r182: *** empty log message ***

[ctsim.git] / libctsim / imagefile.cpp

diff --git a/libctsim/imagefile.cpp b/libctsim/imagefile.cpp
index 1b1660dc0375653a4665d990612a11fc89e76140..3f7c0beff717a84bafe3f588816dfc50d29bf0db 100644 (file)
--- a/libctsim/imagefile.cpp
+++ b/libctsim/imagefile.cpp
@@ -9,7 +9,7 @@
 **  This is part of the CTSim program
 **  Copyright (C) 1983-2000 Kevin Rosenberg
 **
-**  $Id: imagefile.cpp,v 1.9 2000/07/15 08:36:13 kevin Exp $
+**  $Id: imagefile.cpp,v 1.10 2000/08/22 16:49:56 kevin Exp $
 **
 **  This program is free software; you can redistribute it and/or modify
 **  it under the terms of the GNU General Public License (version 2) as
@@ -219,7 +219,7 @@ ImageFile::statistics (double& min, double& max, double& mean, double& mode, dou
     }
     mean /= (nx * ny);
 
-    static const int nbin = 256;
+    static const int nbin = 1024;
     int hist[ nbin ] = {0};
     double spread = max - min;
     mode = 0;
@@ -244,8 +244,22 @@ ImageFile::statistics (double& min, double& max, double& mean, double& mode, dou
     }
 
     mode = (max_binindex * spread / (nbin - 1)) + min;
-      
-    median = 0.;
+
+    int nPixels = nx * ny;
+    slist<double> vecImage;
+    for (int ix = 0; ix < nx; ix++)
+      for (int iy = 0; iy < ny; iy++)
+       vecImage.push_front (v[ix][iy]);
+    vecImage.sort();
+    slist<double>::const_iterator iter = vecImage.begin();
+    for (int i = 0; i < (nPixels / 2) - 1; i++)
+      iter++; // Advance iterator to (nPixels / 2) - 1;
+
+    if (nPixels % 2) {  // Odd
+      iter++;
+      median = *iter;
+    } else                // Even
+      median = (*iter++ + *iter) / 2;
 }