Initial

PdfMarker/Services/PdfTextExtractor.cs

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+using PdfMarker.Models;
+using UglyToad.PdfPig;
+
+namespace PdfMarker.Services;
+
+public class PdfTextExtractor
+{
+    public List<TextFeature> Extract(string filePath)
+    {
+        using var doc = PdfDocument.Open(filePath);
+
+        var result = new List<TextFeature>();
+
+        foreach (var page in doc.GetPages())
+        {
+            foreach (var word in page.GetWords())
+            {
+                if (IsTechnicalFeature(word.Text))
+                {
+                    result.Add(new TextFeature
+                    {
+                        X = word.BoundingBox.Left / page.Width,
+                        Y = 1 - (word.BoundingBox.Bottom / page.Height),
+                        Text = word.Text
+                    });
+                }
+            }
+        }
+
+        return result;
+    }
+
+    bool IsTechnicalFeature(string text)
+    {
+        return text.Contains("Ø")
+               || text.Contains("R")
+               || text.Contains("x45")
+               || text.Contains("H7");
+    }
+}