From faa1558ccc34e9920954bf20af9d2e29a6f59df3 Mon Sep 17 00:00:00 2001
From: "Richard A. Kirian" <rkirian@asu.edu>
Date: Tue, 1 Nov 2011 14:35:43 -0700
Subject: Better sanity check (Miller indices should be ~integers)

---
 src/index.c |  12 +++----
 src/peaks.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++++------------
 src/peaks.h |   2 +-
 3 files changed, 89 insertions(+), 29 deletions(-)

diff --git a/src/index.c b/src/index.c
index ced8bbb8..d5e76c50 100644
--- a/src/index.c
+++ b/src/index.c
@@ -205,17 +205,15 @@ void index_pattern(struct image *image, UnitCell *cell, IndexingMethod *indm,
 			if ( new_cell == NULL ) continue;
 
 			/* Sanity check */
-			image->reflections = find_intersections(image,
-			                                        new_cell);
-			if ( !config_insane &&
-			     !peak_sanity_check(image->reflections,
-			                        image->features) )
-			{
+			image->reflections = find_intersections(image, new_cell);
+			image->indexed_cell = new_cell;
+			
+			if ( !config_insane && !peak_sanity_check(image) ) {
 				cell_free(new_cell);
+				image->indexed_cell = NULL;
 				continue;
 			}
 
-			image->indexed_cell = new_cell;
 			goto done;  /* Success */
 
 		}
diff --git a/src/peaks.c b/src/peaks.c
index 92556ea6..a5e1983a 100644
--- a/src/peaks.c
+++ b/src/peaks.c
@@ -462,46 +462,108 @@ void search_peaks(struct image *image, float threshold, float min_gradient,
 }
 
 
-int peak_sanity_check(RefList *rlist, ImageFeatureList *flist)
+int peak_sanity_check(struct image *image)
 {
+	
 	int i;
 	int n_feat = 0;
 	int n_sane = 0;
+	double ax, ay, az;
+	double bx, by, bz;
+	double cx, cy, cz;	
+	double min_dist = 0.25;
+
+	/* Round towards nearest */
+	fesetround(1);
+
+	/* Cell basis vectors for this image */
+	cell_get_cartesian(image->indexed_cell, &ax, &ay, &az, 
+	                                        &bx, &by, &bz,
+	                                        &cx, &cy, &cz);
+	
+	/* Loop over peaks, checking proximity to nearest reflection */
+	for ( i=0; i<image_feature_count(image->features); i++ ) {
 
-	for ( i=0; i<image_feature_count(flist); i++ ) {
-
-		double dist;
 		struct imagefeature *f;
-		Reflection *refl;
-		RefListIterator *iter;
+		struct rvec q;
+		double h,k,l,hd,kd,ld;
 
-		f = image_get_feature(flist, i);
+		/* Assume all image "features" are genuine peaks */
+		f = image_get_feature(image->features, i);
 		if ( f == NULL ) continue;
 		n_feat++;
 
-		/* Find closest predicted peak */
-
-		for ( refl = first_refl(rlist, &iter);
-		      refl != NULL;
-		      refl = next_refl(refl, iter) )
-		{
-			double fs, ss;
-			get_detector_pos(refl, &fs, &ss);
-			dist = sqrt(pow(fs-f->fs, 2.0) + pow(ss-f->ss, 2.0));
-			if ( dist < PEAK_CLOSE ) {
-				n_sane++;
-				continue;
-			}
+		/* Reciprocal space position of found peak */
+		q = get_q(image, f->fs, f->ss, NULL, 1.0/image->lambda);
+
+		/* Decimal and fractional Miller indices of nearest Bragg reflection */
+		hd = q.u * ax + q.v * ay + q.w * az;
+		kd = q.u * bx + q.v * by + q.w * bz;
+		ld = q.u * cx + q.v * cy + q.w * cz;
+		h = lrint(hd);
+		k = lrint(kd);
+		l = lrint(ld);
+
+		/* Check distance */
+		if ( fabs(h - hd) < min_dist && 
+			  fabs(k - kd) < min_dist &&
+			  fabs(l - ld) < min_dist ) {
+			// printf("%6.1f %6.1f %3g %3g %3g %6.2f %6.2f %6.2f\n",f->fs,f->ss,h,k,l,hd,kd,ld);
+			n_sane++;
+			continue;
 		}
 
 	}
 
-	if ( (float)n_sane / (float)n_feat < 0.1 ) return 0;
+	/* return 0 means fail test, return 1 means pass test */
+	// printf("%d out of %d peaks are \"sane\"\n",n_sane,n_feat);
+	if ( (float)n_sane / (float)n_feat < 0.5 ) return 0;
 
 	return 1;
 }
 
 
+
+//int peak_sanity_check(RefList *rlist, ImageFeatureList *flist)
+//{
+//	int i;
+//	int n_feat = 0;
+//	int n_sane = 0;
+//
+//	for ( i=0; i<image_feature_count(flist); i++ ) {
+//
+//		double dist;
+//		struct imagefeature *f;
+//		Reflection *refl;
+//		RefListIterator *iter;
+//
+//		f = image_get_feature(flist, i);
+//		if ( f == NULL ) continue;
+//		n_feat++;
+//
+//		/* Find closest predicted peak */
+//
+//		for ( refl = first_refl(rlist, &iter);
+//		      refl != NULL;
+//		      refl = next_refl(refl, iter) )
+//		{
+//			double fs, ss;
+//			get_detector_pos(refl, &fs, &ss);
+//			dist = sqrt(pow(fs-f->fs, 2.0) + pow(ss-f->ss, 2.0));
+//			if ( dist < PEAK_CLOSE ) {
+//				n_sane++;
+//				continue;
+//			}
+//		}
+//
+//	}
+//
+//	if ( (float)n_sane / (float)n_feat < 0.1 ) return 0;
+//
+//	return 1;
+//}
+
+
 /* Integrate the list of predicted reflections in "image" */
 void integrate_reflections(struct image *image, int polar, int use_closer,
                            int bgsub)
diff --git a/src/peaks.h b/src/peaks.h
index 7b66b9ac..9d475ea9 100644
--- a/src/peaks.h
+++ b/src/peaks.h
@@ -27,7 +27,7 @@ extern void search_peaks(struct image *image, float threshold,
 extern void integrate_reflections(struct image *image,
                                   int polar, int use_closer, int bgsub);
 
-extern int peak_sanity_check(RefList *rlist, ImageFeatureList *flist);
+extern int peak_sanity_check(struct image * image);
 
 /* Exported so it can be poked by integration_check */
 extern int integrate_peak(struct image *image, int cfs, int css,
-- 
cgit v1.2.3