check point

Hawkeye.VisionBuilder.Workflow/Operations/Morphology/TakeBiggestOperation.cs

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+using System.Collections;
+using Hawkeye.VisionBuilder.Workflow.Datatypes;
+using Hawkeye.VisionBuilder.Workflow.Operations.Attributes;
+using OpenCvSharp;
+
+namespace Hawkeye.VisionBuilder.Workflow.Operations.Morphology;
+
+[Category("Morphology")]
+public class TakeBiggestOperation : BaseOperation
+{
+    public TakeBiggestOperation()
+    {
+        CanHaveProcessingError = false;
+    }
+
+    protected override void InterpretInternal(Context context)
+    {
+        if (!CheckImageExists(context)) return;
+        if (!CheckGrayscale(context)) return;
+
+        var image = context.ActiveImage!.ImageData;
+        
+        Cv2.FindContours(image, out var contours, out var hierarchy, RetrievalModes.External, ContourApproximationModes.ApproxSimple);
+
+        if (contours.Length == 0)
+        {
+            SetError("No blobs found.");
+            return;
+        }
+
+        var largestContour = contours.OrderByDescending(c => Cv2.ContourArea(c)).First();
+        var mask = Mat.Zeros(image.Size(), MatType.CV_8UC1).ToMat();
+        
+        Cv2.DrawContours(mask, new[] {largestContour}, -1, 255, -1);
+
+        context.ActiveImage = new HawkeyeImage()
+        {
+            ImageData = mask
+        };
+
+        Status = "Biggest blob extracted";
+        Result = true;
+    }
+
+    public override void Save(BinaryWriter bw)
+    {
+        base.Save(bw);
+    }
+
+    public override void Load(BinaryReader br)
+    {
+        base.Load(br);
+    }
+}