AIParkingApplication/AIParkingApplicationForm.Designer.cs

@@ -28,37 +28,13 @@
         /// </summary>
         private void InitializeComponent()
         {
-            this.btnStopLaneIn = new System.Windows.Forms.Button();
-            this.btnStartLaneIn = new System.Windows.Forms.Button();
             this.SuspendLayout();
             // 
-            // btnStopLaneIn
-            // 
-            this.btnStopLaneIn.Location = new System.Drawing.Point(840, 205);
-            this.btnStopLaneIn.Name = "btnStopLaneIn";
-            this.btnStopLaneIn.Size = new System.Drawing.Size(75, 23);
-            this.btnStopLaneIn.TabIndex = 0;
-            this.btnStopLaneIn.Text = "Stop";
-            this.btnStopLaneIn.UseVisualStyleBackColor = true;
-            this.btnStopLaneIn.Click += new System.EventHandler(this.btnStopLaneIn_Click);
-            // 
-            // btnStartLaneIn
-            // 
-            this.btnStartLaneIn.Location = new System.Drawing.Point(840, 246);
-            this.btnStartLaneIn.Name = "btnStartLaneIn";
-            this.btnStartLaneIn.Size = new System.Drawing.Size(75, 23);
-            this.btnStartLaneIn.TabIndex = 0;
-            this.btnStartLaneIn.Text = "Start";
-            this.btnStartLaneIn.UseVisualStyleBackColor = true;
-            this.btnStartLaneIn.Click += new System.EventHandler(this.btnStartLaneIn_Click);
-            // 
             // AIParkingApplicationForm
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.ClientSize = new System.Drawing.Size(1350, 729);
-            this.Controls.Add(this.btnStartLaneIn);
-            this.Controls.Add(this.btnStopLaneIn);
             this.MinimumSize = new System.Drawing.Size(1366, 768);
             this.Name = "AIParkingApplicationForm";
             this.Text = "AIParking Application";
@@ -67,9 +43,6 @@
         }
 
         #endregion
-
-        private System.Windows.Forms.Button btnStopLaneIn;
-        private System.Windows.Forms.Button btnStartLaneIn;
     }
 }
 

AIParkingApplication/AIParkingApplicationForm.cs

@@ -5,18 +5,16 @@ namespace AIParkingApplication
     public partial class AIParkingApplicationForm : Form
     {
         //@"C:\CongRa_1.mp4"; @"C:\HS_test.mp4";  @"rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov"
-        private ApiController apiController;
-        private C3DeviceController c3Device;
-        private LaneIn laneIn;
-
         public AIParkingApplicationForm()
         {
             InitializeComponent();
             string serverBaseAddress = "http://localhost:80/";
-            apiController = new ApiController(serverBaseAddress);
+            ApiController apiController = new ApiController(serverBaseAddress);
-            c3Device = new C3DeviceController("192.168.1.200");
+            C3DeviceController c3Device = new C3DeviceController("192.168.1.200");
-            laneIn = new LaneIn(1, @"C:\HS_test.mp4", @"C:\HS_test.mp4", c3Device, apiController, true, false, true);
+            LaneIn laneIn = new LaneIn(1, @"C:\HS_test.mp4", @"C:\HS_test.mp4", c3Device, apiController, true, false, true);
+            //LaneIn laneOut = new LaneIn();
             Controls.Add(laneIn);
+            laneIn.Start();
             //laneOut.Location = new System.Drawing.Point(550, 0);
             //Controls.Add(laneOut);
 
@@ -25,15 +23,5 @@ namespace AIParkingApplication
             //Controls.Add(laneIn1);
             //laneIn1.Start();
         }
-
-        private void btnStopLaneIn_Click(object sender, System.EventArgs e)
-        {
-            laneIn.Stop();
-        }
-
-        private void btnStartLaneIn_Click(object sender, System.EventArgs e)
-        {
-            laneIn.Start();
-        }
     }
 }

