NumCpp  1.0
A C++ implementation of the Python Numpy library
percentileFilter1d.hpp
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1 #pragma once
30 
31 #include "NumCpp/Core/Slice.hpp"
32 #include "NumCpp/Core/Types.hpp"
36 #include "NumCpp/NdArray.hpp"
37 
38 namespace nc
39 {
40  namespace filter
41  {
42  //============================================================================
43  // Method Description:
56  template<typename dtype>
57  NdArray<dtype> percentileFilter1d(const NdArray<dtype>& inImageArray, uint32 inSize, double inPercentile,
58  Boundary inBoundaryType = Boundary::REFLECT, dtype inConstantValue = 0)
59  {
60  NdArray<dtype> arrayWithBoundary = boundary::addBoundary1d(inImageArray, inBoundaryType, inSize, inConstantValue);
61  NdArray<dtype> output(1, inImageArray.size());
62 
63  const uint32 boundarySize = inSize / 2; // integer division
64  const uint32 endPoint = boundarySize + inImageArray.size();
65 
66  for (uint32 i = boundarySize; i < endPoint; ++i)
67  {
68  NdArray<dtype> window = arrayWithBoundary[Slice(i - boundarySize, i + boundarySize + 1)];
69 
70  output[i - boundarySize] = percentile(window, inPercentile).item();
71  }
72 
73  return output;
74  }
75  }
76 }
nc::NdArray::item
value_type item() const
Definition: NdArrayCore.hpp:2950
nc::percentile
NdArray< dtype > percentile(const NdArray< dtype > &inArray, double inPercentile, Axis inAxis=Axis::NONE, const std::string &inInterpMethod="linear")
Definition: percentile.hpp:67
nc::filter::boundary::addBoundary1d
NdArray< dtype > addBoundary1d(const NdArray< dtype > &inImage, Boundary inBoundaryType, uint32 inKernalSize, dtype inConstantValue=0)
Definition: addBoundary1d.hpp:62
percentile.hpp
nc::NdArray< dtype >
nc::uint32
std::uint32_t uint32
Definition: Types.hpp:41
NdArray.hpp
Boundary.hpp
nc::NdArray::size
size_type size() const noexcept
Definition: NdArrayCore.hpp:4310
nc::filter::Boundary::REFLECT
@ REFLECT
nc
Definition: Coordinate.hpp:45
nc::filter::Boundary
Boundary
Boundary condition to apply to the image filter.
Definition: Boundary.hpp:38
addBoundary1d.hpp
Types.hpp
nc::filter::percentileFilter1d
NdArray< dtype > percentileFilter1d(const NdArray< dtype > &inImageArray, uint32 inSize, double inPercentile, Boundary inBoundaryType=Boundary::REFLECT, dtype inConstantValue=0)
Definition: percentileFilter1d.hpp:57
nc::Slice
A Class for slicing into NdArrays.
Definition: Slice.hpp:44
Slice.hpp