diff --git a/AIParkingApplication/LaneIn.cs b/AIParkingApplication/LaneIn.cs
index 2fa3881..a5fd0c6 100644
--- a/AIParkingApplication/LaneIn.cs
+++ b/AIParkingApplication/LaneIn.cs
@@ -27,7 +27,7 @@ namespace AIParkingApplication
 
         private System.Drawing.Point StartPoint { get; set; }
         private System.Drawing.Point CurrentCursorPosition { get; set; }
-        private Rectangle roiBox;
+        private Rectangle pictureBoxRoi;
         private bool IsDrawBox { get; set; }
 
         public LaneIn(int doorId,
@@ -152,17 +152,19 @@ namespace AIParkingApplication
 
         private async Task<FinalPlateResult> ProcessFrameImage(PlateProcessor plateProcessor, Mat frame, bool isRetryMode)
         {
+            var starTime = DateTime.Now;
+            Cv2.Resize(frame, frame, new OpenCvSharp.Size(1280, 720));
+            Rect roiBoxRect = Util.convertRectangleToRect(pictureBoxRoi, pictureBoxPlateVideo);
+            Mat frameRoi = frame[roiBoxRect];
             try
             {
-                var starTime = DateTime.Now;
-                Cv2.Resize(frame, frame, new OpenCvSharp.Size(1280, 720));
-                FinalPlateResult finalPlateResult = await plateProcessor.ProcessPlate(frame);
+                FinalPlateResult finalPlateResult = await plateProcessor.ProcessPlate(frameRoi);
 
                 if (isRetryMode && !plateProcessor.IsPlateStringValid(finalPlateResult.PlateString))
                 {
                     Thread.Sleep(1000);
                     overviewCamera.RequestCaptureOneFrame();
-                    finalPlateResult = await plateProcessor.ProcessPlate(frame);
+                    finalPlateResult = await plateProcessor.ProcessPlate(frameRoi);
                     Console.WriteLine("ProcessFrameImage Retry Mode");
                 }
                 appLogger.Log(LogLevel.Info, $"ProcessFrameImage: {(DateTime.Now - starTime).TotalMilliseconds} ms");
@@ -174,7 +176,7 @@ namespace AIParkingApplication
                 appLogger.Log(LogLevel.Info, $"ProcessFrameImage: ex: {ex.Message}");
                 return new FinalPlateResult
                 {
-                    PlateImage = frame,
+                    PlateImage = frameRoi,
                     PlateString = string.Empty,
                     PlateType = PlateType.Square
                 };
@@ -246,7 +248,7 @@ namespace AIParkingApplication
             if (e.Button == MouseButtons.Left)
             {
                 StartPoint = e.Location;
-                roiBox = new Rectangle(StartPoint, new System.Drawing.Size(0, 0));
+                pictureBoxRoi = new Rectangle(StartPoint, new System.Drawing.Size(0, 0));
                 IsDrawBox = true;
             }
         }
@@ -256,27 +258,29 @@ namespace AIParkingApplication
             if (IsDrawBox)
             {
                 CurrentCursorPosition = e.Location;
-                roiBox.Width = CurrentCursorPosition.X - StartPoint.X;
-                roiBox.Height = CurrentCursorPosition.Y - StartPoint.Y;
+                pictureBoxRoi.Width = CurrentCursorPosition.X - StartPoint.X;
+                pictureBoxRoi.Height = CurrentCursorPosition.Y - StartPoint.Y;
             }
             Refresh();
         }
 
         private void pictureBoxPlateVideo_MouseUp(object sender, MouseEventArgs e)
         {
-            if (StartPoint.X + roiBox.Width > pictureBoxPlateVideo.Width || StartPoint.Y + roiBox.Height > pictureBoxPlateVideo.Height)
+            if (StartPoint.X + pictureBoxRoi.Width > pictureBoxPlateVideo.Width || StartPoint.Y + pictureBoxRoi.Height > pictureBoxPlateVideo.Height)
             {
-                roiBox.X = roiBox.Y = 0;
-                roiBox.Width = pictureBoxPlateVideo.Width;
-                roiBox.Height = pictureBoxPlateVideo.Height;
+                pictureBoxRoi.X = pictureBoxRoi.Y = 0;
+                pictureBoxRoi.Width = pictureBoxPlateVideo.Width;
+                pictureBoxRoi.Height = pictureBoxPlateVideo.Height;
             }
             IsDrawBox = false;
         }
 
         private void pictureBoxPlateVideo_Paint(object sender, PaintEventArgs e)
         {
-            Pen redPen = new Pen(Color.FromArgb(255, 255, 0, 0), 4);
-            e.Graphics.DrawRectangle(redPen, roiBox);
+            Pen redPen = new Pen(Color.FromArgb(255, 255, 0, 0), 3);
+            e.Graphics.DrawRectangle(redPen, pictureBoxRoi);
         }
+
+        
     }
 }
\ No newline at end of file
diff --git a/AIParkingApplication/LaneOut.cs b/AIParkingApplication/LaneOut.cs
index d2fcf09..24963c2 100644
--- a/AIParkingApplication/LaneOut.cs
+++ b/AIParkingApplication/LaneOut.cs
@@ -29,7 +29,7 @@ namespace AIParkingApplication
 
