diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index 9094566e..b673415d 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -296,7 +296,7 @@ CPhoneDevice::CPhoneCamera::~CPhoneCamera()
     m_dev = NULL;
 }
 
-bool CPhoneDevice::CPhoneCamera::on_image(cv::Mat& rgb)
+bool CPhoneDevice::CPhoneCamera::on_image(cv::Mat rgb)
 {
     if (m_dev != NULL)
     {
@@ -3046,7 +3046,7 @@ int CPhoneDevice::CallExecv(int rotation, int frontCamera, const std::string& ou
     return exitCode;
 }
 
-bool CPhoneDevice::OnImageReady(cv::Mat& mat)
+bool CPhoneDevice::OnImageReady(cv::Mat mat)
 {
     time_t takingTime = time(NULL);
     if (mPhotoInfo.remedy != 0)
@@ -3364,7 +3364,7 @@ bool CPhoneDevice::OnImageReady(cv::Mat& mat)
     return res;
 }
 
-bool CPhoneDevice::PostProcessPhoto(const PHOTO_INFO& photoInfo, const vector<IDevice::OSD_INFO>& osds, const std::string& path, const std::string& cameraInfo, cv::Mat& mat)
+bool CPhoneDevice::PostProcessPhoto(const PHOTO_INFO& photoInfo, const vector<IDevice::OSD_INFO>& osds, const std::string& path, const std::string& cameraInfo, cv::Mat mat)
 {
     int baseline = 0;
     cv::Size textSize;
@@ -3598,6 +3598,12 @@ bool CPhoneDevice::PostProcessPhoto(const PHOTO_INFO& photoInfo, const vector<ID
         strcpy(log, fullPath.c_str());
 #endif
         bool res = cv::imwrite(fullPath.c_str(), mat, params);
+#ifdef _DEBUG
+        if (getFileSize(fullPath.c_str()) == 0)
+        {
+            int aa = 0;
+        }
+#endif
         if (!res)
         {
             XYLOG(XYLOG_SEVERITY_ERROR, "Failed to Write File: %s", fullPath.c_str() + m_appPath.size());
@@ -3616,7 +3622,7 @@ bool CPhoneDevice::PostProcessPhoto(const PHOTO_INFO& photoInfo, const vector<ID
     return res;
 }
 
-bool CPhoneDevice::OnCaptureReady(bool photoOrVideo, bool result, cv::Mat& mat, unsigned int photoId)
+bool CPhoneDevice::OnCaptureReady(bool photoOrVideo, bool result, cv::Mat mat, unsigned int photoId)
 {
     XYLOG(XYLOG_SEVERITY_INFO, "RAW Capture finished: %u RES=%d", photoId, (result ? 1 : 0));
     if (photoOrVideo)
diff --git a/app/src/main/cpp/PhoneDevice.h b/app/src/main/cpp/PhoneDevice.h
index 020b1236..7dd50f0d 100644
--- a/app/src/main/cpp/PhoneDevice.h
+++ b/app/src/main/cpp/PhoneDevice.h
@@ -172,7 +172,7 @@ public:
 	public:
 		CPhoneCamera(CPhoneDevice* dev, int32_t width, int32_t height, const NdkCamera::CAMERA_PARAMS& params);
 		virtual ~CPhoneCamera();
-		virtual bool on_image(cv::Mat& rgb);
+		virtual bool on_image(cv::Mat rgb);
 		virtual void on_error(const std::string& msg);
 		virtual void onDisconnected(ACameraDevice* device);
 		virtual bool onBurstCapture(std::shared_ptr<ACameraMetadata> characteristics, std::vector<std::shared_ptr<ACameraMetadata> >& results, uint32_t ldr, uint32_t duration, std::vector<std::vector<uint8_t> >& frames);
@@ -248,7 +248,7 @@ public:
 
