added test cases

tools/OcrDaemon/Daemon.cs

@@ -108,6 +108,8 @@ static class Daemon
         var engine = request.Engine ?? "tesseract";
         var preprocess = request.Preprocess ?? "none";
 
+        var kernelSize = request.Params?.KernelSize ?? 41;
+
         // No preprocess + tesseract = original fast path
         if (engine == "tesseract" && preprocess == "none")
             return ocrHandler.HandleOcr(request);
@@ -119,7 +121,7 @@ static class Daemon
         Bitmap processed;
         if (preprocess == "tophat")
         {
-            processed = ImagePreprocessor.PreprocessForOcr(bitmap);
+            processed = ImagePreprocessor.PreprocessForOcr(bitmap, kernelSize: kernelSize);
         }
         else if (preprocess == "bgsub")
         {
@@ -152,16 +154,24 @@ static class Daemon
     private static object HandleDiffOcrPipeline(OcrHandler ocrHandler, PythonOcrBridge pythonBridge, Request request)
     {
         var engine = request.Engine ?? "tesseract";
-        var preprocess = request.Preprocess ?? "bgsub";
         var isPythonEngine = engine is "easyocr" or "paddleocr";
+        var p = request.Params?.Clone() ?? new DiffOcrParams();
+        if (request.Threshold > 0) p.DiffThresh = request.Threshold;
 
-        // No engine override + no preprocess override = original Tesseract path (supports test/tune params)
-        if (engine == "tesseract" && request.Preprocess == null)
+        // Determine preprocess mode: explicit request.Preprocess > params.UseBackgroundSub > default "bgsub"
+        string preprocess;
+        if (request.Preprocess != null)
+            preprocess = request.Preprocess;
+        else if (request.Params != null)
+            preprocess = p.UseBackgroundSub ? "bgsub" : "tophat";
+        else
+            preprocess = "bgsub";
+
+        // No engine override + no preprocess override + no params = original Tesseract path
+        if (engine == "tesseract" && request.Preprocess == null && request.Params == null)
             return ocrHandler.HandleDiffOcr(request);
 
         var sw = System.Diagnostics.Stopwatch.StartNew();
-        var p = new DiffOcrParams();
-        if (request.Threshold > 0) p.DiffThresh = request.Threshold;
 
         var cropResult = ocrHandler.DiffCrop(request, p);
         if (cropResult == null)
@@ -174,13 +184,14 @@ static class Daemon
         Bitmap processed;
         if (preprocess == "bgsub")
         {
-            int upscale = isPythonEngine ? 1 : 2;
+            int upscale = isPythonEngine ? 1 : p.Upscale;
             processed = ImagePreprocessor.PreprocessWithBackgroundSub(
-                cropped, refCropped, dimPercentile: 40, textThresh: 60, upscale: upscale, softThreshold: false);
+                cropped, refCropped, dimPercentile: p.DimPercentile, textThresh: p.TextThresh,
+                upscale: upscale, softThreshold: p.SoftThreshold);
         }
         else if (preprocess == "tophat")
         {
-            processed = ImagePreprocessor.PreprocessForOcr(cropped);
+            processed = ImagePreprocessor.PreprocessForOcr(cropped, kernelSize: p.KernelSize);
         }
         else // "none"
         {

tools/OcrDaemon/Models.cs

@@ -45,6 +45,9 @@ class Request
 
     [JsonPropertyName("preprocess")]
     public string? Preprocess { get; set; }
+
+    [JsonPropertyName("params")]
+    public DiffOcrParams? Params { get; set; }
 }
 
 class RegionRect

tools/OcrDaemon/tessdata/cases.json

@@ -49,5 +49,31 @@
             "Asking Price:",
             "35x Divine Orb"
         ]
+    },
+    {
+        "id": "raphpith1",
+        "image": "images/raphpith.png",
+        "fullImage": "images/raphpith-snapshot.png",
+        "expected": [
+            "RATHPITH GLOBE",
+            "SACRED Focus",
+            "Focus",
+            "Quality: +20%",
+            "Energy Shield: 104",
+            "Requires: Level 75",
+            "16% Increased Energy Shield",
+            "+24 To Maximum Mana",
+            "+5% to all Elemental Resistances",
+            "NON-CHANNELLING SPELLS HAVE 3% INCREASED MAGNITUDE OF AlLMENTS PER 100 MAXIMUM LIFE",
+            "NON-CHANNELLING SPELLS DEAL 6% INCREASED DAMAGE PER 100 MAXIMUM MANA",
+            "+72 TO MAXIMUM LIFE",
+            "NON-CHANNELLING SPELLS HAVE 3% INCREASED CRITICAL HIT CHANCE PER 100 MAXIMUM LIFE",
+            "NON-CHANNELLING SPELLS DEAL 6% INCREASED DAMACE PER 100 MAXIMUM LIFE",
+            "Twice Corrupted",
+            "THE VAAL EMPTIED THEIR SLAVES OF BEATING HEARTS",
+            "AND LEFT A MOUNTAIN OF TWITCHING DEAD",
+            "Asking Price:",
+            "120x Divine Orb"
+        ]
     }
 ]