COMPMID-344 Updated doxygen

Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae

1 files changed, 231 insertions, 0 deletions

diff --git a/src/runtime/NEON/functions/NEHOGMultiDetection.cpp b/src/runtime/NEON/functions/NEHOGMultiDetection.cpp
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+++ b/src/runtime/NEON/functions/NEHOGMultiDetection.cpp
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+/*
+ * Copyright (c) 2016, 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "arm_compute/runtime/NEON/functions/NEHOGMultiDetection.h"
+
+#include "arm_compute/core/Error.h"
+#include "arm_compute/core/Helpers.h"
+#include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/runtime/NEON/NEScheduler.h"
+#include "arm_compute/runtime/Tensor.h"
+
+using namespace arm_compute;
+
+NEHOGMultiDetection::NEHOGMultiDetection()
+    : _gradient_kernel(), _orient_bin_kernel(), _block_norm_kernel(), _hog_detect_kernel(), _non_maxima_kernel(), _hog_space(), _hog_norm_space(), _detection_windows(), _mag(), _phase(),
+      _non_maxima_suppression(false), _num_orient_bin_kernel(0), _num_block_norm_kernel(0), _num_hog_detect_kernel(0)
+{
+}
+
+void NEHOGMultiDetection::configure(ITensor *input, const IMultiHOG *multi_hog, IDetectionWindowArray *detection_windows, const ISize2DArray *detection_window_strides, BorderMode border_mode,
+                                    uint8_t constant_border_value, float threshold, bool non_maxima_suppression, float min_distance)
+{
+    ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8);
+    ARM_COMPUTE_ERROR_ON_INVALID_MULTI_HOG(multi_hog);
+    ARM_COMPUTE_ERROR_ON(nullptr == detection_windows);
+    ARM_COMPUTE_ERROR_ON(detection_window_strides->num_values() != multi_hog->num_models());
+
+    const size_t       width      = input->info()->dimension(Window::DimX);
+    const size_t       height     = input->info()->dimension(Window::DimY);
+    const TensorShape &shape_img  = input->info()->tensor_shape();
+    const size_t       num_models = multi_hog->num_models();
+    PhaseType          phase_type = multi_hog->model(0)->info()->phase_type();
+
+    size_t prev_num_bins     = multi_hog->model(0)->info()->num_bins();
+    Size2D prev_cell_size    = multi_hog->model(0)->info()->cell_size();
+    Size2D prev_block_size   = multi_hog->model(0)->info()->block_size();
+    Size2D prev_block_stride = multi_hog->model(0)->info()->block_stride();
+
+    /* Check if NEHOGOrientationBinningKernel and NEHOGBlockNormalizationKernel kernels can be skipped for a specific HOG data-object
+     *
+     * 1) NEHOGOrientationBinningKernel and NEHOGBlockNormalizationKernel are skipped if the cell size and the number of bins don't change.
+     *        Since "multi_hog" is sorted,it is enough to check the HOG descriptors at level "ith" and level "(i-1)th
+     * 2) NEHOGBlockNormalizationKernel is skipped if the cell size, the number of bins and block size do not change.
+     *         Since "multi_hog" is sorted,it is enough to check the HOG descriptors at level "ith" and level "(i-1)th
+     *
+     * @note Since the orientation binning and block normalization kernels can be skipped, we need to keep track of the input to process for each kernel
+     *       with "input_orient_bin", "input_hog_detect" and "input_block_norm"
+     */
+    std::vector<size_t> input_orient_bin;
+    std::vector<size_t> input_hog_detect;
+    std::vector<std::pair<size_t, size_t>> input_block_norm;
+
+    input_orient_bin.push_back(0);
+    input_hog_detect.push_back(0);
+    input_block_norm.emplace_back(0, 0);
+
+    for(size_t i = 1; i < num_models; ++i)
+    {
+        size_t cur_num_bins     = multi_hog->model(i)->info()->num_bins();
+        Size2D cur_cell_size    = multi_hog->model(i)->info()->cell_size();
+        Size2D cur_block_size   = multi_hog->model(i)->info()->block_size();
+        Size2D cur_block_stride = multi_hog->model(i)->info()->block_stride();
+
+        if((cur_num_bins != prev_num_bins) || (cur_cell_size.width != prev_cell_size.width) || (cur_cell_size.height != prev_cell_size.height))
+        {
+            prev_num_bins     = cur_num_bins;
+            prev_cell_size    = cur_cell_size;
+            prev_block_size   = cur_block_size;
+            prev_block_stride = cur_block_stride;
+
+            // Compute orientation binning and block normalization kernels. Update input to process
+            input_orient_bin.push_back(i);
+            input_block_norm.emplace_back(i, input_orient_bin.size() - 1);
+        }
+        else if((cur_block_size.width != prev_block_size.width) || (cur_block_size.height != prev_block_size.height) || (cur_block_stride.width != prev_block_stride.width)
+                || (cur_block_stride.height != prev_block_stride.height))
+        {
+            prev_block_size   = cur_block_size;
+            prev_block_stride = cur_block_stride;
+
+            // Compute block normalization kernel. Update input to process
+            input_block_norm.emplace_back(i, input_orient_bin.size() - 1);
+        }
+
+        // Update input to process for hog detector kernel