 	void UpdatePosition(double lon, double lat, double radius, time_t ts);
 	bool OnVideoReady(bool photoOrVideo, bool result, const char* path, unsigned int photoId);
-	bool OnCaptureReady(bool photoOrVideo, bool result, cv::Mat& mat, unsigned int photoId);
+	bool OnCaptureReady(bool photoOrVideo, bool result, cv::Mat mat, unsigned int photoId);
 
 	void UpdateSignalLevel(int signalLevel);
 	void UpdateTfCardPath(const std::string& tfCardPath)
@@ -273,7 +273,7 @@ protected:
 	// bool MatchCaptureSizeRequest(ACameraManager *cameraManager, const char *selectedCameraId, unsigned int width, unsigned int height, uint32_t cameraOrientation_,
 
 	bool TakePhotoWithNetCamera(IDevice::PHOTO_INFO& localPhotoInfo, const std::string& path, std::vector<IDevice::OSD_INFO>& osds, std::shared_ptr<PowerControl> powerCtrlPtr);
-    bool PostProcessPhoto(const PHOTO_INFO& photoInfo, const vector<IDevice::OSD_INFO>& osds, const std::string& path, const std::string& cameraInfo, cv::Mat& mat);
+    bool PostProcessPhoto(const PHOTO_INFO& photoInfo, const vector<IDevice::OSD_INFO>& osds, const std::string& path, const std::string& cameraInfo, cv::Mat mat);
     inline bool TakePhotoCb(int res, const IDevice::PHOTO_INFO& photoInfo, const string& path, time_t photoTime, const std::vector<IDevice::RECOG_OBJECT>& objects) const
     {
         if (m_listener != NULL)
@@ -318,7 +318,7 @@ protected:
 	void QueryPowerInfo(std::map<std::string, std::string>& powerInfo);
     std::string QueryCpuTemperature();
 
-	bool OnImageReady(cv::Mat& mat);
+	bool OnImageReady(cv::Mat mat);
 	bool onOneCapture(std::shared_ptr<ACameraMetadata> characteristics, std::shared_ptr<ACameraMetadata> results, uint32_t ldr, uint32_t duration, cv::Mat rgb);
     bool onBurstCapture(std::shared_ptr<ACameraMetadata> characteristics, std::vector<std::shared_ptr<ACameraMetadata> >& results, uint32_t ldr, uint32_t duration, std::vector<std::vector<uint8_t> >& frames);
     bool onBurstCapture(std::shared_ptr<ACameraMetadata> characteristics, std::vector<std::shared_ptr<ACameraMetadata> >& results, uint32_t ldr, uint32_t duration, std::vector<std::shared_ptr<AImage> >& frames);
diff --git a/app/src/main/cpp/camera2/ndkcamera.cpp b/app/src/main/cpp/camera2/ndkcamera.cpp
index f2ca1508..9cf6950d 100644
--- a/app/src/main/cpp/camera2/ndkcamera.cpp
+++ b/app/src/main/cpp/camera2/ndkcamera.cpp
@@ -1376,7 +1376,7 @@ void NdkCamera::onDisconnected(ACameraDevice* device)
 {
 }
 
-bool NdkCamera::on_image(cv::Mat& rgb)
+bool NdkCamera::on_image(cv::Mat rgb)
 {
 	return false;
 }
diff --git a/app/src/main/cpp/camera2/ndkcamera.h b/app/src/main/cpp/camera2/ndkcamera.h
index d8e8bdf0..72b3a77f 100644
--- a/app/src/main/cpp/camera2/ndkcamera.h
+++ b/app/src/main/cpp/camera2/ndkcamera.h
@@ -165,7 +165,7 @@ public:
 
     void DestroySession();
 
-    virtual bool on_image(cv::Mat& rgb);
+    virtual bool on_image(cv::Mat rgb);
     virtual void on_error(const std::string& msg);
     virtual void on_image(const unsigned char* nv21, int nv21_width, int nv21_height);
     virtual void onDisconnected(ACameraDevice* device);