Sort of finds the receipt not really

Need to read more into params and figure out best config and then run with it

src/MayShow.csproj

@@ -51,6 +51,7 @@
     <PackageReference Include="Deadpikle.AvaloniaProgressRing" Version="0.10.11-preview20251127001" />
     <PackageReference Include="DialogHost.Avalonia" Version="0.10.4" />
     <PackageReference Include="Xaml.Behaviors.Interactions.DragAndDrop.DataGrid" Version="11.3.9.5" />
+    <PackageReference Include="OpenCvSharp4" Version="4.13.0.20260226" />
   </ItemGroup>
   <ItemGroup Condition=" '$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::OSX)))'  ">
     <PackageReference Include="OpenCvSharp4.runtime.osx.10.15-universal" Version="4.7.0.20230224" />

src/ViewModels/MainViewModel.cs

@@ -20,6 +20,7 @@ using MayShow.Helpers;
 using MayShow.Interfaces;
 using MayShow.Models;
 using MayShows.Helpers;
+using OpenCvSharp;
 
 namespace MayShow.ViewModels;
 
@@ -516,6 +517,29 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
         return "report_data.json";
     }
 
+    public void TestReceiptFinding(object f) => TestReceiptFindingImpl((ReportFile)f);
+
+    private void TestReceiptFindingImpl(ReportFile file)
+    {
+        LogInfo("Running receipt edge detection...");
+        using var src = new Mat(file.FilePath, ImreadModes.Grayscale);
+        using var dst = new Mat();
+        using var blur = new Mat();
+        using var dilated = new Mat();
+        Cv2.GaussianBlur(src, blur, new OpenCvSharp.Size(5.0, 5.0), 0.0, 0.0, BorderTypes.Constant);
+        // Cv2.Threshold(dst, dst, 160, 255, ThresholdTypes.Binary & ThresholdTypes.Otsu);
+        var kernel = Cv2.GetStructuringElement(MorphShapes.Rect, new Size(9,9));
+        Cv2.Dilate(blur, dilated, kernel);
+        Cv2.Canny(dilated, dst, 40, 60, 3);
+        using (new OpenCvSharp.Window("src image", src))
+        using (new OpenCvSharp.Window("blur image", blur))
+        using (new OpenCvSharp.Window("dilated image", dilated))
+        using (new OpenCvSharp.Window("dst image", dst))
+        {
+            Cv2.WaitKey();
+        }
+    }
+
     public byte[]? GetFont(string faceName)
     {
         LogInfo(string.Format("Loading font {0}", faceName));

src/Views/MainView.axaml

@@ -210,6 +210,12 @@
                                 <TextBlock FontSize="12"><Run Text="&#xf07c;" FontFamily="{StaticResource FontAwesomeSolid}"/> Open File</TextBlock>
                             </Button.Content>
                         </Button>
+                        <Button Command="{Binding $parent[DataGrid].((vm:MainViewModel)DataContext).TestReceiptFinding}" 
+                                CommandParameter="{Binding}">
+                            <Button.Content>
+                                <TextBlock FontSize="12"><Run Text="&#xf07c;" FontFamily="{StaticResource FontAwesomeSolid}"/> TEST RECEIPT FIND</TextBlock>
+                            </Button.Content>
+                        </Button>
                     </StackPanel>
                 </Grid>
             </DataTemplate>