1 /* 2 * Copyright (c) 2019 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_CPP_NONMAXIMUMSUPPRESSIONKERNEL_LAYER_H 25 #define ARM_COMPUTE_CPP_NONMAXIMUMSUPPRESSIONKERNEL_LAYER_H 26 27 #include "arm_compute/runtime/CPP/ICPPSimpleFunction.h" 28 29 #include "arm_compute/core/Types.h" 30 31 namespace arm_compute 32 { 33 class ITensor; 34 35 /** CPP Function to perform non maximum suppression on the bounding boxes and scores 36 * 37 */ 38 class CPPNonMaximumSuppressionKernel : public ICPPKernel 39 { 40 public: name()41 const char *name() const override 42 { 43 return "CPPNonMaximumSuppressionKernel"; 44 } 45 /** Default constructor */ 46 CPPNonMaximumSuppressionKernel(); 47 /** Prevent instances of this class from being copied (As this class contains pointers) */ 48 CPPNonMaximumSuppressionKernel(const CPPNonMaximumSuppressionKernel &) = delete; 49 /** Prevent instances of this class from being copied (As this class contains pointers) */ 50 CPPNonMaximumSuppressionKernel &operator=(const CPPNonMaximumSuppressionKernel &) = delete; 51 /** Allow instances of this class to be moved */ 52 CPPNonMaximumSuppressionKernel(CPPNonMaximumSuppressionKernel &&) = default; 53 /** Allow instances of this class to be moved */ 54 CPPNonMaximumSuppressionKernel &operator=(CPPNonMaximumSuppressionKernel &&) = default; 55 /** Default destructor */ 56 ~CPPNonMaximumSuppressionKernel() = default; 57 58 /** Configure the kernel to perform non maximal suppression 59 * 60 * @param[in] input_bboxes The input bounding boxes. Data types supported: F32. 61 * @param[in] input_scores The corresponding input confidence. Same as @p input_bboxes. 62 * @param[out] output_indices The kept indices of bboxes after nms. Data types supported: S32. 63 * @param[in] max_output_size An integer tensor representing the maximum number of boxes to be selected by non max suppression. 64 * @param[in] score_threshold The threshold used to filter detection results. 65 * @param[in] iou_threshold The threshold used in non maximum suppression. 66 * 67 */ 68 void configure(const ITensor *input_bboxes, const ITensor *input_scores, ITensor *output_indices, unsigned int max_output_size, const float score_threshold, const float iou_threshold); 69 70 /** Static function to check if given arguments will lead to a valid configuration of @ref CPPNonMaximumSuppressionKernel 71 * 72 * @param[in] input_bboxes The input bounding boxes tensor info. Data types supported: F32. 73 * @param[in] input_scores The corresponding input confidence tensor info. Same as @p input_bboxes. 74 * @param[out] output_indices The kept indices of bboxes after nms tensor info. Data types supported: S32. 75 * @param[in] max_output_size An integer tensor representing the maximum number of boxes to be selected by non max suppression. 76 * @param[in] score_threshold The threshold used to filter detection results. 77 * @param[in] iou_threshold The threshold used in non maximum suppression. 78 * 79 */ 80 static Status validate(const ITensorInfo *input_bboxes, const ITensorInfo *input_scores, const ITensorInfo *output_indices, unsigned int max_output_size, 81 const float score_threshold, const float iou_threshold); 82 83 // Inherited methods overridden: 84 void run(const Window &window, const ThreadInfo &info) override; 85 86 private: 87 const ITensor *_input_bboxes; 88 const ITensor *_input_scores; 89 ITensor *_output_indices; 90 unsigned int _max_output_size; 91 float _score_threshold; 92 float _iou_threshold; 93 94 unsigned int _num_boxes; 95 }; 96 } // namespace arm_compute 97 #endif /* ARM_COMPUTE_CPP_NONMAXIMUMSUPPRESSIONKERNEL_LAYER_H */ 98