AIParkingApplication/ApiController.cs

@@ -94,12 +94,12 @@ namespace AIParkingApplication
         }
 
         //Neu Dicrection la Out thi logID la logID lay ve khi check the
-        public async Task<SaveLogRespone> SaveLog(LaneDirection direction, string cardID,  string cameraID, PlateType plateType, string timestamp, string plateString, Mat plateImage, Mat plateImageResult, Mat plateFrameImage, Mat frameImage, string logID = "")
+        public async Task<SaveLogRespone> SaveLog(LaneDirection direction, string cardID,  string cameraID, PlateType plateType, string timestamp, string plateString, Mat plateImage, Mat plateImageResult, Mat PlateFrameImage, Mat FrameImage, string logID = "")
         {
             string plateImageBase64 = Convert.ToBase64String(plateImage.ToBytes());
             string plateImageResultBase64 = Convert.ToBase64String(plateImageResult.ToBytes());
-            string PlateFrameImageBase64 = Convert.ToBase64String(plateFrameImage.ToBytes());
+            string PlateFrameImageBase64 = Convert.ToBase64String(PlateFrameImage.ToBytes());
-            string FrameImageBase64 = Convert.ToBase64String(frameImage.ToBytes());
+            string FrameImageBase64 = Convert.ToBase64String(FrameImage.ToBytes());
             try
             {
                 var request = new SaveLogModel

AIParkingApplication/Camera.cs

@@ -20,9 +20,9 @@ namespace AIParkingApplication
         {
             this.streamUrl = streamUrl;
             isFrameRequested = false;
-            videoCapture = new VideoCapture();
             readStreamThread = new Thread(new ThreadStart(ReadVideoStream));
             readStreamThread.IsBackground = true;
+            videoCapture = new VideoCapture();
         }
 
         ~Camera()
@@ -48,13 +48,13 @@ namespace AIParkingApplication
 
         public void ReadVideoStream()
         {
+            Mat videoFrame = new Mat();
             if (!videoCapture.Open(streamUrl))
             {
                 OnOpenVideoStreamFailed?.Invoke(Cv2.ImRead(AppConstant.CAMERA_FAILED_IMAGE_PATH));
                 return;
             }
 
-            Mat videoFrame = new Mat();
             while (true)
             {
                 Thread.Sleep(50);     //Stream Thread Sleep
@@ -69,10 +69,6 @@ namespace AIParkingApplication
                         isFrameRequested = false;
                     }
                 }
-                else
-                {
-                    OnOpenVideoStreamFailed?.Invoke(Cv2.ImRead(AppConstant.CAMERA_FAILED_IMAGE_PATH));
-                }
             }
         }
 

