add face recognition support to the system

facerecognizer.h

@@ -0,0 +1,41 @@
+#pragma once
+#include <exception>
+#include <opencv2/core/mat.hpp>
+#include <opencv2/objdetect/face.hpp>
+#include <opencv2/core.hpp>
+#include <vector>
+#include <memory>
+#include <filesystem>
+
+class FaceRecognizer
+{
+public:
+
+	class LoadException : public std::exception
+	{
+	private:
+		std::string message;
+	public:
+		LoadException(const std::string& msg): std::exception(), message(msg) {}
+		virtual const char* what() const throw() override
+		{
+			return message.c_str();
+		}
+	};
+
+private:
+	std::vector<cv::Mat> referanceFeatures;
+	std::shared_ptr<cv::FaceRecognizerSF> recognizer;
+	std::shared_ptr<cv::FaceDetectorYN> detector;
+
+	double threshold = 0.363;
+
+public:
+	FaceRecognizer(std::filesystem::path recognizerPath = "", const std::filesystem::path& detectorPath = "", const std::vector<cv::Mat>& referances = std::vector<cv::Mat>());
+	cv::Mat detectFaces(const cv::Mat& input);
+	std::pair<int, double> isMatch(const cv::Mat& input, bool alone = false);
+	bool addReferances(const std::vector<cv::Mat>& referances);
+	void setThreshold(double threashold);
+	double getThreshold();
+	void clearReferances();
+};