NumCpp  2.11.0
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::filter
38 {
39  //============================================================================
40  // Method Description:
53  template<typename dtype>
55  uint32 inSize,
56  uint8 inRank,
57  Boundary inBoundaryType = Boundary::REFLECT,
58  dtype inConstantValue = 0)
59  {
60  NdArray<dtype> arrayWithBoundary =
61  boundary::addBoundary1d(inImageArray, inBoundaryType, inSize, inConstantValue);
62  NdArray<dtype> output(1, inImageArray.size());
63 
64  const uint32 boundarySize = inSize / 2; // integer division
65  const uint32 endPoint = boundarySize + inImageArray.size();
66 
67  for (uint32 i = boundarySize; i < endPoint; ++i)
68  {
69  NdArray<dtype> window = arrayWithBoundary[Slice(i - boundarySize, i + boundarySize + 1)];
70 
71  output[i - boundarySize] = sort(window)[inRank];
72  }
73 
74  return output;
75  }
76 } // namespace nc::filter
Holds 1D and 2D arrays, the main work horse of the NumCpp library.
Definition: NdArrayCore.hpp:138
size_type size() const noexcept
Definition: NdArrayCore.hpp:4477
A Class for slicing into NdArrays.
Definition: Slice.hpp:45
NdArray< dtype > addBoundary1d(const NdArray< dtype > &inImage, Boundary inBoundaryType, uint32 inKernalSize, dtype inConstantValue=0)
Definition: addBoundary1d.hpp:56
Definition: addBoundary1d.hpp:44
NdArray< dtype > rankFilter1d(const NdArray< dtype > &inImageArray, uint32 inSize, uint8 inRank, Boundary inBoundaryType=Boundary::REFLECT, dtype inConstantValue=0)
Definition: rankFilter1d.hpp:54
Boundary
Boundary condition to apply to the image filter.
Definition: Boundary.hpp:36
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