Index: trunk/psModules/src/objects/pmPeaks.c
===================================================================
--- trunk/psModules/src/objects/pmPeaks.c	(revision 24623)
+++ trunk/psModules/src/objects/pmPeaks.c	(revision 25754)
@@ -60,7 +60,8 @@
     // if min point is too deviant, use the peak value
     // XXX need to calculate dx, dy correctly
+    // 0.5 PIX: peaks are calculated using the pixel index and converted here to pixel coords
     if ((fabs(min.x) < 1.5) && (fabs(min.y) < 1.5)) {
-        peak->xf = min.x + ix + image->col0;
-        peak->yf = min.y + iy + image->row0;
+        peak->xf = min.x + ix + image->col0 + 0.5;
+        peak->yf = min.y + iy + image->row0 + 0.5;
 
 	// These errors are fractional errors, and should be scaled by the 
@@ -73,6 +74,6 @@
 	peak->yf = PS_MAX (PS_MIN (peak->yf, image->numRows - 1), image->row0);
     } else {
-        peak->xf = ix;
-        peak->yf = iy;
+        peak->xf = ix + 0.5;
+        peak->yf = iy + 0.5; 
 	peak->dx = NAN;
 	peak->dy = NAN;