NumCpp  2.7.0
A Templatized Header Only C++ Implementation of the Python NumPy Library
medianFilter1d.hpp
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1 #pragma once
29 
30 #include "NumCpp/Core/Slice.hpp"
31 #include "NumCpp/Core/Types.hpp"
34 #include "NumCpp/NdArray.hpp"
35 
36 namespace nc
37 {
38  namespace filter
39  {
40  //============================================================================
41  // Method Description:
52  template<typename dtype>
53  NdArray<dtype> medianFilter1d(const NdArray<dtype>& inImageArray, uint32 inSize,
54  Boundary inBoundaryType = Boundary::REFLECT, dtype inConstantValue = 0)
55  {
56  NdArray<dtype> arrayWithBoundary = boundary::addBoundary1d(inImageArray, inBoundaryType, inSize, inConstantValue);
57  NdArray<dtype> output(1, inImageArray.size());
58 
59  const uint32 boundarySize = inSize / 2; // integer division
60  const uint32 endPoint = boundarySize + inImageArray.size();
61 
62  for (uint32 i = boundarySize; i < endPoint; ++i)
63  {
64  NdArray<dtype> window = arrayWithBoundary[Slice(i - boundarySize, i + boundarySize + 1)];
65 
66  output[i - boundarySize] = window.median().item();
67  }
68 
69  return output;
70  }
71  } // namespace filter
72 } // namespace nc
Holds 1D and 2D arrays, the main work horse of the NumCpp library.
Definition: NdArrayCore.hpp:72
size_type size() const noexcept
Definition: NdArrayCore.hpp:4296
NdArray< dtype > median(Axis inAxis=Axis::NONE) const
Definition: NdArrayCore.hpp:3062
A Class for slicing into NdArrays.
Definition: Slice.hpp:44
NdArray< dtype > addBoundary1d(const NdArray< dtype > &inImage, Boundary inBoundaryType, uint32 inKernalSize, dtype inConstantValue=0)
Definition: addBoundary1d.hpp:60
NdArray< dtype > medianFilter1d(const NdArray< dtype > &inImageArray, uint32 inSize, Boundary inBoundaryType=Boundary::REFLECT, dtype inConstantValue=0)
Definition: medianFilter1d.hpp:53
Boundary
Boundary condition to apply to the image filter.
Definition: Boundary.hpp:37
Definition: Coordinate.hpp:45
std::uint32_t uint32
Definition: Types.hpp:40