diff options
Diffstat (limited to 'src/armnn/backends/RefWorkloads/ResizeBilinear.cpp')
-rw-r--r-- | src/armnn/backends/RefWorkloads/ResizeBilinear.cpp | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/src/armnn/backends/RefWorkloads/ResizeBilinear.cpp b/src/armnn/backends/RefWorkloads/ResizeBilinear.cpp deleted file mode 100644 index 0bce3c7ed8..0000000000 --- a/src/armnn/backends/RefWorkloads/ResizeBilinear.cpp +++ /dev/null @@ -1,92 +0,0 @@ -// -// Copyright © 2017 Arm Ltd. All rights reserved. -// SPDX-License-Identifier: MIT -// - -#include "ResizeBilinear.hpp" - -#include "TensorBufferArrayView.hpp" - -#include <boost/numeric/conversion/cast.hpp> - -#include <cmath> -#include <algorithm> - -namespace armnn -{ - -namespace -{ - -inline float Lerp(float a, float b, float w) -{ - return w * b + (1.f - w) * a; -} - -} - -void ResizeBilinear(const float* in, const TensorInfo& inputInfo, float* out, const TensorInfo& outputInfo) -{ - // 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 - // will yield different results than if projecting the centre of output texels. - - const unsigned int batchSize = inputInfo.GetShape()[0]; - const unsigned int channelCount = inputInfo.GetShape()[1]; - - const unsigned int inputHeight = inputInfo.GetShape()[2]; - const unsigned int inputWidth = inputInfo.GetShape()[3]; - const unsigned int outputHeight = outputInfo.GetShape()[2]; - const unsigned int outputWidth = outputInfo.GetShape()[3]; - - // 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); - - TensorBufferArrayView<const float> input(inputInfo.GetShape(), in); - TensorBufferArrayView<float> output(outputInfo.GetShape(), out); - - for (unsigned int n = 0; n < batchSize; ++n) - { - for (unsigned int c = 0; c < channelCount; ++c) - { - for (unsigned int y = 0; y < outputHeight; ++y) - { - // Corresponding real-valued height coordinate in input image. - const float iy = boost::numeric_cast<float>(y) * scaleY; - - // Discrete height coordinate of top-left texel (in the 2x2 texel area used for interpolation). - const float fiy = floorf(iy); - const unsigned int y0 = boost::numeric_cast<unsigned int>(fiy); - - // Interpolation weight (range [0,1]). - const float yw = iy - fiy; - - for (unsigned int x = 0; x < outputWidth; ++x) - { - // Real-valued and discrete width coordinates in input image. - const float ix = boost::numeric_cast<float>(x) * scaleX; - const float fix = floorf(ix); - const unsigned int x0 = boost::numeric_cast<unsigned int>(fix); - - // Interpolation weight (range [0,1]). - const float xw = ix - fix; - - // Discrete width/height coordinates of texels below and to the right of (x0, y0). - const unsigned int x1 = std::min(x0 + 1, inputWidth - 1u); - const unsigned int y1 = std::min(y0 + 1, inputHeight - 1u); - - // Interpolation - const float ly0 = Lerp(input.Get(n, c, y0, x0), input.Get(n, c, y0, x1), xw); // lerp along row y0. - const float ly1 = Lerp(input.Get(n, c, y1, x0), input.Get(n, c, y1, x1), xw); // lerp along row y1. - const float l = Lerp(ly0, ly1, yw); - - output.Get(n, c, y, x) = l; - } - } - } - } -} - -} //namespace armnn |