1 /* 2 * Copyright (c) 2016-2020 Arm Limited. 3 * 4 * SPDX-License-Identifier: MIT 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in all 14 * copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24 #ifndef ARM_COMPUTE_NEHOGDETECTORKERNEL_H 25 #define ARM_COMPUTE_NEHOGDETECTORKERNEL_H 26 27 #include "arm_compute/core/IArray.h" 28 #include "arm_compute/core/IHOG.h" 29 #include "src/core/NEON/INEKernel.h" 30 #include "support/Mutex.h" 31 32 namespace arm_compute 33 { 34 class ITensor; 35 36 /** NEON kernel to perform HOG detector kernel using linear SVM */ 37 class NEHOGDetectorKernel : public INEKernel 38 { 39 public: name()40 const char *name() const override 41 { 42 return "NEHOGDetectorKernel"; 43 } 44 /** Default constructor */ 45 NEHOGDetectorKernel(); 46 /** Prevent instances of this class from being copied (As this class contains pointers) */ 47 NEHOGDetectorKernel(const NEHOGDetectorKernel &) = delete; 48 /** Prevent instances of this class from being copied (As this class contains pointers) */ 49 NEHOGDetectorKernel &operator=(const NEHOGDetectorKernel &) = delete; 50 /** Prevent instances of this class from being moved (As this class contains non movable objects) */ 51 NEHOGDetectorKernel(NEHOGDetectorKernel &&) = delete; 52 /** Prevent instances of this class from being moved (As this class contains non movable objects) */ 53 NEHOGDetectorKernel &operator=(NEHOGDetectorKernel &&) = delete; 54 /** Default destructor */ 55 ~NEHOGDetectorKernel() = default; 56 57 /** Initialise the kernel's input, HOG data-object, detection window, the stride of the detection window, the threshold and index of the object to detect 58 * 59 * @param[in] input Input tensor which stores the HOG descriptor obtained with @ref NEHOGOrientationBinningKernel. Data type supported: F32. Number of channels supported: equal to the number of histogram bins per block 60 * @param[in] hog HOG data object used by @ref NEHOGOrientationBinningKernel and @ref NEHOGBlockNormalizationKernel 61 * @param[out] detection_windows Array of @ref DetectionWindow. This array stores all the detected objects 62 * @param[in] detection_window_stride Distance in pixels between 2 consecutive detection windows in x and y directions. 63 * It must be multiple of the hog->info()->block_stride() 64 * @param[in] threshold (Optional) Threshold for the distance between features and SVM classifying plane 65 * @param[in] idx_class (Optional) Index of the class used for evaluating which class the detection window belongs to 66 */ 67 void configure(const ITensor *input, const IHOG *hog, IDetectionWindowArray *detection_windows, const Size2D &detection_window_stride, float threshold = 0.0f, uint16_t idx_class = 0); 68 69 // Inherited methods overridden: 70 void run(const Window &window, const ThreadInfo &info) override; 71 72 private: 73 const ITensor *_input; 74 IDetectionWindowArray *_detection_windows; 75 const float *_hog_descriptor; 76 float _bias; 77 float _threshold; 78 uint16_t _idx_class; 79 size_t _num_bins_per_descriptor_x; 80 size_t _num_blocks_per_descriptor_y; 81 size_t _block_stride_width; 82 size_t _block_stride_height; 83 size_t _detection_window_width; 84 size_t _detection_window_height; 85 size_t _max_num_detection_windows; 86 arm_compute::Mutex _mutex; 87 }; 88 } // namespace arm_compute 89 #endif /* ARM_COMPUTE_NEHOGDETECTORKERNEL_H */ 90