regularization to alpha

src/main/java/com/elphel/imagej/vegetation/VegetationModel.java

@@ -636,7 +636,7 @@ public class VegetationModel {
 	double []          terrain_average,    // full image average terrain (no nulls)
 	double []          vegetation_average, // full image average vegetation (with nulls)
 	double [][]        terrain_rendered,   // terrain rendered for scenes (has nulls)
-	double [][][]      vegetation_offsets,  // [num_scenes][pixel]{dx,dy} differential offsets of vegetation to terrain grid
+	double [][][]      vegetation_offsets, // [num_scenes][pixel]{dx,dy} differential offsets of vegetation to terrain grid
 	String []          titles,
 	int                debugLevel) {
 		boolean diff_mode = true;
@@ -698,11 +698,18 @@ public class VegetationModel {
 		int       min_scenes =  10;
 		double    default_alpha = 0.8;
 		double [] scene_weights = null;
+		double    reg_weights =   0.25;        // fraction of the total weight used for regularization
+		double    alpha_loss =    1.0;         // quadratic loss when alpha reaches -1.0 or 2.0 
+		double    alpha_offset =  0.0;         // if >0,  start losses above 0.0 and below 1.0;
+		
 		int       num_samples = vegetationLMA.prepareLMA(
 				woi50,         // final Rectangle   woi,
 				min_scenes,    // final int         min_scenes, // minimal number of scenes (inside woi) vegetation pixel must influence
 				default_alpha, // final double      default_alpha,
 				scene_weights, // final double []   scene_weights, // null or per-scene weights (higher for larger offsets)?
+				reg_weights,   // final double             reg_weights,        // fraction of the total weight used for regularization
+				alpha_loss,    // final double             alpha_loss,         // quadratic loss when alpha reaches -1.0 or 2.0 
+				alpha_offset,  // final double             alpha_offset,         // quadratic loss when alpha reaches -1.0 or 2.0 
 				debugLevel);   // final int         debugLevel);
 		
 		double  lambda =            0.1;
@@ -712,6 +719,9 @@ public class VegetationModel {
 		boolean last_run =       false;
 		double  rms_diff =          0.0001;
 		int     num_iter = 100;
+		vegetationLMA.debug_index = 0;
+		vegetationLMA.debug_image = new double [num_iter][];
+		
 		int lma_rslt= vegetationLMA.runLma( // <0 - failed, >=0 iteration number (1 - immediately)
 				lambda,           // double lambda,           // 0.1
 				lambda_scale_good,// double lambda_scale_good,// 0.5