Compute Library
 21.02
CPPCornerCandidatesKernel.cpp
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2  * Copyright (c) 2017-2020 Arm Limited.
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25 
29 
30 using namespace arm_compute;
31 
32 namespace
33 {
34 inline void check_corner(float x, float y, float strength, InternalKeypoint *output, int32_t *num_corner_candidates, arm_compute::Mutex *corner_candidates_mutex)
35 {
36  if(strength != 0.0f)
37  {
38  /* Set index and update num_corner_candidate */
39  arm_compute::unique_lock<arm_compute::Mutex> lock(*corner_candidates_mutex);
40 
41  const int32_t idx = *num_corner_candidates;
42 
43  *num_corner_candidates += 1;
44 
45  lock.unlock();
46 
47  /* Add keypoint */
48  output[idx] = std::make_tuple(x, y, strength);
49  }
50 }
51 
52 inline void corner_candidates(const float *__restrict input, InternalKeypoint *__restrict output, int32_t x, int32_t y, int32_t *num_corner_candidates, arm_compute::Mutex *corner_candidates_mutex)
53 {
54  check_corner(x, y, *input, output, num_corner_candidates, corner_candidates_mutex);
55 }
56 } // namespace
57 
59 {
60  return std::get<2>(lhs) > std::get<2>(rhs);
61 }
62 
64  : _num_corner_candidates(nullptr), _corner_candidates_mutex(), _input(nullptr), _output(nullptr)
65 {
66 }
67 
68 void CPPCornerCandidatesKernel::configure(const IImage *input, InternalKeypoint *output, int32_t *num_corner_candidates)
69 {
72  ARM_COMPUTE_ERROR_ON(nullptr == output);
73  ARM_COMPUTE_ERROR_ON(nullptr == num_corner_candidates);
74  ARM_COMPUTE_ERROR_ON(*num_corner_candidates != 0);
75 
76  _input = input;
77  _output = output;
78  _num_corner_candidates = num_corner_candidates;
79 
80  const unsigned int num_elems_processed_per_iteration = 1;
81 
82  // Configure kernel window
83  Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration));
84 
86 
87  ICPPKernel::configure(win);
88 }
89 
91 {
92  ARM_COMPUTE_UNUSED(info);
95  Iterator input(_input, window);
96 
97  execute_window_loop(window, [&](const Coordinates & id)
98  {
99  corner_candidates(reinterpret_cast<float *>(input.ptr()), &_output[0], id.x(), id.y(), _num_corner_candidates, &_corner_candidates_mutex);
100  },
101  input);
102 }
bool keypoint_compare(const InternalKeypoint &lhs, const InternalKeypoint &rhs)
Window calculate_max_window(const ValidRegion &valid_region, const Steps &steps, bool skip_border, BorderSize border_size)
const Window & window() const
The maximum window the kernel can be executed on.
Definition: IKernel.cpp:28
#define ARM_COMPUTE_ERROR_ON_TENSOR_NOT_2D(t)
Definition: Validate.h:856
1 channel, 1 F32 per channel
#define ARM_COMPUTE_ERROR_ON(cond)
If the condition is true then an error message is printed and an exception thrown.
Definition: Error.h:466
std::mutex Mutex
Wrapper of Mutex data-object.
Definition: Mutex.h:33
std::unique_lock< Mutex > unique_lock
Wrapper of lock_guard data-object.
Definition: Mutex.h:41
Interface for Neon tensor.
Definition: ITensor.h:36
Copyright (c) 2017-2021 Arm Limited.
bool update_window_and_padding(Window &win, Ts &&... patterns)
Update window and padding size for each of the access patterns.
Definition: WindowHelpers.h:46
#define ARM_COMPUTE_UNUSED(...)
To avoid unused variables warnings.
Definition: Error.h:152
Class to describe a number of elements in each dimension.
Definition: Steps.h:40
Coordinates of an item.
Definition: Coordinates.h:37
Implementation of a row access pattern.
void run(const Window &window, const ThreadInfo &info) override
Execute the kernel on the passed window.
virtual ITensorInfo * info() const =0
Interface to be implemented by the child class to return the tensor&#39;s metadata.
constexpr uint8_t * ptr() const
Return a pointer to the current pixel.
Definition: Helpers.inl:139
#define ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(k)
Definition: Validate.h:941
#define ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(t, c,...)
Definition: Validate.h:790
ScaleKernelInfo info(interpolation_policy, default_border_mode, PixelValue(), sampling_policy, false)
Information about executing thread and CPU.
Definition: CPPTypes.h:235
unsigned int num_elems_processed_per_iteration
void execute_window_loop(const Window &w, L &&lambda_function, Ts &&... iterators)
Iterate through the passed window, automatically adjusting the iterators and calling the lambda_funct...
Definition: Helpers.inl:77
Iterator updated by execute_window_loop for each window element.
Definition: Helpers.h:46
float y
The y coordinate.
Describe a multidimensional execution window.
Definition: Window.h:39
#define ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(f, s)
Definition: Validate.h:205
void configure(const IImage *input, InternalKeypoint *output, int32_t *num_corner_candidates)
Setup the kernel parameters.