+        input_hog_detect.push_back(input_block_norm.size() - 1);
+    }
+
+    _detection_windows      = detection_windows;
+    _non_maxima_suppression = non_maxima_suppression;
+    _num_orient_bin_kernel  = input_orient_bin.size(); // Number of NEHOGOrientationBinningKernel kernels to compute
+    _num_block_norm_kernel  = input_block_norm.size(); // Number of NEHOGBlockNormalizationKernel kernels to compute
+    _num_hog_detect_kernel  = input_hog_detect.size(); // Number of NEHOGDetector functions to compute
+
+    _orient_bin_kernel = arm_compute::cpp14::make_unique<NEHOGOrientationBinningKernel[]>(_num_orient_bin_kernel);
+    _block_norm_kernel = arm_compute::cpp14::make_unique<NEHOGBlockNormalizationKernel[]>(_num_block_norm_kernel);
+    _hog_detect_kernel = arm_compute::cpp14::make_unique<NEHOGDetector[]>(_num_hog_detect_kernel);
+    _non_maxima_kernel = arm_compute::cpp14::make_unique<CPPDetectionWindowNonMaximaSuppressionKernel>();
+    _hog_space         = arm_compute::cpp14::make_unique<Tensor[]>(_num_orient_bin_kernel);
+    _hog_norm_space    = arm_compute::cpp14::make_unique<Tensor[]>(_num_block_norm_kernel);
+
+    // Allocate tensors for magnitude and phase
+    TensorInfo info_mag(shape_img, Format::S16);
+    _mag.allocator()->init(info_mag);
+
+    TensorInfo info_phase(shape_img, Format::U8);
+    _phase.allocator()->init(info_phase);
+
+    // Initialise gradient kernel
+    _gradient_kernel.configure(input, &_mag, &_phase, phase_type, border_mode, constant_border_value);
+
+    // Configure NETensor for the HOG space and orientation binning kernel
+    for(size_t i = 0; i < _num_orient_bin_kernel; ++i)
+    {
+        const size_t idx_multi_hog = input_orient_bin[i];
+
+        // Get the corresponding cell size and number of bins
+        const Size2D &cell     = multi_hog->model(idx_multi_hog)->info()->cell_size();
+        const size_t  num_bins = multi_hog->model(idx_multi_hog)->info()->num_bins();
+
+        // Calculate number of cells along the x and y directions for the hog_space
+        const size_t num_cells_x = width / cell.width;
+        const size_t num_cells_y = height / cell.height;
+
+        // TensorShape of hog space
+        TensorShape shape_hog_space = input->info()->tensor_shape();
+        shape_hog_space.set(Window::DimX, num_cells_x);
+        shape_hog_space.set(Window::DimY, num_cells_y);
+
+        // Allocate HOG space
+        TensorInfo info_space(shape_hog_space, num_bins, DataType::F32);
+        _hog_space[i].allocator()->init(info_space);
+
+        // Initialise orientation binning kernel
+        _orient_bin_kernel[i].configure(&_mag, &_phase, _hog_space.get() + i, multi_hog->model(idx_multi_hog)->info());
+    }
+
+    // Configure NETensor for the normalized HOG space and block normalization kernel
+    for(size_t i = 0; i < _num_block_norm_kernel; ++i)
+    {
+        const size_t idx_multi_hog  = input_block_norm[i].first;
+        const size_t idx_orient_bin = input_block_norm[i].second;
+
+        // Allocate normalized HOG space
+        TensorInfo tensor_info(*(multi_hog->model(idx_multi_hog)->info()), width, height);
+        _hog_norm_space[i].allocator()->init(tensor_info);
+
+        // Initialize block normalization kernel
+        _block_norm_kernel[i].configure(_hog_space.get() + idx_orient_bin, _hog_norm_space.get() + i, multi_hog->model(idx_multi_hog)->info());
+    }
+
+    // Configure HOG detector kernel
+    for(size_t i = 0; i < _num_hog_detect_kernel; ++i)
+    {
+        const size_t idx_block_norm = input_hog_detect[i];
+
+        _hog_detect_kernel[i].configure(_hog_norm_space.get() + idx_block_norm, multi_hog->model(i), detection_windows, detection_window_strides->at(i), threshold, i);
+    }
+
+    // Configure non maxima suppression kernel
+    _non_maxima_kernel->configure(_detection_windows, min_distance);
+
+    // Allocate intermediate tensors
+    _mag.allocator()->allocate();
+    _phase.allocator()->allocate();
+
+    for(size_t i = 0; i < _num_orient_bin_kernel; ++i)
+    {
+        _hog_space[i].allocator()->allocate();
+    }
+
+    for(size_t i = 0; i < _num_block_norm_kernel; ++i)
+    {
+        _hog_norm_space[i].allocator()->allocate();
+    }
+}
+
+void NEHOGMultiDetection::run()
+{
+    ARM_COMPUTE_ERROR_ON_MSG(_detection_windows == nullptr, "Unconfigured function");
+
+    // Reset detection window
+    _detection_windows->clear();
+
+    // Run gradient
+    _gradient_kernel.run();
+
+    // Run orientation binning kernel
+    for(size_t i = 0; i < _num_orient_bin_kernel; ++i)
+    {
+        NEScheduler::get().schedule(_orient_bin_kernel.get() + i, Window::DimY);
+    }
+
+    // Run block normalization kernel
+    for(size_t i = 0; i < _num_block_norm_kernel; ++i)
+    {
+        NEScheduler::get().schedule(_block_norm_kernel.get() + i, Window::DimY);
+    }
+
+    // Run HOG detector kernel
+    for(size_t i = 0; i < _num_hog_detect_kernel; ++i)
+    {
+        _hog_detect_kernel[i].run();
+    }
+
+    // Run non-maxima suppression kernel if enabled
+    if(_non_maxima_suppression)
+    {
+        _non_maxima_kernel->run(_non_maxima_kernel->window());
+    }
+}