added edge detection with camera feed

contour_detection.cpp

@@ -0,0 +1,37 @@
+#include <iostream>
+#include <opencv2/opencv.hpp>
+#include <opencv2/highgui/highgui.hpp>
+#include <opencv2/videoio.hpp>
+int main()
+{
+	cv::VideoCapture camera(0);
+	if (!camera.isOpened())
+	{
+		std::cerr << "[ERROR] Could not open the camera!" << std::endl;
+		return 1;
+	}
+	//cv::namedWindow("Webcam", cv::WINDOW_AUTOSIZE);
+	while(true)
+	{
+		cv::Mat frame;
+		camera >> frame;
+		cv::imshow("Webcam", frame);
+		cv::Mat frame_gray;
+		cv::cvtColor(frame, frame_gray, cv::COLOR_BGR2GRAY);
+		cv::imshow("gray", frame_gray);
+		cv::Mat frame_thresh;
+		threshold(frame_gray, frame_thresh, 150, 255, cv::THRESH_BINARY);
+		cv::imshow("thresh", frame_thresh);
+		std::vector<std::vector<cv::Point>> contours;
+std::vector<cv::Vec4i> hierarchy;
+		findContours(frame_thresh, contours, hierarchy, cv::RETR_TREE, cv::CHAIN_APPROX_NONE);
+		cv::Mat frame_contours = frame.clone();
+		drawContours(frame_contours, contours, -1, cv::Scalar(255, 0, 0), 2);
+		cv::imshow("contours", frame_contours);
+		if (cv::waitKey(30) >= 0){
+		
+			break;
+		}
+	}
+	return 0;
+}

makefile

@@ -1,5 +1,8 @@
-all: hello_world
-	g++ hello_world.o -o hello_world -L/usr/lib/x86_64-linux-gnu -lopencv_core -lopencv_highgui -lopencv_imgproc
+all: contour_detection
+	g++ contour_detection.o -o contour_detection -L/usr/lib/x86_64-linux-gnu -lopencv_core -lopencv_highgui -lopencv_imgproc -lopencv_imgcodecs -lopencv_videoio
+
+contour_detection: contour_detection.cpp
+	g++ -c contour_detection.cpp -I/usr/include/opencv4/opencv2 -I/usr/include/opencv4
 
 main: main.cpp
 	g++ -c main.cpp -I/usr/include/opencv4