Compute Library
 21.02
Phase.cpp
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24 #include "Phase.h"
25 
26 namespace arm_compute
27 {
28 namespace test
29 {
30 namespace validation
31 {
32 namespace reference
33 {
34 template <typename T>
36 {
37  const float PI = std::atan(1) * 4;
39 
40  if(phase_type == PhaseType::UNSIGNED) // unsigned: map to [0-255)
41  {
42  for(int i = 0; i < gx.num_elements(); ++i)
43  {
44  float angle_deg = (std::atan2(float(gy[i]), float(gx[i])) / PI) * 180.0f;
45  phase[i] = (angle_deg < 0.0f) ? 180.f + angle_deg : angle_deg;
46  }
47  }
48  else // signed: map to [0-180) degrees
49  {
50  for(int i = 0; i < gx.num_elements(); ++i)
51  {
52  float angle_pi = std::atan2(gy[i], gx[i]) / PI;
53  angle_pi = (angle_pi < 0.0f) ? 2 + angle_pi : angle_pi;
54  phase[i] = lround(angle_pi * 128) & 0xFFu;
55  }
56  }
57 
58  return phase;
59 }
60 
61 template SimpleTensor<uint8_t> phase(const SimpleTensor<int16_t> &gx, const SimpleTensor<int16_t> &gy, PhaseType phase_type);
62 template SimpleTensor<uint8_t> phase(const SimpleTensor<int32_t> &gx, const SimpleTensor<int32_t> &gy, PhaseType phase_type);
63 } // namespace reference
64 } // namespace validation
65 } // namespace test
66 } // namespace arm_compute
Angle range: [0, 180].
PhaseType
Phase calculation type.
Definition: Types.h:432
1 channel, 1 U8 per channel
SimpleTensor< uint8_t > phase(const SimpleTensor< T > &gx, const SimpleTensor< T > &gy, PhaseType phase_type)
Definition: Phase.cpp:35
TensorShape shape() const override
Shape of the tensor.
Definition: SimpleTensor.h:320
Copyright (c) 2017-2021 Arm Limited.
int num_elements() const override
Number of elements of the tensor.
Definition: SimpleTensor.h:406