 32; // 32;
 		double    edge=      15; //  4;
 		double    radius_in= 15; // if 0 - skip
 		double    edge_in =   8;
@@ -3318,7 +3626,7 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 		String [] pattern_titles = new String [patterns.length];
 		pattern_titles[0] = "full";
 		for (int n = 1; n < pattern_titles.length; n++) {
-			pattern_titles[n] = String.format("%f5.1 deg", 360.0*(n-1)/halves_number);
+			pattern_titles[n] = String.format("%5.1f deg", 360.0*(n-1)/halves_number);
 		}
 //		 public static ImagePlus makeArrays(double[][] pixels, int width, int height,  String title, String [] titles) {
 		
@@ -3382,7 +3690,7 @@ public class OrthoMap implements Comparable <OrthoMap>, Serializable{
 		}
 		if (normalize) {
 //			double scale = 1.0/sum_pix;
-			double scale = -10000.0/sum_pix; //TODO: calculate better
+			double scale = -500000.0/sum_pix; //TODO: calculate better
 			for (int i = 0; i < pout.length; i++) {
 				pout[i] *= scale;
 			}