AIParkingApplication/LaneIn.Designer.cs

@@ -40,7 +40,7 @@
             this.grbCardInformation = new System.Windows.Forms.GroupBox();
             this.lblCardTime = new System.Windows.Forms.Label();
             this.lblPlateString = new System.Windows.Forms.Label();
-            this.lblStatusInfo = new System.Windows.Forms.Label();
+            this.lblRecogizePlateStatus = new System.Windows.Forms.Label();
             ((System.ComponentModel.ISupportInitialize)(this.pictureBoxPlateImage)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.pictureBoxPlateVideo)).BeginInit();
             this.grbPlateCamera.SuspendLayout();
@@ -176,24 +176,24 @@
             this.lblPlateString.TabIndex = 0;
             this.lblPlateString.Text = "Biển số";
             // 
-            // lblStatusInfo
+            // lblRecogizePlateStatus
             // 
-            this.lblStatusInfo.BackColor = System.Drawing.Color.CornflowerBlue;
+            this.lblRecogizePlateStatus.BackColor = System.Drawing.Color.CornflowerBlue;
-            this.lblStatusInfo.Font = new System.Drawing.Font("Microsoft Sans Serif", 18F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblRecogizePlateStatus.Font = new System.Drawing.Font("Microsoft Sans Serif", 18F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
-            this.lblStatusInfo.ForeColor = System.Drawing.SystemColors.Control;
+            this.lblRecogizePlateStatus.ForeColor = System.Drawing.SystemColors.Control;
-            this.lblStatusInfo.Location = new System.Drawing.Point(1, 159);
+            this.lblRecogizePlateStatus.Location = new System.Drawing.Point(1, 159);
-            this.lblStatusInfo.Margin = new System.Windows.Forms.Padding(0);
+            this.lblRecogizePlateStatus.Margin = new System.Windows.Forms.Padding(0);
-            this.lblStatusInfo.Name = "lblStatusInfo";
+            this.lblRecogizePlateStatus.Name = "lblRecogizePlateStatus";
-            this.lblStatusInfo.Size = new System.Drawing.Size(440, 40);
+            this.lblRecogizePlateStatus.Size = new System.Drawing.Size(440, 40);
-            this.lblStatusInfo.TabIndex = 15;
+            this.lblRecogizePlateStatus.TabIndex = 15;
-            this.lblStatusInfo.Text = "XIN CHÀO";
+            this.lblRecogizePlateStatus.Text = "XIN CHÀO";
-            this.lblStatusInfo.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
+            this.lblRecogizePlateStatus.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
             // 
             // LaneIn
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.Controls.Add(this.lblStatusInfo);
+            this.Controls.Add(this.lblRecogizePlateStatus);
             this.Controls.Add(this.grbPlateCamera);
             this.Controls.Add(this.grbOverviewCamera);
             this.Controls.Add(this.lblLaneLabel);
@@ -201,7 +201,6 @@
             this.Margin = new System.Windows.Forms.Padding(0);
             this.Name = "LaneIn";
             this.Size = new System.Drawing.Size(442, 692);
-            this.Load += new System.EventHandler(this.LaneIn_Load);
             ((System.ComponentModel.ISupportInitialize)(this.pictureBoxPlateImage)).EndInit();
             ((System.ComponentModel.ISupportInitialize)(this.pictureBoxPlateVideo)).EndInit();
             this.grbPlateCamera.ResumeLayout(false);
@@ -227,6 +226,6 @@
         private System.Windows.Forms.GroupBox grbCardInformation;
         private System.Windows.Forms.Label lblPlateString;
         private System.Windows.Forms.Label lblCardTime;
-        private System.Windows.Forms.Label lblStatusInfo;
+        private System.Windows.Forms.Label lblRecogizePlateStatus;
     }
 }

AIParkingApplication/LaneIn.cs

@@ -51,34 +51,38 @@ namespace AIParkingApplication
             overviewCamera.OnOpenVideoStreamFailed += OverviewCamera_OnOpenVideoStreamFailed;
 
             plateProcessor = new PlateProcessor(this.isSupportSquarePlate, this.isSupportLongPlate);
+
+            if (!this.c3Device.Connect().HasError)
+            {
+                _ = this.c3Device.GetLogToReceiveNewCard();
+            }
         }
 
         private async void C3Device_OnNewCardReceived(int doorId, string cardNumber)
         {
-            ClearPlateAndOverviewImage();
             var cardInfoResult = await apiController.GetCardInformation(cardNumber);
-            if (!cardInfoResult.IsValid)
+            if (cardInfoResult.IsValid)
             {
-                lblStatusInfo.UpdateLabel("THẺ KHÔNG HỢP LỆ", Color.Purple);
+                if (cardInfoResult.Direction == "in")
-                return;
-            }
-
-            if (cardInfoResult.Direction != "in")
                 {
-                lblStatusInfo.UpdateLabel("THẺ ĐÃ ĐƯỢC SỬ DỤNG", Color.Red);
-                return;
-            }
-
                     plateCamera.RequestCaptureOneFrame();
                     overviewCamera.RequestCaptureOneFrame();
                     await Task.Delay(200);
 
