| /* |
| * Copyright (c) 2016-2018 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. |
| */ |
| #ifndef __ARM_COMPUTE_NEHOGDESCRIPTORKERNEL_H__ |
| #define __ARM_COMPUTE_NEHOGDESCRIPTORKERNEL_H__ |
| |
| #include "arm_compute/core/IHOG.h" |
| #include "arm_compute/core/NEON/INEKernel.h" |
| #include "arm_compute/core/Size2D.h" |
| |
| namespace arm_compute |
| { |
| class ITensor; |
| |
| /** NEON kernel to perform HOG Orientation Binning */ |
| class NEHOGOrientationBinningKernel : public INEKernel |
| { |
| public: |
| const char *name() const override |
| { |
| return "NEHOGOrientationBinningKernel"; |
| } |
| /** Default constructor */ |
| NEHOGOrientationBinningKernel(); |
| /** Prevent instances of this class from being copied (As this class contains pointers) */ |
| NEHOGOrientationBinningKernel(const NEHOGOrientationBinningKernel &) = delete; |
| /** Prevent instances of this class from being copied (As this class contains pointers) */ |
| NEHOGOrientationBinningKernel &operator=(const NEHOGOrientationBinningKernel &) = delete; |
| /** Allow instances of this class to be moved */ |
| NEHOGOrientationBinningKernel(NEHOGOrientationBinningKernel &&) = default; |
| /** Allow instances of this class to be moved */ |
| NEHOGOrientationBinningKernel &operator=(NEHOGOrientationBinningKernel &&) = default; |
| /** Default destructor */ |
| ~NEHOGOrientationBinningKernel() = default; |
| |
| /** Initialise the kernel's inputs, output and HOG's metadata |
| * |
| * @param[in] input_magnitude Input tensor which stores the magnitude of the gradient for each pixel. Data type supported: S16. |
| * @param[in] input_phase Input tensor which stores the phase of the gradient for each pixel. Data type supported: U8 |
| * @param[out] output Output tensor which stores the local HOG for each cell. Data type supported: F32. Number of channels supported: equal to the number of histogram bins per cell |
| * @param[in] hog_info HOG's metadata |
| */ |
| void configure(const ITensor *input_magnitude, const ITensor *input_phase, ITensor *output, const HOGInfo *hog_info); |
| |
| // Inherited methods overridden: |
| void run(const Window &window, const ThreadInfo &info) override; |
| |
| private: |
| /** Common signature for all the specialised block normalization functions |
| * |
| * @param[in] mag_row_ptr Pointer to the first row of the cell in the magnitude tensor |
| * @param[in] phase_row_ptr Pointer to the first row of the cell in the phase tensor |
| * @param[out] output_ptr Pointer to the output cell of hog space tensor |
| * @param[in] mag_stride Stride of the magnitude tensor |
| * @param[in] phase_stride Stride of the phase tensor |
| * @param[in] cell_width Width of the cell |
| * @param[in] cell_height Height of the cell |
| * @param[in] num_bins Number of bins for each cell |
| * @param[in] phase_scale Scale factor to apply to the phase in order to calculate the histogram index |
| */ |
| using OrientBinFunc = void(const int16_t *__restrict mag_row_ptr, const uint8_t *__restrict phase_row_ptr, float *__restrict output_ptr, size_t mag_stride, size_t phase_stride, size_t cell_width, |
| size_t cell_height, size_t num_bins, float phase_scale); |
| /** Orientation binning function to use for the particular cell width passed to configure() */ |
| OrientBinFunc *_func; |
| const ITensor *_input_magnitude; |
| const ITensor *_input_phase; |
| ITensor *_output; |
| size_t _cell_width; |
| size_t _cell_height; |
| size_t _num_bins; |
| float _phase_scale; |
| }; |
| |
| /** NEON kernel to perform HOG block normalization */ |
| class NEHOGBlockNormalizationKernel : public INEKernel |
| { |
| public: |
| const char *name() const override |
| { |
| return "NEHOGBlockNormalizationKernel"; |
| } |
| /** Default constructor */ |
| NEHOGBlockNormalizationKernel(); |
| /** Prevent instances of this class from being copied (As this class contains pointers) */ |
| NEHOGBlockNormalizationKernel(const NEHOGBlockNormalizationKernel &) = delete; |
| /** Prevent instances of this class from being copied (As this class contains pointers) */ |
| NEHOGBlockNormalizationKernel &operator=(const NEHOGBlockNormalizationKernel &) = delete; |
| /** Allow instances of this class to be moved */ |
| NEHOGBlockNormalizationKernel(NEHOGBlockNormalizationKernel &&) = default; |
| /** Allow instances of this class to be moved */ |
| NEHOGBlockNormalizationKernel &operator=(NEHOGBlockNormalizationKernel &&) = default; |
| /** Default destructor */ |
| ~NEHOGBlockNormalizationKernel() = default; |
| |
| /** Initialise the kernel's input, output and HOG's metadata |
| * |
| * @param[in] input Input tensor which stores the local HOG for each cell. Data type supported: F32. Number of channels supported: equal to the number of histogram bins per cell |
| * @param[out] output Output tensor which stores the normalised blocks. Data type supported: F32. Number of channels supported: equal to the number of histogram bins per block |
| * @param[in] hog_info HOG's metadata |
| */ |
| void configure(const ITensor *input, ITensor *output, const HOGInfo *hog_info); |
| |
| // Inherited methods overridden: |
| void run(const Window &window, const ThreadInfo &info) override; |
| |
| private: |
| /** Common signature for all the specialised block normalization functions |
| * |
| * @param[in] input_row_ptr Pointer to the first row of the block in the input hog space tensor |
| * @param[out] output_ptr Pointer to the output block of the hog normalized space |
| * @param[in] input_stride Stride of the input hog space tensor |
| * @param[in] num_cells_per_block_height Number of cells per block along the Y direction |
| * @param[in] num_bins_block_x Number of bins per block along the X direction |
| * @param[in] num_bins_block Number of total bins per block |
| * @param[in] l2_hyst_threshold Threshold to use for l2 hysteresis normalization |
| */ |
| using BlockNormFunc = void(const float *input_row_ptr, float *output_ptr, size_t input_stride, size_t num_cells_per_block_height, size_t num_bins_block_x, size_t num_bins_block, |
| float l2_hyst_threshold); |
| /** Block normalization function to use for the particular normalization type passed to configure() */ |
| BlockNormFunc *_func; |
| const ITensor *_input; |
| ITensor *_output; |
| Size2D _num_cells_per_block; |
| Size2D _num_cells_per_block_stride; |
| size_t _num_bins; |
| float _l2_hyst_threshold; |
| }; |
| } // namespace arm_compute |
| #endif /* __ARM_COMPUTE_NEHOGDESCRIPTORKERNEL_H__ */ |