LaneIn - Add Start, Stop Method.

AIParkingApplication/Camera.cs

@@ -7,9 +7,8 @@ namespace AIParkingApplication
     public class Camera
     {
         private string streamUrl;
-        private bool isCapturing;
-        private object lockSyncObject;
         private volatile bool isFrameRequested;
+        private Thread readStreamThread;
 
         public event CameraEvent OnVideoFrameReceived;
         public event CameraEvent OnOneVideoFrameRequested;
@@ -17,16 +16,24 @@ namespace AIParkingApplication
         public Camera(string streamUrl)
         {
             this.streamUrl = streamUrl;
-            isCapturing = true;
             isFrameRequested = false;
-            lockSyncObject = new object();
+            readStreamThread = new Thread(new ThreadStart(ReadVideoStream));
+            readStreamThread.IsBackground = true;
         }
 
-        public void Startcapture()
+        ~Camera()
         {
-            Thread readVideoStreamThread = new Thread(new ThreadStart(ReadVideoStream));
-            readVideoStreamThread.IsBackground = true;
-            readVideoStreamThread.Start();
+            Stop();
+        }
+
+        public void Start()
+        {
+            if (!readStreamThread.IsAlive)
+            {
+                readStreamThread = new Thread(new ThreadStart(ReadVideoStream));
+                readStreamThread.IsBackground = true;
+                readStreamThread.Start();
+            }
         }
 
         public void RequestCaptureOneFrame()
@@ -47,10 +54,6 @@ namespace AIParkingApplication
             {
                 Thread.Sleep(50);     //Stream Thread Sleep
                 //Thread.Sleep(40);     //Video Thread Sleep
-                if (!isCapturing)
-                {
-                    continue;
-                }
 
                 if (videoCapture.Read(videoFrame) && videoFrame.Width > 0 && videoFrame.Height > 0)
                 {
@@ -64,11 +67,11 @@ namespace AIParkingApplication
             }
         }
 
-        public void PauseCapture()
+        public void Stop()
         {
-            lock (lockSyncObject)
+            if (readStreamThread.IsAlive)
             {
-                isCapturing = false;
+                readStreamThread.Abort();
             }
         }
     }

AIParkingApplication/LaneIn.cs

@@ -33,9 +33,6 @@ namespace AIParkingApplication
             overviewCamera.OnVideoFrameReceived += OverviewCameraOnVideoFrameReceived;
             overviewCamera.OnOneVideoFrameRequested += OverviewCamera_OnOneVideoFrameRequested;
 
-            overviewCamera.Startcapture();
-            plateCamera.Startcapture();
-
             plateProcessor = new PlateProcessor(this.isSupportSquarePlate, this.isSupportLongPlate);
         }
 
@@ -61,6 +58,8 @@ namespace AIParkingApplication
             {
                 try
                 {
+                    //TODO: check size before resizing
+                    Cv2.Resize(videoFrame, videoFrame, new Size(1280, 720));
                     FinalPlateResult finalPlateResult = await plateProcessor.ProcessPlate(videoFrame);
 
                     if (isRetryMode && !plateProcessor.IsPlateStringValid(finalPlateResult.PlateString))
@@ -97,6 +96,18 @@ namespace AIParkingApplication
             }));
         }
 
+        public void Stop()
+        {
+            plateCamera.Stop();
+            overviewCamera.Stop();
+        }
+
+        public void Start()
+        {
+            plateCamera.Start();
+            overviewCamera.Start();
+        }
+
         private void OverviewCameraOnVideoFrameReceived(Mat videoFrame)
         {
             try

AIParkingApplication/PlateDetector.cs

@@ -29,8 +29,17 @@ namespace AIParkingApplication
             Console.WriteLine("Plate Detected Length: " + plateRectsDetected.Length);
             if (plateRectsDetected.Length > 0)
             {
-                Mat plateImage = GetBiggestPlate(plateRectsDetected, frame);
-                return plateImage;
+                try
+                {
+                    Mat plateImage = GetBiggestPlate(plateRectsDetected, frame);
+                    Cv2.Resize(plateImage, plateImage, new Size(272, 272));
+                    return plateImage;
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine($"DetectPlate\t{ex.Message}");
+                    return frame;
+                }
             }
             else
             {

AIParkingApplication/PlateProcessor.cs

@@ -34,9 +34,6 @@ namespace AIParkingApplication
         {
             Mat plateDetected = plateType == PlateType.Square ? squarePlateDetector.DetectPlate(frame) : longPlateDetector.DetectPlate(frame);
 
-            //TODO: check size before resizing
-            Cv2.Resize(plateDetected, plateDetected, new OpenCvSharp.Size(272, 272));
-
             //TODO: Check if plateDetected empty
             OcrResult plateOcrResultFromEngine = await Util.SendEngineRequestAsync(plateDetected, plateType);
             Bitmap finalPlateImage;
@@ -64,10 +61,7 @@ namespace AIParkingApplication
         {
             try
             {
-                //TODO: check size before resizing
-                Cv2.Resize(frame, frame, new OpenCvSharp.Size(1280, 720));
                 FinalPlateResult plateResult;
-
                 if (isSupportLongPlate)
                 {
                     plateResult = await DetectPlateAndDoOcrEngineAsync(PlateType.Long, frame);
@@ -87,7 +81,11 @@ namespace AIParkingApplication
             catch (Exception ex)
             {
                 Console.WriteLine($"{Util.GetCurrentMethodName()}\texMessage: {ex.Message}");
-                return new FinalPlateResult();
+                return new FinalPlateResult
+                {
+                    PlateString = string.Empty,
+                    PlateImage = frame.ToBitmap()
+                };
             }
         }