[ADD] hand calibration screen

src/computervision/calibration/HandCalibrator.cpp

@@ -0,0 +1,68 @@
+
+#include "HandCalibrator.h"
+
+#define MIN_HAND_SIZE 10000
+namespace computervision
+{
+	namespace handcalibration
+	{
+
+		static bool background_calibrated;
+		static bool skintone_calibrated;
+		static bool hand_present;
+
+		HandCalibrator::HandCalibrator()
+		{
+
+		}
+
+		void HandCalibrator::DrawHandCalibrationText(cv::Mat& output_frame)
+		{
+			cv::rectangle(output_frame,cv::Rect(0, 0, output_frame.cols, 40),cv::Scalar(0,0,0),-1);
+			cv::putText(output_frame, "Hand calibration", cv::Point(output_frame.cols/2-100, 25), cv::FONT_HERSHEY_PLAIN, 2.0, cv::Scalar(18, 219, 65), 2);
+			cv::putText(output_frame, "press 'b' to calibrate background,then press 's' to calibrate skin tone", cv::Point(5, 35), cv::FONT_HERSHEY_PLAIN, 1.0, cv::Scalar(18, 219, 65), 1);
+
+			cv::putText(output_frame, "hand in frame:", cv::Point(5, output_frame.rows - 50), cv::FONT_HERSHEY_PLAIN, 2.0, cv::Scalar(255, 255, 0), 1);
+			cv::rectangle(output_frame, cv::Rect(270, output_frame.rows - 70, 20, 20),  hand_present ? cv::Scalar(0, 255, 0) : cv::Scalar(0,0,255), -1);
+
+
+			cv::putText(output_frame, (background_calibrated ? "background calibrated" : "background not calibrated"), cv::Point(5, output_frame.rows-30), cv::FONT_HERSHEY_PLAIN, 2.0, cv::Scalar(255, 255, 0), 1);
+			cv::putText(output_frame, (skintone_calibrated ? "skincolor calibrated" : "skincolor not calibrated"), cv::Point(5, output_frame.rows-10), cv::FONT_HERSHEY_PLAIN, 2.0, cv::Scalar(255, 255, 0), 1);
+		}
+
+		void HandCalibrator::SetSkinCalibration(bool val)
+		{
+			skintone_calibrated = val;
+		}
+
+		void HandCalibrator::SetBackGroundCalibrated(bool val)
+		{
+			background_calibrated = val;
+		}
+
+		void HandCalibrator::SetHandPresent(bool val)
+		{
+			hand_present = val;
+		}
+
+		bool HandCalibrator::CheckIfHandPresent(cv::Mat input_image)
+		{
+			std::vector<std::vector<cv::Point>> points;
+			cv::findContours(input_image, points, cv::RetrievalModes::RETR_LIST, cv::ContourApproximationModes::CHAIN_APPROX_SIMPLE);
+
+			if (points.size() == 0) return false;
+
+			for (int p = 0; p < points.size(); p++)
+			{
+				int area = cv::contourArea(points[p]);
+				if (area > MIN_HAND_SIZE) return true;
+			}
+
+			return false;
+		}
+
+
+
+
+	}
+}