                     var plateVideoFrame = plateCamera.CurrentFrame;                    
                     FinalPlateResult result = await ProcessFrameImage(plateProcessor, plateVideoFrame, isRetryMode);
-            pictureBoxPlateImage.UpdateImage(result.PlateImage.ToBitmap());
+                    pictureBoxPlateImage.Invoke(new Action(() =>
+                    {
+                        pictureBoxPlateImage.Image?.Dispose();
+                        pictureBoxPlateImage.Image = result.PlateImage.ToBitmap();
+                    }));
 
                     var overviewVideoFrame = overviewCamera.CurrentFrame;
-            pictureBoxOverviewImage.UpdateImage(overviewVideoFrame.ToBitmap());
+                    pictureBoxOverviewImage.Invoke(new Action(() =>
+                    {
+                        pictureBoxOverviewImage.Image?.Dispose();
+                        pictureBoxOverviewImage.Image = overviewVideoFrame.ToBitmap();
+                    }));
 
                     var cardInformation = await apiController.GetCardInformation(cardNumber);
                     ShowCardInfoOnUI(cardNumber, result.PlateString, cardInformation.CardType, DateTime.Now.ToString(AppConstant.DATETIME_FORMAT));
@@ -93,31 +97,59 @@ namespace AIParkingApplication
                     }
                     else
                     {
-                lblStatusInfo.UpdateLabel("KHÔNG CÓ KẾT NỐI ĐẾN MÁY CHỦ", Color.Red);
+                        lblRecogizePlateStatus.Invoke(new Action(() =>
+                        {
+                            lblRecogizePlateStatus.BackColor = Color.Red;
+                            lblRecogizePlateStatus.Text = "KHÔNG THỂ KẾT NỐI ĐẾN MÁY CHỦ";
+                        }));
+                    }
+                }
+                else
+                {
+                    lblRecogizePlateStatus.Invoke(new Action(() =>
+                    {
+                        lblRecogizePlateStatus.BackColor = Color.Red;
+                        lblRecogizePlateStatus.Text = "THẺ ĐÃ ĐƯỢC SỬ DỤNG";
+                    }));
+                }
+            }
+            else
+            {
+                lblRecogizePlateStatus.Invoke(new Action(() =>
+                {
+                    lblRecogizePlateStatus.BackColor = Color.Purple;
+                    lblRecogizePlateStatus.Text = "THẺ KHÔNG HỢP LỆ";
+                }));
             }
         }
 
         private void PlateCamera_OnOpenVideoStreamFailed(Mat videoFrame)
         {
-            pictureBoxPlateVideo.UpdateImage(videoFrame.ToBitmap());
+            pictureBoxPlateVideo.Invoke(new Action(() =>
+            {
+                pictureBoxPlateVideo.Image?.Dispose();
+                pictureBoxPlateVideo.Image = videoFrame.ToBitmap();
+            }));
         }
 
         private void OverviewCamera_OnOpenVideoStreamFailed(Mat videoFrame)
         {
-            pictureBoxOverviewVideo.UpdateImage(videoFrame.ToBitmap());
+            pictureBoxOverviewVideo.Invoke(new Action(() =>
-        }
-
-        private void ClearPlateAndOverviewImage()
             {
-            pictureBoxPlateImage.UpdateImage(null);
+                pictureBoxOverviewImage.Image?.Dispose();
-            pictureBoxOverviewImage.UpdateImage(null);
+                pictureBoxOverviewVideo.Image = videoFrame.ToBitmap();
+            }));
         }
 
         private void OpenDoor(int doorId)
         {
             if (c3Device.OpenDoor(doorId).HasError)
             {
-                lblStatusInfo.UpdateLabel("KHÔNG THỂ MỞ CỬA", Color.Red);
+                lblRecogizePlateStatus.Invoke(new Action(() =>
+                {
+                    lblRecogizePlateStatus.BackColor = Color.Red;
+                    lblRecogizePlateStatus.Text = "KHÔNG THỂ KẾT NỐI TỚI THIẾT BỊ MỞ CỬA";
+                }));
             }
         }
 
