Changeset 19847 for trunk/psModules/src/objects/pmMoments.h

Timestamp:

Oct 2, 2008, 10:50:41 AM (18 years ago)

Author:

eugene

Message:

clarify values of Sx, Sy, Sxy

File:

• trunk/psModules/src/objects/pmMoments.h (modified) (2 diffs)

trunk/psModules/src/objects/pmMoments.h

@@ -4 +4 @@
  * @author GLG, MHPCC
  *
- * @version $Revision: 1.3 $ $Name: not supported by cvs2svn $
- * @date $Date: 2007-01-24 02:54:15 $
+ * @version $Revision: 1.4 $ $Name: not supported by cvs2svn $
+ * @date $Date: 2008-10-02 20:50:41 $
  * Copyright 2004 Maui High Performance Computing Center, University of Hawaii
  */
@@ -26 +26 @@
     float x;     ///< X-coord of centroid.
     float y;     ///< Y-coord of centroid.
-    float Sx;    ///< x-second moment.
-    float Sy;    ///< y-second moment.
-    float Sxy;   ///< xy cross moment.
+    float Sx;    ///< x-second moment = sigma_x^2 = = (FWHM_x/2.355)^2
+    float Sy;    ///< y-second moment = sigma_y^2 = = (FWHM_y/2.355)^2
+    float Sxy;   ///< xy cross moment = sigma_xy
     float Sum;   ///< Pixel sum above sky (background).
     float Peak;  ///< Peak counts above sky.