NumCpp  2.1.0
A C++ implementation of the Python Numpy library
maximumFilter1d.hpp
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1 #pragma once
30 
31 #include "NumCpp/Core/Slice.hpp"
32 #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> maximumFilter1d(const NdArray<dtype>& inImageArray, uint32 inSize,
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] = window.max().item();
69  }
70 
71  return output;
72  }
73  } // namespace filter
74 } // namespace nc
nc::NdArray::item
value_type item() const
Definition: NdArrayCore.hpp:2958
nc::filter::boundary::addBoundary1d
NdArray< dtype > addBoundary1d(const NdArray< dtype > &inImage, Boundary inBoundaryType, uint32 inKernalSize, dtype inConstantValue=0)
Definition: addBoundary1d.hpp:62
nc::NdArray::max
NdArray< dtype > max(Axis inAxis=Axis::NONE) const
Definition: NdArrayCore.hpp:2979
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:4326
nc::filter::maximumFilter1d
NdArray< dtype > maximumFilter1d(const NdArray< dtype > &inImageArray, uint32 inSize, Boundary inBoundaryType=Boundary::REFLECT, dtype inConstantValue=0)
Definition: maximumFilter1d.hpp:55
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::Slice
A Class for slicing into NdArrays.
Definition: Slice.hpp:44
Slice.hpp