@@ -125,6 +157,7 @@ namespace AIParkingApplication
         {
             try
             {
+                //TODO: check size before resizing
                 Cv2.Resize(frame, frame, new OpenCvSharp.Size(1280, 720));
                 FinalPlateResult finalPlateResult = await plateProcessor.ProcessPlate(frame);
 
@@ -163,18 +196,42 @@ namespace AIParkingApplication
 
         private void ShowCardInfoOnUI(string cardNumber, string plateString, string cardType, string cardTime)
         {
-            lblCardNumber.UpdateLabel($"Số thẻ: {cardNumber}", lblCardNumber.BackColor);
+            lblCardNumber.Invoke(new Action(() =>
-            lblPlateString.UpdateLabel($"Biển số: {plateString}", lblPlateString.BackColor);
+            {
-            lblCardType.UpdateLabel($"Loại thẻ: {cardType}", lblCardType.BackColor);
+                lblCardNumber.Text = $"Số thẻ: {cardNumber}";
-            lblCardTime.UpdateLabel($"Thời gian: {cardTime}", lblCardTime.BackColor);
+            }));
-            lblStatusInfo.UpdateLabel(string.IsNullOrEmpty(plateString) ? "KHÔNG NHẬN DIỆN ĐƯỢC BIỂN SỐ" : $"MỜI XE {plateString} VÀO", string.IsNullOrEmpty(plateString) ? Color.Red : Color.Green);
+
+            lblPlateString.Invoke(new Action(() =>
+            {
+                lblPlateString.Text = $"Biển số: {plateString}";
+            }));
+
+            lblCardType.Invoke(new Action(() =>
+            {
+                lblCardType.Text = $"Loại thẻ: {cardType}";
+            }));
+
+            lblCardTime.Invoke(new Action(() =>
+            {
+                lblCardTime.Text = $"Thời gian: {cardTime}";
+            }));
+
+            lblRecogizePlateStatus.Invoke(new Action(() =>
+            {
+                lblRecogizePlateStatus.Text = string.IsNullOrEmpty(plateString) ? "KHÔNG NHẬN DIỆN ĐƯỢC BIỂN SỐ" : $"MỜI XE {plateString} VÀO";
+                lblRecogizePlateStatus.BackColor = string.IsNullOrEmpty(plateString) ? System.Drawing.Color.Red : System.Drawing.Color.Green;
+            }));
         }
 
         private void OverviewCameraOnVideoFrameReceived(Mat videoFrame)
         {
             try
             {
-                pictureBoxOverviewVideo.UpdateImage(videoFrame.ToBitmap());
+                pictureBoxOverviewVideo.Invoke(new Action(() =>
+                {
+                    pictureBoxOverviewVideo.Image?.Dispose();
+                    pictureBoxOverviewVideo.Image = videoFrame.ToBitmap();
+                }));
             }
             catch (Exception ex)
             {
@@ -186,29 +243,16 @@ namespace AIParkingApplication
         {
             try
             {
-                pictureBoxPlateVideo.UpdateImage(videoFrame.ToBitmap());
+                pictureBoxPlateVideo.Invoke(new Action(() =>
+                {
+                    pictureBoxPlateVideo.Image?.Dispose();
+                    pictureBoxPlateVideo.Image = videoFrame.ToBitmap();
+                }));
             }
             catch (Exception ex)
             {
                 Console.WriteLine($"{Util.GetCurrentMethodName()}\texMessage: {ex.Message}");
             }
         }
-
-        private void ConnectToDoorAccessControl()
-        {
-            if (!this.c3Device.Connect().HasError)
-            {
-                _ = this.c3Device.GetLogToReceiveNewCard();
-            }
-            else
-            {
-                lblStatusInfo.UpdateLabel("KHÔNG THỂ KẾT NỐI TỚI C3200", Color.Purple);
-            }
-        }
-
-        private void LaneIn_Load(object sender, EventArgs e)
-        {
-            ConnectToDoorAccessControl();
-        }
     }
 }

