MLCE-139: add capability to align corners for bilinear resize

* Add parsing of the related parameter to TfLiteParser
* Update ResizeDescriptor to store the additional parameter
* Update NEON/CL workload to pass the additional parameter.
* Update Reference workload to pass and handle the additional parameter.

!ComputeLibrary:2538
!ComputeLibrary:2569
!armnn:2612

Signed-off-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Change-Id: Id149e1c24c2abed7e9dd81939acf54dfabfcdfd2

3 files changed, 17 insertions, 5 deletions

diff --git a/src/backends/reference/workloads/RefResizeWorkload.cpp b/src/backends/reference/workloads/RefResizeWorkload.cpp
index 26225f8823..624b426cbf 100644
--- a/src/backends/reference/workloads/RefResizeWorkload.cpp
+++ b/src/backends/reference/workloads/RefResizeWorkload.cpp
@@ -29,7 +29,13 @@ void RefResizeWorkload::Execute() const
     std::unique_ptr<Encoder<float>> encoderPtr = MakeEncoder<float>(outputInfo, m_Data.m_Outputs[0]->Map());
     Encoder<float> &encoder = *encoderPtr;
 
-    Resize(decoder, inputInfo, encoder, outputInfo, m_Data.m_Parameters.m_DataLayout, m_Data.m_Parameters.m_Method);
+    Resize(decoder,
+           inputInfo,
+           encoder,
+           outputInfo,
+           m_Data.m_Parameters.m_DataLayout,
+           m_Data.m_Parameters.m_Method,
+           m_Data.m_Parameters.m_BilinearAlignCorners);
 }
 
 } //namespace armnn
diff --git a/src/backends/reference/workloads/Resize.cpp b/src/backends/reference/workloads/Resize.cpp
index 3050bae870..a26e34a1ff 100644
--- a/src/backends/reference/workloads/Resize.cpp
+++ b/src/backends/reference/workloads/Resize.cpp
@@ -37,7 +37,8 @@ void Resize(Decoder<float>&   in,
             Encoder<float>&   out,
             const TensorInfo& outputInfo,
             DataLayoutIndexed dataLayout,
-            armnn::ResizeMethod resizeMethod)
+            armnn::ResizeMethod resizeMethod,
+            bool alignCorners)
 {
     // We follow the definition of TensorFlow and AndroidNN: the top-left corner of a texel in the output
     // image is projected into the input image to figure out the interpolants and weights. Note that this
@@ -51,10 +52,14 @@ void Resize(Decoder<float>&   in,
     const unsigned int outputHeight = outputInfo.GetShape()[dataLayout.GetHeightIndex()];
     const unsigned int outputWidth = outputInfo.GetShape()[dataLayout.GetWidthIndex()];
 
+    const unsigned int sizeOffset = resizeMethod == armnn::ResizeMethod::Bilinear && alignCorners ? 1 : 0;
+
     // How much to scale pixel coordinates in the output image, to get the corresponding pixel coordinates
     // in the input image.
-    const float scaleY = boost::numeric_cast<float>(inputHeight) / boost::numeric_cast<float>(outputHeight);
-    const float scaleX = boost::numeric_cast<float>(inputWidth) / boost::numeric_cast<float>(outputWidth);
+    const float scaleY = boost::numeric_cast<float>(inputHeight - sizeOffset)
+                       / boost::numeric_cast<float>(outputHeight - sizeOffset);
+    const float scaleX = boost::numeric_cast<float>(inputWidth - sizeOffset)
+                       / boost::numeric_cast<float>(outputWidth - sizeOffset);
 
     TensorShape inputShape =  inputInfo.GetShape();
     TensorShape outputShape =  outputInfo.GetShape();
diff --git a/src/backends/reference/workloads/Resize.hpp b/src/backends/reference/workloads/Resize.hpp
index 4c357946d9..cd8835fa08 100644
--- a/src/backends/reference/workloads/Resize.hpp
+++ b/src/backends/reference/workloads/Resize.hpp
@@ -19,6 +19,7 @@ void Resize(Decoder<float>&               in,
             Encoder<float>&               out,
             const TensorInfo&             outputInfo,
             armnnUtils::DataLayoutIndexed dataLayout = DataLayout::NCHW,
-            ResizeMethod                  resizeMethod = ResizeMethod::NearestNeighbor);
+            ResizeMethod                  resizeMethod = ResizeMethod::NearestNeighbor,
+            bool                          alignConers = false);
 
 } // namespace armnn