diff --git a/src/computervision/OpenPoseVideo.cpp b/src/computervision/OpenPoseVideo.cpp
index dbaf6e5..33527a1 100644
--- a/src/computervision/OpenPoseVideo.cpp
+++ b/src/computervision/OpenPoseVideo.cpp
@@ -42,9 +42,11 @@ namespace computervision
 
 	void OpenPoseVideo::setup() {
 		net = readNetFromCaffe(protoFile, weightsFile);
+
+		net.setPreferableBackend(DNN_TARGET_CPU);
 	}
 
-	void OpenPoseVideo::movementSkeleton(Mat inputImage, std::function<void(std::vector<Point>,cv::Mat poinst_on_image)> f) {
+	void OpenPoseVideo::movementSkeleton(Mat& inputImage, std::function<void(std::vector<Point>&, cv::Mat& poinst_on_image)> f) {
 		std::cout << "movement skeleton start" << std::endl;
 
 		int inWidth = 368;
@@ -67,6 +69,7 @@ namespace computervision
 
 		std::cout << "done setting input to net" << std::endl;
 		Mat output = net.forward();
+		std::cout << "time took to set input and forward: " << t << std::endl;
 
 		int H = output.size[2];
 		int W = output.size[3];
diff --git a/src/computervision/OpenPoseVideo.h b/src/computervision/OpenPoseVideo.h
index 7f61449..e05737d 100644
--- a/src/computervision/OpenPoseVideo.h
+++ b/src/computervision/OpenPoseVideo.h
@@ -13,7 +13,7 @@ namespace computervision
 	private:
 
 	public:
-		void movementSkeleton(Mat inputImage,std::function<void(std::vector<Point>, cv::Mat poinst_on_image)> f);
+		void movementSkeleton(Mat& inputImage, std::function<void(std::vector<Point>&, cv::Mat& poinst_on_image)> f);
 		void setup();
 	};
 }
diff --git a/src/main.cpp b/src/main.cpp
index 260694c..d1ef94e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -87,10 +87,11 @@ int main(void)
 
 	// set up object detection
 	//objDetect.setup();
-	cv::VideoCapture cam = objDetect.getCap();
+	//cv::VideoCapture cam = objDetect.getCap();
 	cv::Mat img;
-	cam.read(img);
-	imshow("camera in main loop", img);
+	cv::VideoCapture cap = objDetect.getCap();
+	//cam.read(img);
+	//imshow("camera in main loop", img);
 
 
 	computervision::AsyncArmDetection as;