X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=tools%2FclitkImageArithmGenericFilter.txx;h=37fa000d3c3e402a1dac421696e070ed8f4f4e90;hb=182d324aaea3d92e8b676d8a6e609ba8fab44726;hp=4c2f0a58c6ef1f32cf858ddb5a02cfef31c0a722;hpb=2e890f7bcf7118cd1b49ff824fa8b5b6a6d9f044;p=clitk.git

diff --git a/tools/clitkImageArithmGenericFilter.txx b/tools/clitkImageArithmGenericFilter.txx
index 4c2f0a5..37fa000 100644
--- a/tools/clitkImageArithmGenericFilter.txx
+++ b/tools/clitkImageArithmGenericFilter.txx
@@ -391,6 +391,18 @@ 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(PixelTypeDownCast<double, PixelType>(-log((double)it.Get() / mScalar)) );
+      }
+      ++it;
+      ++ito;
+    }
+    break;
   default: // error ?
     std::cerr << "ERROR : the operation number (" << mTypeOfOperation << ") is not known." << std::endl;
     exit(-1);