diff --git a/ECTrainer2/Marker.cpp b/ECTrainer2/Marker.cpp
index 70915ff..b85c106 100644
--- a/ECTrainer2/Marker.cpp
+++ b/ECTrainer2/Marker.cpp
@@ -83,6 +83,8 @@
 	cv::Mat gazeIe = h * gazeVe;
 
 	double* pgazeIe = gazeIe.ptr<double>(0);
+	if (*(pgazeIe + 2) == 0) return cv::Point2f(-1.F, -1.F);
+
 	float x = (float)(*pgazeIe / *(pgazeIe + 2));
 	float y = (float)(*(pgazeIe + 1) / *(pgazeIe + 2));
 	//std::cout << x << "," << y << std::endl;
diff --git a/ECTrainer2/TobiiREST.h b/ECTrainer2/TobiiREST.h
index 812d573..c55f682 100644
--- a/ECTrainer2/TobiiREST.h
+++ b/ECTrainer2/TobiiREST.h
@@ -12,7 +12,6 @@
 	utility::string_t _ProjectID;
 	utility::string_t _ParticipantID;
 	utility::string_t _CalibrationID;
-	//bool _CalibTrigger;
 	int _BatteryLevel;			// ���ڑ��� 999
 	DWORD _lastBatteryQuery;		// �O��̃o�b�e���[���擾����
 
@@ -26,10 +25,10 @@
 	bool Routine();
 
 public:
-
+	// �R���X�g���N�^
 	TobiiREST(ECTrainer* pEct);
+	// ������
 	bool Init();
-	//void StartCalibration() { 
-	//	_CalibTrigger = true; };
+	// �o�b�e���[�c�ʎ擾
 	int GetBatteryLevel() { return _BatteryLevel; };
 };