X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=tools%2FclitkImageArithmGenericFilter.txx;h=4abb43343463652f899748d818f7d5bea3682d20;hb=1bc8f00b17a81decd50a5b01dc19623b486f51d6;hp=1316fc145c7caf0a524a9a77f3cf9255498f2c90;hpb=6d86b71b2f5fb9737cf57e55fa809219aa07d226;p=clitk.git

diff --git a/tools/clitkImageArithmGenericFilter.txx b/tools/clitkImageArithmGenericFilter.txx
index 1316fc1..4abb433 100644
--- a/tools/clitkImageArithmGenericFilter.txx
+++ b/tools/clitkImageArithmGenericFilter.txx
@@ -393,6 +393,18 @@ void clitk::ImageArithmGenericFilter<args_info_type>::ComputeImage(Iter1 it, Ite
       ++ito;
     }
     break;
+  case 13: // -ln I/I0
+    while (!it.IsAtEnd()) {
+      if (it.Get() == 0) { // special case for fluence image with 0 value in a pixel -> consider 0.5
+        ito.Set(-log(0.5 / mScalar) );
+      }
+      else {
+        ito.Set(-log(PixelTypeDownCast<double, PixelType>((double)it.Get() / mScalar)) );
+      }
+      ++it;
+      ++ito;
+    }
+    break;
   default: // error ?
     std::cerr << "ERROR : the operation number (" << mTypeOfOperation << ") is not known." << std::endl;
     exit(-1);