         private System.Drawing.Point StartPoint { get; set; }
         private System.Drawing.Point CurrentCursorPosition { get; set; }
-        private Rectangle roiBox;
+        private Rectangle pictureBoxRoi;
         private bool IsDrawBox { get; set; }
 
         public LaneOut(int doorId,
@@ -196,10 +196,13 @@ namespace AIParkingApplication
 
         private async Task<FinalPlateResult> ProcessFrameImage(PlateProcessor plateProcessor, Mat frame, bool isRetryMode)
         {
+            var starTime = DateTime.Now;
+            Cv2.Resize(frame, frame, new OpenCvSharp.Size(1280, 720));
+            Rect roiBoxRect = Util.convertRectangleToRect(pictureBoxRoi, pictureBoxPlateVideo);
+            Mat frameRoi = frame[roiBoxRect];
             try
             {
-                var starTime = DateTime.Now;
-                Cv2.Resize(frame, frame, new OpenCvSharp.Size(1280, 720));
+                
                 FinalPlateResult finalPlateResult = await plateProcessor.ProcessPlate(frame);
 
                 if (isRetryMode && !plateProcessor.IsPlateStringValid(finalPlateResult.PlateString))
@@ -326,7 +329,7 @@ namespace AIParkingApplication
             if (e.Button == MouseButtons.Left)
             {
                 StartPoint = e.Location;
-                roiBox = new Rectangle(StartPoint, new System.Drawing.Size(0, 0));
+                pictureBoxRoi = new Rectangle(StartPoint, new System.Drawing.Size(0, 0));
                 IsDrawBox = true;
             }
         }
@@ -336,19 +339,19 @@ namespace AIParkingApplication
             if (IsDrawBox)
             {
                 CurrentCursorPosition = e.Location;
-                roiBox.Width = CurrentCursorPosition.X - StartPoint.X;
-                roiBox.Height = CurrentCursorPosition.Y - StartPoint.Y;
+                pictureBoxRoi.Width = CurrentCursorPosition.X - StartPoint.X;
+                pictureBoxRoi.Height = CurrentCursorPosition.Y - StartPoint.Y;
             }
             Refresh();
         }
 
         private void pictureBoxPlateVideo_MouseUp(object sender, MouseEventArgs e)
         {
-            if (StartPoint.X + roiBox.Width > pictureBoxPlateVideo.Width || StartPoint.Y + roiBox.Height > pictureBoxPlateVideo.Height)
+            if (StartPoint.X + pictureBoxRoi.Width > pictureBoxPlateVideo.Width || StartPoint.Y + pictureBoxRoi.Height > pictureBoxPlateVideo.Height)
             {
-                roiBox.X = roiBox.Y = 0;
-                roiBox.Width = pictureBoxPlateVideo.Width;
-                roiBox.Height = pictureBoxPlateVideo.Height;
+                pictureBoxRoi.X = pictureBoxRoi.Y = 0;
+                pictureBoxRoi.Width = pictureBoxPlateVideo.Width;
+                pictureBoxRoi.Height = pictureBoxPlateVideo.Height;
             }
             IsDrawBox = false;
         }
@@ -356,7 +359,7 @@ namespace AIParkingApplication
         private void pictureBoxPlateVideo_Paint(object sender, PaintEventArgs e)
         {
             Pen redPen = new Pen(Color.FromArgb(255, 255, 0, 0), 4);
-            e.Graphics.DrawRectangle(redPen, roiBox);
+            e.Graphics.DrawRectangle(redPen, pictureBoxRoi);
         }
     }
 }
diff --git a/AIParkingApplication/Util.cs b/AIParkingApplication/Util.cs
index d38286d..bfac376 100644
--- a/AIParkingApplication/Util.cs
+++ b/AIParkingApplication/Util.cs
@@ -1,4 +1,5 @@
 using Newtonsoft.Json;
+using OpenCvSharp;
 using System;
 using System.Configuration;
 using System.Diagnostics;
@@ -7,6 +8,7 @@ using System.IO;
 using System.Net;
 using System.Net.NetworkInformation;
 using System.Threading.Tasks;
+using System.Windows.Forms;
 
 namespace AIParkingApplication
 {
@@ -135,6 +137,18 @@ namespace AIParkingApplication
                 Console.WriteLine($"{DateTime.Now.GetTimeFormatted()}\tAddOrUpdateAppSettings\t{ex.Message}");
             }
         }
+
+        public static Rect convertRectangleToRect(Rectangle pictureBoxRoi, PictureBox pictureBoxPlateVideo)
+        {
+            Rect temp = new Rect
+            {
+                X = pictureBoxRoi.X * 1280 / pictureBoxPlateVideo.Width,
+                Y = pictureBoxRoi.Y * 720 / pictureBoxPlateVideo.Height,
+                Width = pictureBoxRoi.Width * 1280 / pictureBoxPlateVideo.Width,
+                Height = pictureBoxRoi.Height * 720 / pictureBoxPlateVideo.Height
+            };
+            return temp;
+        }
     }
 
     public class PlateRequestEngineModel