Corrected saving source of the photometric calibration

src/main/java/com/elphel/imagej/tileprocessor/OpticalFlow.java

@@ -4639,6 +4639,8 @@ public class OpticalFlow {
 				quadCLT_main.setLwirOffsets(quadCLTs[ref_index].getLwirOffsets());
 				quadCLT_main.setLwirScales (quadCLTs[ref_index].getLwirScales ());
 				quadCLT_main.setLwirScales2(quadCLTs[ref_index].getLwirScales2());
+				quadCLT_main.setPhotometricScene(quadCLTs[ref_index].getPhotometricScene());
+				
 				// Re-read reference and other scenes using new offsets	
 				quadCLTs[ref_index].saveQuadClt(); // to re-load new set of Bayer images to the GPU (do nothing for CPU) and Geometry
 				quadCLTs[ref_index] = (QuadCLT) quadCLT_main.spawnQuadCLT( // restores dsi from "DSI-MAIN"

src/main/java/com/elphel/imagej/tileprocessor/QuadCLT.java

@@ -2443,8 +2443,10 @@ public class QuadCLT extends QuadCLTCPU {
 			ref_scene.setLwirOffsets (offsets_new);
 			ref_scene.setLwirScales  (scales_new);
 			ref_scene.setLwirScales2 (scales2_new);
+			ref_scene.setPhotometricScene(); // use ref_scene name
 			return true;
 	}
+	
 	public static boolean calibratePhotometric2( // quadratic
 			CLTParameters     clt_parameters,
 			final QuadCLT     ref_scene, // now - may be null - for testing if scene is rotated ref
@@ -2653,6 +2655,7 @@ public class QuadCLT extends QuadCLTCPU {
 			ref_scene.setLwirOffsets (offs_new);
 			ref_scene.setLwirScales  (scales_new);
 			ref_scene.setLwirScales2 (scales2_new);
+			ref_scene.setPhotometricScene(); // use ref_scene name
 			return true;
 	}
 	

src/main/java/com/elphel/imagej/tileprocessor/QuadCLTCPU.java

@@ -1810,20 +1810,27 @@ public class QuadCLTCPU {
     	} else {
     		lwir_offset = Double.NaN;
     	}
-    	this.photometric_scene = getImageName();
+//    	this.photometric_scene = getImageName();
     }
 
     public String getPhotometricScene() {
     	return this.photometric_scene;
     }
-    
+    public void setPhotometricScene(String scene_name) {
+    	this.photometric_scene = scene_name;
+    }
+
+    public void setPhotometricScene() {
+    	setPhotometricScene(getImageName());
+    }
+
     public void setLwirScales(double [] scales) {
     	lwir_scales = scales; // will need to update properties!
-    	this.photometric_scene = getImageName();
+//    	this.photometric_scene = getImageName();
     }
     public void setLwirScales2(double [] scales2) {
     	lwir_scales2 = scales2; // will need to update properties!
-    	this.photometric_scene = getImageName();
+//    	this.photometric_scene = getImageName();
     }
 
     public double [] getColdHot() { // USED in lwir