BUG: Mantis-942: pixel convention consistency for BasicFilters

Code/BasicFilters/otbSpatialObjectToImageDrawingFilter.txx

@@ -370,6 +370,8 @@ SpatialObjectToImageDrawingFilter<TInputSpatialObject, TOutputImage>
 
   if (originspecified)
     {
+    origine[0] += 0.5 * m_Spacing[0];
+    origine[1] += 0.5 * m_Spacing[1];
     OutputImage->SetOrigin(origine);     //   and origin
     m_Origin[0] = OutputImage->GetOrigin()[0];
     m_Origin[1] = OutputImage->GetOrigin()[1];

Code/BasicFilters/otbVectorDataToLabelImageFilter.txx

@@ -288,8 +288,8 @@ VectorDataToLabelImageFilter<TVectorData, TOutputImage>::GenerateData()
   OutputIndexType  bufferIndexOrigin = bufferedRegion.GetIndex();
   OutputOriginType bufferOrigin;
   this->GetOutput()->TransformIndexToPhysicalPoint(bufferIndexOrigin, bufferOrigin);
-  geoTransform[0] = bufferOrigin[0];
-  geoTransform[3] = bufferOrigin[1];
+  geoTransform[0] = bufferOrigin[0] - 0.5 * this->GetOutput()->GetSpacing()[0];
+  geoTransform[3] = bufferOrigin[1] - 0.5 * this->GetOutput()->GetSpacing()[1];
   geoTransform[1] = this->GetOutput()->GetSpacing()[0];
   geoTransform[5] = this->GetOutput()->GetSpacing()[1];