NumCpp  2.7.0
A Templatized Header Only C++ Implementation of the Python NumPy Library
rankFilter1d.hpp
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1 #pragma once
29 
30 #include "NumCpp/Core/Slice.hpp"
31 #include "NumCpp/Core/Types.hpp"
35 #include "NumCpp/NdArray.hpp"
36 
37 namespace nc
38 {
39  namespace filter
40  {
41  //============================================================================
42  // Method Description:
54  template<typename dtype>
55  NdArray<dtype> rankFilter1d(const NdArray<dtype>& inImageArray, uint32 inSize, uint8 inRank,
56  Boundary inBoundaryType = Boundary::REFLECT, dtype inConstantValue = 0)
57  {
58  NdArray<dtype> arrayWithBoundary = boundary::addBoundary1d(inImageArray, inBoundaryType, inSize, inConstantValue);
59  NdArray<dtype> output(1, inImageArray.size());
60 
61  const uint32 boundarySize = inSize / 2; // integer division
62  const uint32 endPoint = boundarySize + inImageArray.size();
63 
64  for (uint32 i = boundarySize; i < endPoint; ++i)
65  {
66  NdArray<dtype> window = arrayWithBoundary[Slice(i - boundarySize, i + boundarySize + 1)];
67 
68  output[i - boundarySize] = sort(window)[inRank];
69  }
70 
71  return output;
72  }
73  } // namespace filter
74 } // 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
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 > rankFilter1d(const NdArray< dtype > &inImageArray, uint32 inSize, uint8 inRank, Boundary inBoundaryType=Boundary::REFLECT, dtype inConstantValue=0)
Definition: rankFilter1d.hpp:55
Boundary
Boundary condition to apply to the image filter.
Definition: Boundary.hpp:37
Definition: Coordinate.hpp:45
NdArray< dtype > sort(const NdArray< dtype > &inArray, Axis inAxis=Axis::NONE)
Definition: sort.hpp:46
std::uint8_t uint8
Definition: Types.hpp:42
std::uint32_t uint32
Definition: Types.hpp:40