AIParkingApplication/LaneIn.resx

@@ -117,46 +117,4 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
-  <metadata name="pictureBoxPlateImage.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="pictureBoxPlateVideo.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="grbPlateCamera.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="pictureBoxOverviewImage.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="pictureBoxOverviewVideo.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="grbOverviewCamera.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="lblLaneLabel.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="lblCardType.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="lblCardNumber.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="grbCardInformation.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="lblCardTime.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="lblPlateString.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="lblStatusInfo.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="$this.Locked" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
 </root>

AIParkingApplication/LaneOut.cs

@@ -1,4 +1,12 @@
-using System.Windows.Forms;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Drawing;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
 
 namespace AIParkingApplication
 {

AIParkingApplication/PlateDetector.cs

@@ -71,6 +71,7 @@ namespace AIParkingApplication
             }
             Console.WriteLine($"GetBiggestPlate - Width: {biggestPlateRect.Width}\tHeight: {biggestPlateRect.Height}");
             Rect extendedRect = ExtendPlateRect(biggestPlateRect);
+            //TODO: check oversize frame
             Mat plateImage;
             try
             {

AIParkingApplication/Properties/AssemblyInfo.cs

@@ -1,4 +1,5 @@
 using System.Reflection;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 // General Information about an assembly is controlled through the following

AIParkingApplication/Statistic.cs

@@ -3,6 +3,7 @@ using System.Windows.Forms;
 using System.Threading;
 using Newtonsoft.Json;
 using System.Net.Http;
+using System.Xml.Serialization;
 
 namespace AIParkingApplication
 {

AIParkingApplication/Util.cs

@@ -2,18 +2,14 @@
 using OpenCvSharp;
 using System;
 using System.Diagnostics;
-using System.Drawing;
 using System.Net.Http;
 using System.Net.NetworkInformation;
 using System.Threading.Tasks;
-using System.Windows.Forms;
 
 namespace AIParkingApplication
 {
     public static class Util
     {
-        private static HttpClient httpClientEngine = new HttpClient { BaseAddress = new Uri("http://localhost:8080/"), Timeout = TimeSpan.FromMilliseconds(5000) };
-
         public static bool IsPingable(string destinationIPAddress, out long pingTime, int timeOut = UtilConstant.PING_TIMEOUT_MS)
         {
             var pingTask = Task.Factory.StartNew(async () =>
@@ -58,6 +54,8 @@ namespace AIParkingApplication
         {
             string plateImageBase64 = Convert.ToBase64String(plateImage.ToBytes());
             try
+            {
+                using (var client = new HttpClient { BaseAddress = new Uri("http://localhost:8080/"), Timeout = TimeSpan.FromMilliseconds(5000) })
                 {
                     var request = new PlateRequestEngineModel
                     {
@@ -65,35 +63,18 @@ namespace AIParkingApplication
                         Mode = plateType == PlateType.Square ? "square" : "long",
                         Display = "full"
                     };
-                HttpResponseMessage response = await httpClientEngine.PostAsJsonAsync("/get-from-frame", request);
+                    HttpResponseMessage response = await client.PostAsJsonAsync("/get-from-frame", request);
                     response.EnsureSuccessStatusCode();
                     var ocrResult = await response.Content.ReadAsAsync<OcrResult>();
                     return ocrResult;
                 }
+            }
             catch (Exception ex)
             {
                 Console.WriteLine($"SendEngineRequest : {ex.Message}");
                 return new OcrResult();
             }
         }
-
-        public static void UpdateImage(this PictureBox pictureBox, Bitmap image)
-        {
-            pictureBox.Invoke(new Action(() =>
-            {
-                pictureBox.Image?.Dispose();
-                pictureBox.Image = image;
-            }));
-        }
-
-        public static void UpdateLabel(this Label label, string text, Color color)
-        {
-            label.Invoke(new Action(() =>
-            {
-                label.BackColor = color;
-                label.Text = text;
-            }));
-        }
     }
 
     public class PlateRequestEngineModel