ncnn_yolor.h
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//
// Created by DefTruth on 2021/11/7.
//
#ifndef LITE_AI_TOOLKIT_NCNN_CV_NCNN_YOLOR_H
#define LITE_AI_TOOLKIT_NCNN_CV_NCNN_YOLOR_H
#include "lite/ncnn/core/ncnn_core.h"
namespace ncnncv
{
class LITE_EXPORTS NCNNYoloR
{
private:
ncnn::Net *net = nullptr;
const char *log_id = nullptr;
const char *param_path = nullptr;
const char *bin_path = nullptr;
std::vector<const char *> input_names;
std::vector<const char *> output_names;
std::vector<int> input_indexes;
std::vector<int> output_indexes;
private:
// nested classes
typedef struct
{
int grid0;
int grid1;
int stride;
float width;
float height;
} YoloRAnchor;
typedef struct
{
float r;
int dw;
int dh;
int new_unpad_w;
int new_unpad_h;
bool flag;
} YoloRScaleParams;
public:
explicit NCNNYoloR(const std::string &_param_path,
const std::string &_bin_path,
unsigned int _num_threads = 1,
int _input_height = 640,
int _input_width = 640); //
~NCNNYoloR();
private:
const unsigned int num_threads; // initialize at runtime.
// target image size after resize
const int input_height; // 640/320
const int input_width; // 640/320
const float mean_vals[3] = {0.f, 0.f, 0.f}; // RGB
const float norm_vals[3] = {1.0 / 255.f, 1.0 / 255.f, 1.0 / 255.f};
const char *class_names[80] = {
"person", "bicycle", "car", "motorcycle", "airplane", "bus", "train", "truck", "boat", "traffic light",
"fire hydrant", "stop sign", "parking meter", "bench", "bird", "cat", "dog", "horse", "sheep", "cow",
"elephant", "bear", "zebra", "giraffe", "backpack", "umbrella", "handbag", "tie", "suitcase", "frisbee",
"skis", "snowboard", "sports ball", "kite", "baseball bat", "baseball glove", "skateboard", "surfboard",
"tennis racket", "bottle", "wine glass", "cup", "fork", "knife", "spoon", "bowl", "banana", "apple",
"sandwich", "orange", "broccoli", "carrot", "hot dog", "pizza", "donut", "cake", "chair", "couch",
"potted plant", "bed", "dining table", "toilet", "tv", "laptop", "mouse", "remote", "keyboard",
"cell phone", "microwave", "oven", "toaster", "sink", "refrigerator", "book", "clock", "vase",
"scissors", "teddy bear", "hair drier", "toothbrush"
};
enum NMS
{
HARD = 0, BLEND = 1, OFFSET = 2
};
static constexpr const unsigned int nms_pre = 1000;
static constexpr const unsigned int max_nms = 30000;
std::vector<unsigned int> strides = {8, 16, 32, 64};
std::unordered_map<unsigned int, std::vector<YoloRAnchor>> center_anchors;
bool center_anchors_is_update = false;
protected:
NCNNYoloR(const NCNNYoloR &) = delete; //
NCNNYoloR(NCNNYoloR &&) = delete; //
NCNNYoloR &operator=(const NCNNYoloR &) = delete; //
NCNNYoloR &operator=(NCNNYoloR &&) = delete; //
private:
void print_debug_string();
void transform(const cv::Mat &mat_rs, ncnn::Mat &in);
void resize_unscale(const cv::Mat &mat,
cv::Mat &mat_rs,
int target_height,
int target_width,
YoloRScaleParams &scale_params);
// only generate once
void generate_anchors(unsigned int target_height, unsigned int target_width);
void generate_bboxes_single_stride(const YoloRScaleParams &scale_params,
ncnn::Mat &det_pred,
unsigned int stride,
float score_threshold,
float img_height,
float img_width,
std::vector<types::Boxf> &bbox_collection);
void generate_bboxes(const YoloRScaleParams &scale_params,
ncnn::Extractor &extractor,
std::vector<types::Boxf> &bbox_collection,
float score_threshold, float img_height,
float img_width);
void nms(std::vector<types::Boxf> &input, std::vector<types::Boxf> &output,
float iou_threshold, unsigned int topk, unsigned int nms_type);
public:
void detect(const cv::Mat &mat,
std::vector<types::Boxf> &detected_boxes,
float score_threshold = 0.25f, float iou_threshold = 0.45f,
unsigned int topk = 100, unsigned int nms_type = NMS::OFFSET);
};
}
#endif //LITE_AI_TOOLKIT_NCNN_CV_NCNN_YOLOR_H