ENH : inversve gain coef for QB

Code/IO/otbImageMetadataInterface.cxx

@@ -911,11 +911,11 @@ ImageMetadataInterface::GetQuickbirdPhysicalGain( const MetaDataDictionaryType &
   gain.SetSize(5);
   if (isPost20030606)
   {
-    gain[0] = 0.16200;//Pan
-    gain[1] = 0.23590;//Blue
-    gain[2] = 0.14530;//Green
-    gain[3] = 0.17850;//Red
-    gain[4] = 0.13530;//NIR
+    gain[0] = 1. / 0.16200;//Pan
+    gain[1] = 1. / 0.23590;//Blue
+    gain[2] = 1. / 0.14530;//Green
+    gain[3] = 1. / 0.17850;//Red
+    gain[4] = 1. / 0.13530;//NIR
   }
   else
   {